| /* |
| * |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #ifdef GRPC_LATENCY_PROFILER |
| |
| #include "timers.h" |
| |
| #include <grpc/support/alloc.h> |
| #include <grpc/support/log.h> |
| #include <grpc/support/time.h> |
| #include <grpc/support/sync.h> |
| #include <stdio.h> |
| |
| typedef struct grpc_timer_entry { |
| #ifdef GRPC_TIMERS_RDTSC |
| #error Rdtsc timers not supported yet |
| /* TODO(vpai): Fill in rdtsc support if desired */ |
| #else |
| gpr_timespec timer; |
| #endif |
| const char* tag; |
| int seq; |
| const char* file; |
| int line; |
| } grpc_timer_entry; |
| |
| struct grpc_timers_log { |
| gpr_mu mu; |
| grpc_timer_entry* log; |
| int num_entries; |
| int capacity; |
| int capacity_limit; |
| FILE *fp; |
| const char *fmt; |
| }; |
| |
| grpc_timers_log* grpc_timers_log_global = NULL; |
| |
| static int timer_now(grpc_timer_entry *tm) { |
| #ifdef GRPC_TIMERS_RDTSC |
| #error Rdtsc not supported yet |
| #else |
| tm->timer = gpr_now(); |
| return(1); |
| #endif |
| } |
| |
| grpc_timers_log* grpc_timers_log_create(int capacity_limit, FILE *dump, |
| const char *fmt) { |
| grpc_timers_log* log = gpr_malloc(sizeof(*log)); |
| GPR_ASSERT(log); |
| |
| /* TODO (vpai): Allow allocation below limit */ |
| log->log = gpr_malloc(capacity_limit*sizeof(*log->log)); |
| GPR_ASSERT(log->log); |
| |
| /* TODO (vpai): Improve concurrency, do per-thread logging? */ |
| gpr_mu_init(&log->mu); |
| |
| log->num_entries = 0; |
| log->capacity = log->capacity_limit = capacity_limit; |
| |
| log->fp = dump; |
| log->fmt = fmt; |
| |
| return log; |
| } |
| |
| static void log_report_locked(grpc_timers_log *log) { |
| FILE *fp = log->fp; |
| const char *fmt = log->fmt; |
| int i; |
| for (i=0;i<log->num_entries;i++) { |
| grpc_timer_entry* entry = &(log->log[i]); |
| fprintf(fp, fmt, |
| #ifdef GRPC_TIMERS_RDTSC |
| #error Rdtsc not supported |
| #else |
| entry->timer.tv_sec, entry->timer.tv_nsec, |
| #endif |
| entry->tag, entry->seq, entry->file, entry->line); |
| } |
| |
| /* Now clear out the log */ |
| log->num_entries=0; |
| } |
| |
| void grpc_timers_log_destroy(grpc_timers_log *log) { |
| gpr_mu_lock(&log->mu); |
| log_report_locked(log); |
| gpr_mu_unlock(&log->mu); |
| |
| gpr_free(log->log); |
| gpr_mu_destroy(&log->mu); |
| |
| gpr_free(log); |
| } |
| |
| void grpc_timers_log_add(grpc_timers_log *log, const char *tag, int seq, |
| const char *file, int line) { |
| grpc_timer_entry* entry; |
| |
| /* TODO (vpai) : Improve concurrency */ |
| gpr_mu_lock(&log->mu); |
| if (log->num_entries == log->capacity_limit) { |
| log_report_locked(log); |
| } |
| |
| entry = &log->log[log->num_entries++]; |
| |
| timer_now(entry); |
| entry->tag = tag; |
| entry->seq = seq; |
| entry->file = file; |
| entry->line = line; |
| |
| gpr_mu_unlock(&log->mu); |
| } |
| |
| void grpc_timers_log_global_init(void) { |
| grpc_timers_log_global = |
| grpc_timers_log_create(100000, stdout, |
| #ifdef GRPC_TIMERS_RDTSC |
| #error Rdtsc not supported |
| #else |
| "TIMER %1$ld.%2$09d %3$s seq %4$d @ %5$s:%6$d\n" |
| #endif |
| ); |
| /* Use positional arguments as an example for others to change fmt */ |
| } |
| |
| void grpc_timers_log_global_destroy(void) { |
| grpc_timers_log_destroy(grpc_timers_log_global); |
| } |
| |
| #else /* !GRPC_LATENCY_PROFILER */ |
| void grpc_timers_log_global_init(void) { |
| } |
| void grpc_timers_log_global_destroy(void) { |
| } |
| #endif /* GRPC_LATENCY_PROFILER */ |