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* [glibc] benchtests: Add fclose benchmark
@ 2024-05-16 15:14 H.J. Lu
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From: H.J. Lu @ 2024-05-16 15:14 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=fa9aecc045e9e7d0c2f4e182748491f732e63dd2
commit fa9aecc045e9e7d0c2f4e182748491f732e63dd2
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Thu May 16 08:08:42 2024 -0700
benchtests: Add fclose benchmark
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>
Diff:
---
benchtests/Makefile | 6 ++++
benchtests/README | 1 +
benchtests/bench-fclose.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 82 insertions(+)
diff --git a/benchtests/Makefile b/benchtests/Makefile
index 7e73b8504e..b74b5fe1ad 100644
--- a/benchtests/Makefile
+++ b/benchtests/Makefile
@@ -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 \
diff --git a/benchtests/README b/benchtests/README
index 998ba9b2b4..15d014a407 100644
--- a/benchtests/README
+++ b/benchtests/README
@@ -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
diff --git a/benchtests/bench-fclose.c b/benchtests/bench-fclose.c
new file mode 100644
index 0000000000..5f1c103d4f
--- /dev/null
+++ b/benchtests/bench-fclose.c
@@ -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;
+}
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