mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 07:20:11 +00:00
fa9aecc045
Measure duration of 100 fclose calls after opening 1 million FILEs. Signed-off-by: H.J. Lu <hjl.tools@gmail.com> Reviewed-by: Carlos O'Donell <carlos@redhat.com>
76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
/* Benchmark fclose.
|
|
Copyright (C) 2024 Free Software Foundation, Inc.
|
|
Copyright The GNU Toolchain Authors.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include "bench-timing.h"
|
|
#include "json-lib.h"
|
|
|
|
#define NUM_FILES 1000000
|
|
#define NUM_FCLOSE 100
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
json_ctx_t json_ctx;
|
|
json_init (&json_ctx, 0, stdout);
|
|
json_document_begin (&json_ctx);
|
|
|
|
json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
|
|
json_attr_object_begin (&json_ctx, "functions");
|
|
json_attr_object_begin (&json_ctx, "fclose");
|
|
|
|
FILE *ff, *keep[NUM_FCLOSE];
|
|
int i;
|
|
|
|
for (i = 0; i < NUM_FILES; i++)
|
|
{
|
|
ff = fdopen (STDIN_FILENO, "r");
|
|
if (!ff)
|
|
{
|
|
fprintf (stderr, "### failed to fdopen: %m\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
if (i < NUM_FCLOSE)
|
|
keep[i] = ff;
|
|
}
|
|
|
|
timing_t start, stop, elapsed;
|
|
|
|
TIMING_NOW (start);
|
|
|
|
for (i = 0; i < NUM_FCLOSE; i++)
|
|
fclose (keep[i]);
|
|
|
|
TIMING_NOW (stop);
|
|
|
|
TIMING_DIFF (elapsed, start, stop);
|
|
|
|
json_attr_uint (&json_ctx, "number of FILEs", NUM_FILES);
|
|
json_attr_uint (&json_ctx, "number of fclose calls", NUM_FCLOSE);
|
|
json_attr_uint (&json_ctx, "duration", elapsed);
|
|
|
|
json_attr_object_end (&json_ctx);
|
|
json_attr_object_end (&json_ctx);
|
|
json_document_end (&json_ctx);
|
|
|
|
return 0;
|
|
}
|