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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.
*
*/
#include <grpc/support/port_platform.h>
#ifdef GRPC_BASIC_PROFILER
#include "src/core/profiling/timers.h"
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
#include <grpc/support/time.h>
#include <grpc/support/sync.h>
#include <grpc/support/thd.h>
#include <stdio.h>
typedef enum { BEGIN = '{', END = '}', MARK = '.' } marker_type;
typedef struct gpr_timer_entry {
gpr_timespec tm;
const char *tagstr;
const char *file;
short line;
char type;
gpr_uint8 important;
} gpr_timer_entry;
#define MAX_COUNT (5 * 1024 * 1024 / sizeof(gpr_timer_entry))
static __thread gpr_timer_entry g_log[MAX_COUNT];
static __thread int g_count;
static gpr_once g_once_init = GPR_ONCE_INIT;
static FILE *output_file;
static void close_output() { fclose(output_file); }
static void init_output() {
output_file = fopen("latency_trace.txt", "w");
GPR_ASSERT(output_file);
atexit(close_output);
}
static void log_report() {
int i;
gpr_once_init(&g_once_init, init_output);
for (i = 0; i < g_count; i++) {
gpr_timer_entry *entry = &(g_log[i]);
fprintf(output_file,
"{\"t\": %ld.%09d, \"thd\": \"%p\", \"type\": \"%c\", \"tag\": "
"\"%s\", \"file\": \"%s\", \"line\": %d, \"imp\": %d}\n",
entry->tm.tv_sec, entry->tm.tv_nsec,
(void *)(gpr_intptr)gpr_thd_currentid(), entry->type, entry->tagstr,
entry->file, entry->line, entry->important);
}
/* Now clear out the log */
g_count = 0;
}
static void gpr_timers_log_add(const char *tagstr, marker_type type,
int important, const char *file, int line) {
gpr_timer_entry *entry;
/* TODO (vpai) : Improve concurrency */
if (g_count == MAX_COUNT) {
log_report();
}
entry = &g_log[g_count++];
entry->tm = gpr_now(GPR_CLOCK_PRECISE);
entry->tagstr = tagstr;
entry->type = type;
entry->file = file;
entry->line = (short)line;
entry->important = important != 0;
}
/* Latency profiler API implementation. */
void gpr_timer_add_mark(const char *tagstr, int important, const char *file,
int line) {
gpr_timers_log_add(tagstr, MARK, important, file, line);
}
void gpr_timer_begin(const char *tagstr, int important, const char *file,
int line) {
gpr_timers_log_add(tagstr, BEGIN, important, file, line);
}
void gpr_timer_end(const char *tagstr, int important, const char *file,
int line) {
gpr_timers_log_add(tagstr, END, important, file, line);
}
/* Basic profiler specific API functions. */
void gpr_timers_global_init(void) {}
void gpr_timers_global_destroy(void) {}
#else /* !GRPC_BASIC_PROFILER */
void gpr_timers_global_init(void) {}
void gpr_timers_global_destroy(void) {}
#endif /* GRPC_BASIC_PROFILER */
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