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benchtests: Add fclose benchmark

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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>
This commit is contained in:
H.J. Lu 2024-05-16 08:08:42 -07:00
parent 75207bde68
commit fa9aecc045
3 changed files with 82 additions and 0 deletions
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6
benchtests/Makefile
View File

@ -261,6 +261,10 @@ stdlib-benchset := \
strtod \
# stdlib-benchset
stdio-benchset := \
fclose \
# stdio-benchset
stdio-common-benchset := sprintf
math-benchset := math-inlines
@ -269,6 +273,7 @@ ifeq (${BENCHSET},)
benchset := \
$(hash-benchset) \
$(math-benchset) \
$(stdio-benchset) \
$(stdio-common-benchset) \
$(stdlib-benchset) \
$(string-benchset-all) \
@ -419,6 +424,7 @@ VALIDBENCHSETNAMES := \
malloc-simple \
malloc-thread \
math-benchset \
stdio-benchset \
stdio-common-benchset \
stdlib-benchset \
string-benchset \

1
benchtests/README
View File

@ -87,6 +87,7 @@ where BENCHSET may be a space-separated list of the following values:
hash-benchset
malloc-thread
math-benchset
stdio-benchset
stdio-common-benchset
stdlib-benchset
string-benchset

75
benchtests/bench-fclose.c Normal file
View File

@ -0,0 +1,75 @@
/* 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;
}