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/*
*
* 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 "src/core/profiling/timers.h"
#include "src/core/profiling/timers_preciseclock.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 {
grpc_precise_clock tm;
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;
};
grpc_timers_log* grpc_timers_log_global = NULL;
grpc_timers_log* grpc_timers_log_create(int capacity_limit, FILE* dump) {
grpc_timers_log* log = gpr_malloc(sizeof(*log));
/* TODO (vpai): Allow allocation below limit */
log->log = gpr_malloc(capacity_limit * sizeof(*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;
return log;
}
static void log_report_locked(grpc_timers_log* log) {
FILE* fp = log->fp;
int i;
for (i = 0; i < log->num_entries; i++) {
grpc_timer_entry* entry = &(log->log[i]);
fprintf(fp, "GRPC_LAT_PROF ");
grpc_precise_clock_print(&entry->tm, fp);
fprintf(fp, " %s#%d,%s:%d\n", 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++];
grpc_precise_clock_now(&entry->tm);
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);
}
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 */
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