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589 lines
21 KiB
589 lines
21 KiB
/* |
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* |
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* Copyright 2015, Google Inc. |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are |
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* met: |
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* |
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* * Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* * Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following disclaimer |
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* in the documentation and/or other materials provided with the |
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* distribution. |
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* * Neither the name of Google Inc. nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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*/ |
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#include "src/core/ext/census/mlog.h" |
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#include <grpc/support/cpu.h> |
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#include <grpc/support/log.h> |
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#include <grpc/support/port_platform.h> |
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#include <grpc/support/sync.h> |
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#include <grpc/support/thd.h> |
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#include <grpc/support/time.h> |
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#include <grpc/support/useful.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include "test/core/util/test_config.h" |
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|
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// Change this to non-zero if you want more output. |
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#define VERBOSE 0 |
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|
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// Log size to use for all tests. |
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#define LOG_SIZE_IN_MB 1 |
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#define LOG_SIZE_IN_BYTES (LOG_SIZE_IN_MB << 20) |
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|
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// Fills in 'record' of size 'size'. Each byte in record is filled in with the |
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// same value. The value is extracted from 'record' pointer. |
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static void write_record(char* record, size_t size) { |
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char data = (char)((uintptr_t)record % 255); |
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memset(record, data, size); |
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} |
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|
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// Reads fixed size records. Returns the number of records read in |
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// 'num_records'. |
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static void read_records(size_t record_size, const char* buffer, |
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size_t buffer_size, int* num_records) { |
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GPR_ASSERT(buffer_size >= record_size); |
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GPR_ASSERT(buffer_size % record_size == 0); |
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*num_records = (int)(buffer_size / record_size); |
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for (int i = 0; i < *num_records; ++i) { |
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const char* record = buffer + (record_size * (size_t)i); |
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char data = (char)((uintptr_t)record % 255); |
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for (size_t j = 0; j < record_size; ++j) { |
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GPR_ASSERT(data == record[j]); |
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} |
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} |
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} |
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// Tries to write the specified number of records. Stops when the log gets |
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// full. Returns the number of records written. Spins for random |
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// number of times, up to 'max_spin_count', between writes. |
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static int write_records_to_log(int writer_id, size_t record_size, |
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int num_records, int max_spin_count) { |
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int counter = 0; |
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for (int i = 0; i < num_records; ++i) { |
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int spin_count = max_spin_count ? rand() % max_spin_count : 0; |
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if (VERBOSE && (counter++ == num_records / 10)) { |
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printf(" Writer %d: %d out of %d written\n", writer_id, i, num_records); |
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counter = 0; |
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} |
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char* record = (char*)(census_log_start_write(record_size)); |
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if (record == NULL) { |
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return i; |
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} |
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write_record(record, record_size); |
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census_log_end_write(record, record_size); |
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for (int j = 0; j < spin_count; ++j) { |
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GPR_ASSERT(j >= 0); |
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} |
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} |
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return num_records; |
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} |
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// Performs a single read iteration. Returns the number of records read. |
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static int perform_read_iteration(size_t record_size) { |
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const void* read_buffer = NULL; |
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size_t bytes_available; |
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int records_read = 0; |
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census_log_init_reader(); |
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while ((read_buffer = census_log_read_next(&bytes_available))) { |
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int num_records = 0; |
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read_records(record_size, (const char*)read_buffer, bytes_available, |
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&num_records); |
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records_read += num_records; |
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} |
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return records_read; |
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} |
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// Asserts that the log is empty. |
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static void assert_log_empty(void) { |
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census_log_init_reader(); |
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size_t bytes_available; |
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GPR_ASSERT(census_log_read_next(&bytes_available) == NULL); |
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} |
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// Fills the log and verifies data. If 'no fragmentation' is true, records |
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// are sized such that CENSUS_LOG_2_MAX_RECORD_SIZE is a multiple of record |
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// size. If not a circular log, verifies that the number of records written |
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// match the number of records read. |
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static void fill_log(size_t log_size, int no_fragmentation, int circular_log) { |
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size_t size; |
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if (no_fragmentation) { |
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int log2size = rand() % (CENSUS_LOG_2_MAX_RECORD_SIZE + 1); |
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size = ((size_t)1 << log2size); |
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} else { |
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while (1) { |
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size = 1 + ((size_t)rand() % CENSUS_LOG_MAX_RECORD_SIZE); |
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if (CENSUS_LOG_MAX_RECORD_SIZE % size) { |
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break; |
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} |
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} |
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} |
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int records_written = |
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write_records_to_log(0 /* writer id */, size, |
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(int)((log_size / size) * 2), 0 /* spin count */); |
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int records_read = perform_read_iteration(size); |
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if (!circular_log) { |
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GPR_ASSERT(records_written == records_read); |
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} |
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assert_log_empty(); |
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} |
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// Structure to pass args to writer_thread |
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typedef struct writer_thread_args { |
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// Index of this thread in the writers vector. |
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int index; |
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// Record size. |
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size_t record_size; |
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// Number of records to write. |
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int num_records; |
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// Used to signal when writer is complete |
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gpr_cv* done; |
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gpr_mu* mu; |
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int* count; |
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} writer_thread_args; |
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// Writes the given number of records of random size (up to kMaxRecordSize) and |
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// random data to the specified log. |
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static void writer_thread(void* arg) { |
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writer_thread_args* args = (writer_thread_args*)arg; |
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// Maximum number of times to spin between writes. |
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static const int MAX_SPIN_COUNT = 50; |
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int records_written = 0; |
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if (VERBOSE) { |
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printf(" Writer %d starting\n", args->index); |
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} |
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while (records_written < args->num_records) { |
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records_written += write_records_to_log(args->index, args->record_size, |
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args->num_records - records_written, |
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MAX_SPIN_COUNT); |
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if (records_written < args->num_records) { |
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// Ran out of log space. Sleep for a bit and let the reader catch up. |
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// This should never happen for circular logs. |
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if (VERBOSE) { |
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printf( |
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" Writer %d stalled due to out-of-space: %d out of %d " |
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"written\n", |
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args->index, records_written, args->num_records); |
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} |
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gpr_sleep_until(GRPC_TIMEOUT_MILLIS_TO_DEADLINE(10)); |
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} |
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} |
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// Done. Decrement count and signal. |
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gpr_mu_lock(args->mu); |
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(*args->count)--; |
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gpr_cv_signal(args->done); |
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if (VERBOSE) { |
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printf(" Writer %d done\n", args->index); |
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} |
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gpr_mu_unlock(args->mu); |
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} |
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// struct to pass args to reader_thread |
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typedef struct reader_thread_args { |
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// Record size. |
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size_t record_size; |
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// Interval between read iterations. |
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int read_iteration_interval_in_msec; |
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// Total number of records. |
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int total_records; |
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// Signalled when reader should stop. |
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gpr_cv stop; |
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int stop_flag; |
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// Used to signal when reader has finished |
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gpr_cv* done; |
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gpr_mu* mu; |
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int running; |
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} reader_thread_args; |
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// Reads and verifies the specified number of records. Reader can also be |
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// stopped via gpr_cv_signal(&args->stop). Sleeps for 'read_interval_in_msec' |
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// between read iterations. |
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static void reader_thread(void* arg) { |
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reader_thread_args* args = (reader_thread_args*)arg; |
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if (VERBOSE) { |
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printf(" Reader starting\n"); |
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} |
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gpr_timespec interval = gpr_time_from_micros( |
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args->read_iteration_interval_in_msec * 1000, GPR_TIMESPAN); |
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gpr_mu_lock(args->mu); |
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int records_read = 0; |
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int num_iterations = 0; |
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int counter = 0; |
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while (!args->stop_flag && records_read < args->total_records) { |
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gpr_cv_wait(&args->stop, args->mu, interval); |
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if (!args->stop_flag) { |
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records_read += perform_read_iteration(args->record_size); |
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GPR_ASSERT(records_read <= args->total_records); |
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if (VERBOSE && (counter++ == 100000)) { |
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printf(" Reader: %d out of %d read\n", records_read, |
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args->total_records); |
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counter = 0; |
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} |
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++num_iterations; |
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} |
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} |
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// Done |
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args->running = 0; |
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gpr_cv_signal(args->done); |
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if (VERBOSE) { |
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printf(" Reader: records: %d, iterations: %d\n", records_read, |
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num_iterations); |
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} |
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gpr_mu_unlock(args->mu); |
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} |
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// Creates NUM_WRITERS writers where each writer writes NUM_RECORDS_PER_WRITER |
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// records. Also, starts a reader that iterates over and reads blocks every |
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// READ_ITERATION_INTERVAL_IN_MSEC. |
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// Number of writers. |
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#define NUM_WRITERS 5 |
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static void multiple_writers_single_reader(int circular_log) { |
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// Sleep interval between read iterations. |
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static const int READ_ITERATION_INTERVAL_IN_MSEC = 10; |
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// Maximum record size. |
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static const size_t MAX_RECORD_SIZE = 20; |
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// Number of records written by each writer. This is sized such that we |
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// will write through the entire log ~10 times. |
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const int NUM_RECORDS_PER_WRITER = |
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(int)((10 * census_log_remaining_space()) / (MAX_RECORD_SIZE / 2)) / |
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NUM_WRITERS; |
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size_t record_size = ((size_t)rand() % MAX_RECORD_SIZE) + 1; |
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// Create and start writers. |
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writer_thread_args writers[NUM_WRITERS]; |
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int writers_count = NUM_WRITERS; |
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gpr_cv writers_done; |
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gpr_mu writers_mu; // protects writers_done and writers_count |
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gpr_cv_init(&writers_done); |
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gpr_mu_init(&writers_mu); |
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gpr_thd_id id; |
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for (int i = 0; i < NUM_WRITERS; ++i) { |
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writers[i].index = i; |
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writers[i].record_size = record_size; |
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writers[i].num_records = NUM_RECORDS_PER_WRITER; |
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writers[i].done = &writers_done; |
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writers[i].count = &writers_count; |
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writers[i].mu = &writers_mu; |
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gpr_thd_new(&id, &writer_thread, &writers[i], NULL); |
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} |
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// Start reader. |
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gpr_cv reader_done; |
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gpr_mu reader_mu; // protects reader_done and reader.running |
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reader_thread_args reader; |
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reader.record_size = record_size; |
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reader.read_iteration_interval_in_msec = READ_ITERATION_INTERVAL_IN_MSEC; |
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reader.total_records = NUM_WRITERS * NUM_RECORDS_PER_WRITER; |
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reader.stop_flag = 0; |
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gpr_cv_init(&reader.stop); |
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gpr_cv_init(&reader_done); |
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reader.done = &reader_done; |
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gpr_mu_init(&reader_mu); |
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reader.mu = &reader_mu; |
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reader.running = 1; |
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gpr_thd_new(&id, &reader_thread, &reader, NULL); |
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// Wait for writers to finish. |
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gpr_mu_lock(&writers_mu); |
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while (writers_count != 0) { |
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gpr_cv_wait(&writers_done, &writers_mu, gpr_inf_future(GPR_CLOCK_REALTIME)); |
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} |
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gpr_mu_unlock(&writers_mu); |
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gpr_mu_destroy(&writers_mu); |
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gpr_cv_destroy(&writers_done); |
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gpr_mu_lock(&reader_mu); |
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if (circular_log) { |
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// Stop reader. |
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reader.stop_flag = 1; |
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gpr_cv_signal(&reader.stop); |
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} |
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// wait for reader to finish |
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while (reader.running) { |
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gpr_cv_wait(&reader_done, &reader_mu, gpr_inf_future(GPR_CLOCK_REALTIME)); |
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} |
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if (circular_log) { |
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// Assert that there were no out-of-space errors. |
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GPR_ASSERT(0 == census_log_out_of_space_count()); |
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} |
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gpr_mu_unlock(&reader_mu); |
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gpr_mu_destroy(&reader_mu); |
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gpr_cv_destroy(&reader_done); |
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if (VERBOSE) { |
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printf(" Reader: finished\n"); |
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} |
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} |
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static void setup_test(int circular_log) { |
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census_log_initialize(LOG_SIZE_IN_MB, circular_log); |
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// GPR_ASSERT(census_log_remaining_space() == LOG_SIZE_IN_BYTES); |
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} |
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// Attempts to create a record of invalid size (size > |
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// CENSUS_LOG_MAX_RECORD_SIZE). |
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void test_invalid_record_size(void) { |
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static const size_t INVALID_SIZE = CENSUS_LOG_MAX_RECORD_SIZE + 1; |
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static const size_t VALID_SIZE = 1; |
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printf("Starting test: invalid record size\n"); |
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setup_test(0); |
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void* record = census_log_start_write(INVALID_SIZE); |
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GPR_ASSERT(record == NULL); |
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// Now try writing a valid record. |
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record = census_log_start_write(VALID_SIZE); |
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GPR_ASSERT(record != NULL); |
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census_log_end_write(record, VALID_SIZE); |
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// Verifies that available space went down by one block. In theory, this |
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// check can fail if the thread is context switched to a new CPU during the |
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// start_write execution (multiple blocks get allocated), but this has not |
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// been observed in practice. |
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// GPR_ASSERT(LOG_SIZE_IN_BYTES - CENSUS_LOG_MAX_RECORD_SIZE == |
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// census_log_remaining_space()); |
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census_log_shutdown(); |
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} |
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// Tests end_write() with a different size than what was specified in |
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// start_write(). |
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void test_end_write_with_different_size(void) { |
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static const size_t START_WRITE_SIZE = 10; |
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static const size_t END_WRITE_SIZE = 7; |
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printf("Starting test: end write with different size\n"); |
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setup_test(0); |
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void* record_written = census_log_start_write(START_WRITE_SIZE); |
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GPR_ASSERT(record_written != NULL); |
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census_log_end_write(record_written, END_WRITE_SIZE); |
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census_log_init_reader(); |
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size_t bytes_available; |
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const void* record_read = census_log_read_next(&bytes_available); |
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GPR_ASSERT(record_written == record_read); |
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GPR_ASSERT(END_WRITE_SIZE == bytes_available); |
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assert_log_empty(); |
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census_log_shutdown(); |
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} |
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// Verifies that pending records are not available via read_next(). |
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void test_read_pending_record(void) { |
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static const size_t PR_RECORD_SIZE = 1024; |
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printf("Starting test: read pending record\n"); |
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setup_test(0); |
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// Start a write. |
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void* record_written = census_log_start_write(PR_RECORD_SIZE); |
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GPR_ASSERT(record_written != NULL); |
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// As write is pending, read should fail. |
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census_log_init_reader(); |
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size_t bytes_available; |
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const void* record_read = census_log_read_next(&bytes_available); |
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GPR_ASSERT(record_read == NULL); |
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// A read followed by end_write() should succeed. |
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census_log_end_write(record_written, PR_RECORD_SIZE); |
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census_log_init_reader(); |
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record_read = census_log_read_next(&bytes_available); |
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GPR_ASSERT(record_written == record_read); |
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GPR_ASSERT(PR_RECORD_SIZE == bytes_available); |
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assert_log_empty(); |
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census_log_shutdown(); |
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} |
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// Tries reading beyond pending write. |
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void test_read_beyond_pending_record(void) { |
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printf("Starting test: read beyond pending record\n"); |
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setup_test(0); |
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// Start a write. |
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const size_t incomplete_record_size = 10; |
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void* incomplete_record = census_log_start_write(incomplete_record_size); |
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GPR_ASSERT(incomplete_record != NULL); |
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const size_t complete_record_size = 20; |
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void* complete_record = census_log_start_write(complete_record_size); |
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GPR_ASSERT(complete_record != NULL); |
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GPR_ASSERT(complete_record != incomplete_record); |
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census_log_end_write(complete_record, complete_record_size); |
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// Now iterate over blocks to read completed records. |
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census_log_init_reader(); |
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size_t bytes_available; |
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const void* record_read = census_log_read_next(&bytes_available); |
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GPR_ASSERT(complete_record == record_read); |
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GPR_ASSERT(complete_record_size == bytes_available); |
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// Complete first record. |
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census_log_end_write(incomplete_record, incomplete_record_size); |
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// Have read past the incomplete record, so read_next() should return NULL. |
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// NB: this test also assumes our thread did not get switched to a different |
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// CPU between the two start_write calls |
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record_read = census_log_read_next(&bytes_available); |
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GPR_ASSERT(record_read == NULL); |
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// Reset reader to get the newly completed record. |
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census_log_init_reader(); |
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record_read = census_log_read_next(&bytes_available); |
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GPR_ASSERT(incomplete_record == record_read); |
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GPR_ASSERT(incomplete_record_size == bytes_available); |
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assert_log_empty(); |
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census_log_shutdown(); |
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} |
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|
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// Tests scenario where block being read is detached from a core and put on the |
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// dirty list. |
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void test_detached_while_reading(void) { |
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printf("Starting test: detached while reading\n"); |
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setup_test(0); |
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// Start a write. |
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static const size_t DWR_RECORD_SIZE = 10; |
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void* record_written = census_log_start_write(DWR_RECORD_SIZE); |
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GPR_ASSERT(record_written != NULL); |
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census_log_end_write(record_written, DWR_RECORD_SIZE); |
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// Read this record. |
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census_log_init_reader(); |
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size_t bytes_available; |
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const void* record_read = census_log_read_next(&bytes_available); |
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GPR_ASSERT(record_read != NULL); |
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GPR_ASSERT(DWR_RECORD_SIZE == bytes_available); |
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// Now fill the log. This will move the block being read from core-local |
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// array to the dirty list. |
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while ((record_written = census_log_start_write(DWR_RECORD_SIZE))) { |
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census_log_end_write(record_written, DWR_RECORD_SIZE); |
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} |
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// In this iteration, read_next() should only traverse blocks in the |
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// core-local array. Therefore, we expect at most gpr_cpu_num_cores() more |
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// blocks. As log is full, if read_next() is traversing the dirty list, we |
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// will get more than gpr_cpu_num_cores() blocks. |
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int block_read = 0; |
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while ((record_read = census_log_read_next(&bytes_available))) { |
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++block_read; |
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GPR_ASSERT(block_read <= (int)gpr_cpu_num_cores()); |
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} |
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census_log_shutdown(); |
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} |
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// Fills non-circular log with records sized such that size is a multiple of |
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// CENSUS_LOG_MAX_RECORD_SIZE (no per-block fragmentation). |
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void test_fill_log_no_fragmentation(void) { |
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printf("Starting test: fill log no fragmentation\n"); |
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const int circular = 0; |
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setup_test(circular); |
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fill_log(LOG_SIZE_IN_BYTES, 1 /* no fragmentation */, circular); |
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census_log_shutdown(); |
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} |
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|
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// Fills circular log with records sized such that size is a multiple of |
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// CENSUS_LOG_MAX_RECORD_SIZE (no per-block fragmentation). |
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void test_fill_circular_log_no_fragmentation(void) { |
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printf("Starting test: fill circular log no fragmentation\n"); |
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const int circular = 1; |
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setup_test(circular); |
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fill_log(LOG_SIZE_IN_BYTES, 1 /* no fragmentation */, circular); |
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census_log_shutdown(); |
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} |
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|
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// Fills non-circular log with records that may straddle end of a block. |
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void test_fill_log_with_straddling_records(void) { |
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printf("Starting test: fill log with straddling records\n"); |
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const int circular = 0; |
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setup_test(circular); |
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fill_log(LOG_SIZE_IN_BYTES, 0 /* block straddling records */, circular); |
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census_log_shutdown(); |
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} |
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|
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// Fills circular log with records that may straddle end of a block. |
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void test_fill_circular_log_with_straddling_records(void) { |
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printf("Starting test: fill circular log with straddling records\n"); |
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const int circular = 1; |
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setup_test(circular); |
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fill_log(LOG_SIZE_IN_BYTES, 0 /* block straddling records */, circular); |
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census_log_shutdown(); |
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} |
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|
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// Tests scenario where multiple writers and a single reader are using a log |
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// that is configured to discard old records. |
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void test_multiple_writers_circular_log(void) { |
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printf("Starting test: multiple writers circular log\n"); |
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const int circular = 1; |
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setup_test(circular); |
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multiple_writers_single_reader(circular); |
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census_log_shutdown(); |
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} |
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|
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// Tests scenario where multiple writers and a single reader are using a log |
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// that is configured to discard old records. |
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void test_multiple_writers(void) { |
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printf("Starting test: multiple writers\n"); |
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const int circular = 0; |
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setup_test(circular); |
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multiple_writers_single_reader(circular); |
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census_log_shutdown(); |
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} |
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|
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// Repeat the straddling records and multiple writers tests with a small log. |
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void test_small_log(void) { |
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printf("Starting test: small log\n"); |
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const int circular = 0; |
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census_log_initialize(0, circular); |
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size_t log_size = census_log_remaining_space(); |
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GPR_ASSERT(log_size > 0); |
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fill_log(log_size, 0, circular); |
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census_log_shutdown(); |
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census_log_initialize(0, circular); |
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multiple_writers_single_reader(circular); |
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census_log_shutdown(); |
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} |
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|
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void test_performance(void) { |
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for (size_t write_size = 1; write_size < CENSUS_LOG_MAX_RECORD_SIZE; |
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write_size *= 2) { |
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setup_test(0); |
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gpr_timespec start_time = gpr_now(GPR_CLOCK_REALTIME); |
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int nrecords = 0; |
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while (1) { |
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void* record = census_log_start_write(write_size); |
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if (record == NULL) { |
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break; |
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} |
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census_log_end_write(record, write_size); |
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nrecords++; |
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} |
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gpr_timespec write_time = |
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gpr_time_sub(gpr_now(GPR_CLOCK_REALTIME), start_time); |
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double write_time_micro = |
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(double)write_time.tv_sec * 1000000 + (double)write_time.tv_nsec / 1000; |
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census_log_shutdown(); |
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printf( |
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"Wrote %d %d byte records in %.3g microseconds: %g records/us " |
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"(%g ns/record), %g gigabytes/s\n", |
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nrecords, (int)write_size, write_time_micro, |
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nrecords / write_time_micro, 1000 * write_time_micro / nrecords, |
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(double)((int)write_size * nrecords) / write_time_micro / 1000); |
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} |
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} |
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|
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int main(int argc, char** argv) { |
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grpc_test_init(argc, argv); |
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gpr_time_init(); |
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srand((unsigned)gpr_now(GPR_CLOCK_REALTIME).tv_nsec); |
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test_invalid_record_size(); |
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test_end_write_with_different_size(); |
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test_read_pending_record(); |
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test_read_beyond_pending_record(); |
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test_detached_while_reading(); |
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test_fill_log_no_fragmentation(); |
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test_fill_circular_log_no_fragmentation(); |
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test_fill_log_with_straddling_records(); |
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test_fill_circular_log_with_straddling_records(); |
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test_small_log(); |
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test_multiple_writers(); |
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test_multiple_writers_circular_log(); |
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test_performance(); |
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return 0; |
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}
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