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@ -22,6 +22,7 @@ |
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#include <grpc/support/log.h> |
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#include "src/core/lib/gprpp/sync.h" |
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#include "src/core/lib/iomgr/port.h" |
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#ifdef GRPC_LINUX_ERRQUEUE |
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@ -29,72 +30,70 @@ |
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#include <string.h> |
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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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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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// Fills gpr_timespec gts based on values from timespec ts.
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void FillGprFromTimestamp(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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void default_timestamps_callback(void* /*arg*/, Timestamps* /*ts*/, |
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grpc_error_handle /*shudown_err*/) { |
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void DefaultTimestampsCallback(void* /*arg*/, Timestamps* /*ts*/, |
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absl::Status /*shudown_err*/) { |
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gpr_log(GPR_DEBUG, "Timestamps callback has not been registered"); |
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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*, Timestamps*, |
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grpc_error_handle shutdown_err) = |
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default_timestamps_callback; |
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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 (*g_timestamps_callback)(void*, Timestamps*, |
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grpc_error_handle shutdown_err) = |
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DefaultTimestampsCallback; |
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/* Used to extract individual opt stats from cmsg, so as to avoid troubles with
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* unaligned reads */ |
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// Used to extract individual opt stats from cmsg, so as to avoid troubles with
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// unaligned reads.
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template <typename T> |
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T read_unaligned(const void* ptr) { |
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T ReadUnaligned(const void* ptr) { |
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T val; |
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memcpy(&val, ptr, sizeof(val)); |
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return val; |
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} |
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/* Extracts opt stats from the tcp_info struct \a info to \a metrics */ |
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void extract_opt_stats_from_tcp_info(ConnectionMetrics* metrics, |
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const tcp_info* info) { |
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// Extracts opt stats from the tcp_info struct \a info to \a metrics
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void ExtractOptStatsFromTcpInfo(ConnectionMetrics* metrics, |
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const tcp_info* info) { |
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if (info == nullptr) { |
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return; |
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} |
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if (info->length > offsetof(tcp_info, tcpi_sndbuf_limited)) { |
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metrics->recurring_retrans.emplace(info->tcpi_retransmits); |
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metrics->is_delivery_rate_app_limited.emplace( |
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info->tcpi_delivery_rate_app_limited); |
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metrics->congestion_window.emplace(info->tcpi_snd_cwnd); |
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metrics->reordering.emplace(info->tcpi_reordering); |
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metrics->packet_retx.emplace(info->tcpi_total_retrans); |
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metrics->pacing_rate.emplace(info->tcpi_pacing_rate); |
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metrics->data_notsent.emplace(info->tcpi_notsent_bytes); |
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metrics->recurring_retrans = info->tcpi_retransmits; |
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metrics->is_delivery_rate_app_limited = |
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info->tcpi_delivery_rate_app_limited; |
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metrics->congestion_window = info->tcpi_snd_cwnd; |
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metrics->reordering = info->tcpi_reordering; |
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metrics->packet_retx = info->tcpi_total_retrans; |
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metrics->pacing_rate = info->tcpi_pacing_rate; |
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metrics->data_notsent = info->tcpi_notsent_bytes; |
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if (info->tcpi_min_rtt != UINT32_MAX) { |
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metrics->min_rtt.emplace(info->tcpi_min_rtt); |
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metrics->min_rtt = info->tcpi_min_rtt; |
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} |
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metrics->packet_sent.emplace(info->tcpi_data_segs_out); |
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metrics->delivery_rate.emplace(info->tcpi_delivery_rate); |
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metrics->busy_usec.emplace(info->tcpi_busy_time); |
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metrics->rwnd_limited_usec.emplace(info->tcpi_rwnd_limited); |
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metrics->sndbuf_limited_usec.emplace(info->tcpi_sndbuf_limited); |
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metrics->packet_sent = info->tcpi_data_segs_out; |
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metrics->delivery_rate = info->tcpi_delivery_rate; |
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metrics->busy_usec = info->tcpi_busy_time; |
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metrics->rwnd_limited_usec = info->tcpi_rwnd_limited; |
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metrics->sndbuf_limited_usec = info->tcpi_sndbuf_limited; |
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} |
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if (info->length > offsetof(tcp_info, tcpi_dsack_dups)) { |
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metrics->data_sent.emplace(info->tcpi_bytes_sent); |
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metrics->data_retx.emplace(info->tcpi_bytes_retrans); |
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metrics->packet_spurious_retx.emplace(info->tcpi_dsack_dups); |
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metrics->data_sent = info->tcpi_bytes_sent; |
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metrics->data_retx = info->tcpi_bytes_retrans; |
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metrics->packet_spurious_retx = info->tcpi_dsack_dups; |
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} |
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} |
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/** Extracts opt stats from the given control message \a opt_stats to the
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* connection metrics \a metrics */ |
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void extract_opt_stats_from_cmsg(ConnectionMetrics* metrics, |
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const cmsghdr* opt_stats) { |
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// Extracts opt stats from the given control message \a opt_stats to the
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// connection metrics \a metrics.
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void ExtractOptStatsFromCmsg(ConnectionMetrics* metrics, |
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const cmsghdr* opt_stats) { |
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if (opt_stats == nullptr) { |
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return; |
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} |
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@ -108,80 +107,79 @@ void extract_opt_stats_from_cmsg(ConnectionMetrics* metrics, |
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const void* val = data + offset + NLA_HDRLEN; |
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switch (attr->nla_type) { |
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case TCP_NLA_BUSY: { |
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metrics->busy_usec.emplace(read_unaligned<uint64_t>(val)); |
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metrics->busy_usec = ReadUnaligned<uint64_t>(val); |
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break; |
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} |
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case TCP_NLA_RWND_LIMITED: { |
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metrics->rwnd_limited_usec.emplace(read_unaligned<uint64_t>(val)); |
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metrics->rwnd_limited_usec = ReadUnaligned<uint64_t>(val); |
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break; |
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} |
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case TCP_NLA_SNDBUF_LIMITED: { |
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metrics->sndbuf_limited_usec.emplace(read_unaligned<uint64_t>(val)); |
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metrics->sndbuf_limited_usec = ReadUnaligned<uint64_t>(val); |
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break; |
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} |
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case TCP_NLA_PACING_RATE: { |
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metrics->pacing_rate.emplace(read_unaligned<uint64_t>(val)); |
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metrics->pacing_rate = ReadUnaligned<uint64_t>(val); |
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break; |
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} |
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case TCP_NLA_DELIVERY_RATE: { |
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metrics->delivery_rate.emplace(read_unaligned<uint64_t>(val)); |
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metrics->delivery_rate = ReadUnaligned<uint64_t>(val); |
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break; |
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} |
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case TCP_NLA_DELIVERY_RATE_APP_LMT: { |
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metrics->is_delivery_rate_app_limited.emplace( |
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read_unaligned<uint8_t>(val)); |
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metrics->is_delivery_rate_app_limited = ReadUnaligned<uint8_t>(val); |
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break; |
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} |
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case TCP_NLA_SND_CWND: { |
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metrics->congestion_window.emplace(read_unaligned<uint32_t>(val)); |
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metrics->congestion_window = ReadUnaligned<uint32_t>(val); |
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break; |
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} |
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case TCP_NLA_MIN_RTT: { |
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metrics->min_rtt.emplace(read_unaligned<uint32_t>(val)); |
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metrics->min_rtt = ReadUnaligned<uint32_t>(val); |
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break; |
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} |
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case TCP_NLA_SRTT: { |
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metrics->srtt.emplace(read_unaligned<uint32_t>(val)); |
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metrics->srtt = ReadUnaligned<uint32_t>(val); |
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break; |
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} |
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case TCP_NLA_RECUR_RETRANS: { |
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metrics->recurring_retrans.emplace(read_unaligned<uint8_t>(val)); |
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metrics->recurring_retrans = ReadUnaligned<uint8_t>(val); |
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break; |
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} |
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case TCP_NLA_BYTES_SENT: { |
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metrics->data_sent.emplace(read_unaligned<uint64_t>(val)); |
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metrics->data_sent = ReadUnaligned<uint64_t>(val); |
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break; |
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} |
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case TCP_NLA_DATA_SEGS_OUT: { |
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metrics->packet_sent.emplace(read_unaligned<uint64_t>(val)); |
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metrics->packet_sent = ReadUnaligned<uint64_t>(val); |
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break; |
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} |
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case TCP_NLA_TOTAL_RETRANS: { |
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metrics->packet_retx.emplace(read_unaligned<uint64_t>(val)); |
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metrics->packet_retx = ReadUnaligned<uint64_t>(val); |
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break; |
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} |
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case TCP_NLA_DELIVERED: { |
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metrics->packet_delivered.emplace(read_unaligned<uint32_t>(val)); |
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metrics->packet_delivered = ReadUnaligned<uint32_t>(val); |
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break; |
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} |
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case TCP_NLA_DELIVERED_CE: { |
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metrics->packet_delivered_ce.emplace(read_unaligned<uint32_t>(val)); |
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metrics->packet_delivered_ce = ReadUnaligned<uint32_t>(val); |
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break; |
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} |
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case TCP_NLA_BYTES_RETRANS: { |
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metrics->data_retx.emplace(read_unaligned<uint64_t>(val)); |
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metrics->data_retx = ReadUnaligned<uint64_t>(val); |
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break; |
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} |
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case TCP_NLA_DSACK_DUPS: { |
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metrics->packet_spurious_retx.emplace(read_unaligned<uint32_t>(val)); |
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metrics->packet_spurious_retx = ReadUnaligned<uint32_t>(val); |
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break; |
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} |
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case TCP_NLA_REORDERING: { |
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metrics->reordering.emplace(read_unaligned<uint32_t>(val)); |
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metrics->reordering = ReadUnaligned<uint32_t>(val); |
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break; |
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} |
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case TCP_NLA_SND_SSTHRESH: { |
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metrics->snd_ssthresh.emplace(read_unaligned<uint32_t>(val)); |
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metrics->snd_ssthresh = ReadUnaligned<uint32_t>(val); |
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break; |
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} |
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} |
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@ -189,75 +187,68 @@ void extract_opt_stats_from_cmsg(ConnectionMetrics* metrics, |
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} |
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} |
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int get_socket_tcp_info(tcp_info* info, int fd) { |
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int GetSocketTcpInfo(struct tcp_info* info, int fd) { |
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memset(info, 0, sizeof(*info)); |
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info->length = offsetof(tcp_info, length); |
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return getsockopt(fd, IPPROTO_TCP, TCP_INFO, info, &(info->length)); |
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} |
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} /* namespace */ |
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void TracedBuffer::AddNewEntry(TracedBuffer** head, uint32_t seq_no, int fd, |
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void* arg) { |
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GPR_DEBUG_ASSERT(head != nullptr); |
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} // namespace.
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void TracedBufferList::AddNewEntry(int32_t seq_no, int fd, void* arg) { |
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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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// Store the current time as the sendmsg time.
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new_elem->ts_.sendmsg_time.time = gpr_now(GPR_CLOCK_REALTIME); |
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new_elem->ts_.scheduled_time.time = gpr_inf_past(GPR_CLOCK_REALTIME); |
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new_elem->ts_.sent_time.time = gpr_inf_past(GPR_CLOCK_REALTIME); |
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new_elem->ts_.acked_time.time = gpr_inf_past(GPR_CLOCK_REALTIME); |
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if (get_socket_tcp_info(&new_elem->ts_.info, fd) == 0) { |
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extract_opt_stats_from_tcp_info(&new_elem->ts_.sendmsg_time.metrics, |
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&new_elem->ts_.info); |
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if (GetSocketTcpInfo(&(new_elem->ts_.info), fd) == 0) { |
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ExtractOptStatsFromTcpInfo(&(new_elem->ts_.sendmsg_time.metrics), |
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&(new_elem->ts_.info)); |
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} |
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if (*head == nullptr) { |
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*head = new_elem; |
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return; |
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MutexLock lock(&mu_); |
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if (!head_) { |
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head_ = tail_ = new_elem; |
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} else { |
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tail_->next_ = new_elem; |
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tail_ = new_elem; |
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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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void TracedBuffer::ProcessTimestamp(TracedBuffer** head, |
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struct sock_extended_err* serr, |
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struct cmsghdr* opt_stats, |
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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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void TracedBufferList::ProcessTimestamp(struct sock_extended_err* serr, |
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struct cmsghdr* opt_stats, |
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struct scm_timestamping* tss) { |
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MutexLock lock(&mu_); |
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TracedBuffer* elem = head_; |
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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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// 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.time), |
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&(tss->ts[0])); |
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extract_opt_stats_from_cmsg(&(elem->ts_.scheduled_time.metrics), |
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opt_stats); |
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FillGprFromTimestamp(&(elem->ts_.scheduled_time.time), &(tss->ts[0])); |
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ExtractOptStatsFromCmsg(&(elem->ts_.scheduled_time.metrics), |
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opt_stats); |
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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.time), &(tss->ts[0])); |
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extract_opt_stats_from_cmsg(&(elem->ts_.sent_time.metrics), |
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opt_stats); |
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FillGprFromTimestamp(&(elem->ts_.sent_time.time), &(tss->ts[0])); |
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ExtractOptStatsFromCmsg(&(elem->ts_.sent_time.metrics), opt_stats); |
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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.time), &(tss->ts[0])); |
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extract_opt_stats_from_cmsg(&(elem->ts_.acked_time.metrics), |
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opt_stats); |
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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_), absl::OkStatus()); |
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next = elem->next_; |
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delete static_cast<TracedBuffer*>(elem); |
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|
*head = elem = next; |
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FillGprFromTimestamp(&(elem->ts_.acked_time.time), &(tss->ts[0])); |
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|
ExtractOptStatsFromCmsg(&(elem->ts_.acked_time.metrics), opt_stats); |
|
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|
|
// Got all timestamps. Do the callback and free this TracedBuffer. The
|
|
|
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|
// thing below can be passed by value if we don't want the restriction
|
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|
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|
// on the lifetime.
|
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|
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|
g_timestamps_callback(elem->arg_, &(elem->ts_), absl::OkStatus()); |
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|
// Safe to update head_ to elem->next_ because the list is ordered by
|
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|
|
// seq_no. Thus if elem is to be deleted, it has to be the first
|
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|
// element in the list.
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|
head_ = elem->next_; |
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|
delete elem; |
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|
elem = head_; |
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|
break; |
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default: |
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|
abort(); |
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@ -266,27 +257,26 @@ void TracedBuffer::ProcessTimestamp(TracedBuffer** head, |
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break; |
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} |
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} |
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|
tail_ = !head_ ? head_ : tail_; |
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|
} |
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void TracedBuffer::Shutdown(TracedBuffer** head, void* remaining, |
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|
|
grpc_error_handle 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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|
|
timestamps_callback(elem->arg_, &(elem->ts_), shutdown_err); |
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|
auto* next = elem->next_; |
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|
|
void TracedBufferList::Shutdown(void* remaining, absl::Status shutdown_err) { |
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|
|
MutexLock lock(&mu_); |
|
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|
|
while (head_) { |
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|
|
TracedBuffer* elem = head_; |
|
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|
|
g_timestamps_callback(elem->arg_, &(elem->ts_), shutdown_err); |
|
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|
|
head_ = head_->next_; |
|
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|
|
delete elem; |
|
|
|
|
elem = next; |
|
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|
|
} |
|
|
|
|
*head = nullptr; |
|
|
|
|
if (remaining != nullptr) { |
|
|
|
|
timestamps_callback(remaining, nullptr, shutdown_err); |
|
|
|
|
g_timestamps_callback(remaining, nullptr, shutdown_err); |
|
|
|
|
} |
|
|
|
|
tail_ = head_; |
|
|
|
|
} |
|
|
|
|
|
|
|
|
|
void grpc_tcp_set_write_timestamps_callback( |
|
|
|
|
void (*fn)(void*, Timestamps*, grpc_error_handle error)) { |
|
|
|
|
timestamps_callback = fn; |
|
|
|
|
g_timestamps_callback = fn; |
|
|
|
|
} |
|
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|
|
} /* namespace grpc_core */ |
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|
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|
|
@ -301,6 +291,6 @@ void grpc_tcp_set_write_timestamps_callback( |
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|
|
(void)fn; |
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|
|
gpr_log(GPR_DEBUG, "Timestamps callback is not enabled for this platform"); |
|
|
|
|
} |
|
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|
|
} /* namespace grpc_core */ |
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|
} // namespace grpc_core
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#endif /* GRPC_LINUX_ERRQUEUE */ |
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Vignesh Babu
2 years ago
committed by
GitHub