mirror of https://github.com/grpc/grpc.git
Yash Tibrewal
6 years ago
committed by
GitHub
parent
a144c13201
commit
8d47cd4992
52 changed files with 1104 additions and 68 deletions
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/*
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* |
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* Copyright 2018 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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#include <grpc/support/port_platform.h> |
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#include "src/core/lib/iomgr/buffer_list.h" |
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#include "src/core/lib/iomgr/port.h" |
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#include <grpc/support/log.h> |
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#ifdef GRPC_LINUX_ERRQUEUE |
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#include <time.h> |
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#include "src/core/lib/gprpp/memory.h" |
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namespace grpc_core { |
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void TracedBuffer::AddNewEntry(TracedBuffer** head, uint32_t seq_no, |
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void* arg) { |
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GPR_DEBUG_ASSERT(head != nullptr); |
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TracedBuffer* new_elem = New<TracedBuffer>(seq_no, arg); |
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/* Store the current time as the sendmsg time. */ |
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new_elem->ts_.sendmsg_time = gpr_now(GPR_CLOCK_REALTIME); |
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if (*head == nullptr) { |
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*head = new_elem; |
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return; |
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} |
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/* Append at the end. */ |
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TracedBuffer* ptr = *head; |
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while (ptr->next_ != nullptr) { |
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ptr = ptr->next_; |
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} |
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ptr->next_ = new_elem; |
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} |
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namespace { |
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/** Fills gpr_timespec gts based on values from timespec ts */ |
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void fill_gpr_from_timestamp(gpr_timespec* gts, const struct timespec* ts) { |
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gts->tv_sec = ts->tv_sec; |
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gts->tv_nsec = static_cast<int32_t>(ts->tv_nsec); |
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gts->clock_type = GPR_CLOCK_REALTIME; |
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} |
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/** The saved callback function that will be invoked when we get all the
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* timestamps that we are going to get for a TracedBuffer. */ |
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void (*timestamps_callback)(void*, grpc_core::Timestamps*, |
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grpc_error* shutdown_err); |
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} /* namespace */ |
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void TracedBuffer::ProcessTimestamp(TracedBuffer** head, |
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struct sock_extended_err* serr, |
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struct scm_timestamping* tss) { |
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GPR_DEBUG_ASSERT(head != nullptr); |
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TracedBuffer* elem = *head; |
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TracedBuffer* next = nullptr; |
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while (elem != nullptr) { |
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/* The byte number refers to the sequence number of the last byte which this
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* timestamp relates to. */ |
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if (serr->ee_data >= elem->seq_no_) { |
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switch (serr->ee_info) { |
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case SCM_TSTAMP_SCHED: |
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fill_gpr_from_timestamp(&(elem->ts_.scheduled_time), &(tss->ts[0])); |
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elem = elem->next_; |
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break; |
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case SCM_TSTAMP_SND: |
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fill_gpr_from_timestamp(&(elem->ts_.sent_time), &(tss->ts[0])); |
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elem = elem->next_; |
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break; |
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case SCM_TSTAMP_ACK: |
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fill_gpr_from_timestamp(&(elem->ts_.acked_time), &(tss->ts[0])); |
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/* Got all timestamps. Do the callback and free this TracedBuffer.
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* The thing below can be passed by value if we don't want the |
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* restriction on the lifetime. */ |
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timestamps_callback(elem->arg_, &(elem->ts_), GRPC_ERROR_NONE); |
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next = elem->next_; |
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Delete<TracedBuffer>(elem); |
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*head = elem = next; |
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break; |
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default: |
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abort(); |
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} |
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} else { |
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break; |
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} |
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} |
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} |
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void TracedBuffer::Shutdown(TracedBuffer** head, grpc_error* shutdown_err) { |
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GPR_DEBUG_ASSERT(head != nullptr); |
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TracedBuffer* elem = *head; |
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while (elem != nullptr) { |
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if (timestamps_callback) { |
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timestamps_callback(elem->arg_, &(elem->ts_), shutdown_err); |
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} |
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auto* next = elem->next_; |
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Delete<TracedBuffer>(elem); |
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elem = next; |
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} |
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*head = nullptr; |
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GRPC_ERROR_UNREF(shutdown_err); |
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} |
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void grpc_tcp_set_write_timestamps_callback(void (*fn)(void*, |
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grpc_core::Timestamps*, |
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grpc_error* error)) { |
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timestamps_callback = fn; |
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} |
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} /* namespace grpc_core */ |
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#else /* GRPC_LINUX_ERRQUEUE */ |
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namespace grpc_core { |
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void grpc_tcp_set_write_timestamps_callback(void (*fn)(void*, |
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grpc_core::Timestamps*, |
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grpc_error* error)) { |
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gpr_log(GPR_DEBUG, "Timestamps callback is not enabled for this platform"); |
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} |
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} /* namespace grpc_core */ |
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#endif /* GRPC_LINUX_ERRQUEUE */ |
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@ -0,0 +1,96 @@ |
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/*
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* |
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* Copyright 2018 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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#ifndef GRPC_CORE_LIB_IOMGR_BUFFER_LIST_H |
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#define GRPC_CORE_LIB_IOMGR_BUFFER_LIST_H |
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#include <grpc/support/port_platform.h> |
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#include "src/core/lib/iomgr/port.h" |
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#include <grpc/support/time.h> |
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#include "src/core/lib/gprpp/memory.h" |
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#include "src/core/lib/iomgr/error.h" |
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#include "src/core/lib/iomgr/internal_errqueue.h" |
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namespace grpc_core { |
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struct Timestamps { |
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/* TODO(yashykt): This would also need to store OPTSTAT once support is added
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*/ |
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gpr_timespec sendmsg_time; |
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gpr_timespec scheduled_time; |
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gpr_timespec sent_time; |
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gpr_timespec acked_time; |
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}; |
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/** TracedBuffer is a class to keep track of timestamps for a specific buffer in
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* the TCP layer. We are only tracking timestamps for Linux kernels and hence |
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* this class would only be used by Linux platforms. For all other platforms, |
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* TracedBuffer would be an empty class. |
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* |
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* The timestamps collected are according to grpc_core::Timestamps declared |
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* above. |
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* |
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* A TracedBuffer list is kept track of using the head element of the list. If |
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* the head element of the list is nullptr, then the list is empty. |
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*/ |
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#ifdef GRPC_LINUX_ERRQUEUE |
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class TracedBuffer { |
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public: |
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/** Add a new entry in the TracedBuffer list pointed to by head. Also saves
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* sendmsg_time with the current timestamp. */ |
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static void AddNewEntry(grpc_core::TracedBuffer** head, uint32_t seq_no, |
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void* arg); |
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/** Processes a received timestamp based on sock_extended_err and
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* scm_timestamping structures. It will invoke the timestamps callback if the |
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* timestamp type is SCM_TSTAMP_ACK. */ |
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static void ProcessTimestamp(grpc_core::TracedBuffer** head, |
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struct sock_extended_err* serr, |
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struct scm_timestamping* tss); |
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/** Cleans the list by calling the callback for each traced buffer in the list
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* with timestamps that it has. */ |
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static void Shutdown(grpc_core::TracedBuffer** head, |
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grpc_error* shutdown_err); |
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private: |
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GPRC_ALLOW_CLASS_TO_USE_NON_PUBLIC_NEW |
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TracedBuffer(int seq_no, void* arg) |
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: seq_no_(seq_no), arg_(arg), next_(nullptr) {} |
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uint32_t seq_no_; /* The sequence number for the last byte in the buffer */ |
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void* arg_; /* The arg to pass to timestamps_callback */ |
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grpc_core::Timestamps ts_; /* The timestamps corresponding to this buffer */ |
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grpc_core::TracedBuffer* next_; /* The next TracedBuffer in the list */ |
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}; |
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#else /* GRPC_LINUX_ERRQUEUE */ |
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class TracedBuffer {}; |
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#endif /* GRPC_LINUX_ERRQUEUE */ |
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/** Sets the callback function to call when timestamps for a write are
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* collected. The callback does not own a reference to error. */ |
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void grpc_tcp_set_write_timestamps_callback(void (*fn)(void*, |
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grpc_core::Timestamps*, |
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grpc_error* error)); |
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}; /* namespace grpc_core */ |
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#endif /* GRPC_CORE_LIB_IOMGR_BUFFER_LIST_H */ |
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@ -0,0 +1,40 @@ |
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/*
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* |
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* Copyright 2018 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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#include <grpc/support/port_platform.h> |
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#include "src/core/lib/iomgr/port.h" |
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#include "src/core/lib/iomgr/internal_errqueue.h" |
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#ifdef GRPC_POSIX_SOCKET_TCP |
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#ifdef GPR_LINUX |
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#include <linux/version.h> |
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#endif /* GPR_LINUX */ |
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bool kernel_supports_errqueue() { |
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#ifdef LINUX_VERSION_CODE |
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#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 0, 0) |
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return true; |
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#endif /* LINUX_VERSION_CODE <= KERNEL_VERSION(4, 0, 0) */ |
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#endif /* LINUX_VERSION_CODE */ |
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return false; |
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} |
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#endif /* GRPC_POSIX_SOCKET_TCP */ |
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/*
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* |
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* Copyright 2018 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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/* This file contains constants defined in <linux/errqueue.h> and
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* <linux/net_tstamp.h> so as to allow collecting network timestamps in the |
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* kernel. This file allows tcp_posix.cc to compile on platforms that do not |
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* have <linux/errqueue.h> and <linux/net_tstamp.h>. |
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*/ |
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#ifndef GRPC_CORE_LIB_IOMGR_INTERNAL_ERRQUEUE_H |
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#define GRPC_CORE_LIB_IOMGR_INTERNAL_ERRQUEUE_H |
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#include <grpc/support/port_platform.h> |
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#include "src/core/lib/iomgr/port.h" |
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#ifdef GRPC_POSIX_SOCKET_TCP |
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#include <sys/types.h> |
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#include <time.h> |
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#ifdef GRPC_LINUX_ERRQUEUE |
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#include <linux/errqueue.h> |
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#include <linux/net_tstamp.h> |
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#include <sys/socket.h> |
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#endif /* GRPC_LINUX_ERRQUEUE */ |
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namespace grpc_core { |
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#ifdef GRPC_LINUX_ERRQUEUE |
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constexpr uint32_t kTimestampingSocketOptions = SOF_TIMESTAMPING_SOFTWARE | |
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SOF_TIMESTAMPING_OPT_ID | |
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SOF_TIMESTAMPING_OPT_TSONLY; |
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constexpr uint32_t kTimestampingRecordingOptions = |
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SOF_TIMESTAMPING_TX_SCHED | SOF_TIMESTAMPING_TX_SOFTWARE | |
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SOF_TIMESTAMPING_TX_ACK; |
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#endif /* GRPC_LINUX_ERRQUEUE */ |
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/* Returns true if kernel is capable of supporting errqueue and timestamping.
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* Currently allowing only linux kernels above 4.0.0 |
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*/ |
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bool kernel_supports_errqueue(); |
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} // namespace grpc_core
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#endif /* GRPC_POSIX_SOCKET_TCP */ |
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#endif /* GRPC_CORE_LIB_IOMGR_INTERNAL_ERRQUEUE_H */ |
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@ -0,0 +1,111 @@ |
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/*
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* |
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* Copyright 2018 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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#include "src/core/lib/iomgr/port.h" |
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#include "src/core/lib/iomgr/buffer_list.h" |
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#include <grpc/grpc.h> |
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#include "test/core/util/test_config.h" |
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#ifdef GRPC_LINUX_ERRQUEUE |
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static void TestShutdownFlushesListVerifier(void* arg, |
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grpc_core::Timestamps* ts, |
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grpc_error* error) { |
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GPR_ASSERT(error == GRPC_ERROR_NONE); |
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GPR_ASSERT(arg != nullptr); |
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gpr_atm* done = reinterpret_cast<gpr_atm*>(arg); |
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gpr_atm_rel_store(done, static_cast<gpr_atm>(1)); |
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} |
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/** Tests that all TracedBuffer elements in the list are flushed out on
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* shutdown. |
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* Also tests that arg is passed correctly. |
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*/ |
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static void TestShutdownFlushesList() { |
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grpc_core::grpc_tcp_set_write_timestamps_callback( |
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TestShutdownFlushesListVerifier); |
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grpc_core::TracedBuffer* list = nullptr; |
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#define NUM_ELEM 5 |
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gpr_atm verifier_called[NUM_ELEM]; |
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for (auto i = 0; i < NUM_ELEM; i++) { |
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gpr_atm_rel_store(&verifier_called[i], static_cast<gpr_atm>(0)); |
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grpc_core::TracedBuffer::AddNewEntry( |
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&list, i, static_cast<void*>(&verifier_called[i])); |
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} |
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grpc_core::TracedBuffer::Shutdown(&list, GRPC_ERROR_NONE); |
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GPR_ASSERT(list == nullptr); |
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for (auto i = 0; i < NUM_ELEM; i++) { |
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GPR_ASSERT(gpr_atm_acq_load(&verifier_called[i]) == |
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static_cast<gpr_atm>(1)); |
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} |
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} |
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static void TestVerifierCalledOnAckVerifier(void* arg, |
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grpc_core::Timestamps* ts, |
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grpc_error* error) { |
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GPR_ASSERT(error == GRPC_ERROR_NONE); |
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GPR_ASSERT(arg != nullptr); |
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GPR_ASSERT(ts->acked_time.clock_type == GPR_CLOCK_REALTIME); |
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GPR_ASSERT(ts->acked_time.tv_sec == 123); |
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GPR_ASSERT(ts->acked_time.tv_nsec == 456); |
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gpr_atm* done = reinterpret_cast<gpr_atm*>(arg); |
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gpr_atm_rel_store(done, static_cast<gpr_atm>(1)); |
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} |
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/** Tests that the timestamp verifier is called on an ACK timestamp.
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*/ |
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static void TestVerifierCalledOnAck() { |
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struct sock_extended_err serr; |
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serr.ee_data = 213; |
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serr.ee_info = SCM_TSTAMP_ACK; |
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struct scm_timestamping tss; |
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tss.ts[0].tv_sec = 123; |
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tss.ts[0].tv_nsec = 456; |
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grpc_core::grpc_tcp_set_write_timestamps_callback( |
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TestVerifierCalledOnAckVerifier); |
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grpc_core::TracedBuffer* list = nullptr; |
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gpr_atm verifier_called; |
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gpr_atm_rel_store(&verifier_called, static_cast<gpr_atm>(0)); |
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grpc_core::TracedBuffer::AddNewEntry(&list, 213, &verifier_called); |
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grpc_core::TracedBuffer::ProcessTimestamp(&list, &serr, &tss); |
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GPR_ASSERT(gpr_atm_acq_load(&verifier_called) == static_cast<gpr_atm>(1)); |
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GPR_ASSERT(list == nullptr); |
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grpc_core::TracedBuffer::Shutdown(&list, GRPC_ERROR_NONE); |
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} |
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static void TestTcpBufferList() { |
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TestVerifierCalledOnAck(); |
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TestShutdownFlushesList(); |
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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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grpc_init(); |
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TestTcpBufferList(); |
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grpc_shutdown(); |
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return 0; |
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} |
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#else /* GRPC_LINUX_ERRQUEUE */ |
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int main(int argc, char** argv) { return 0; } |
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#endif /* GRPC_LINUX_ERRQUEUE */ |
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