linux/tools/perf/builtin-bench.c
Irina Tirdea 1d037ca164 perf tools: Use __maybe_used for unused variables
perf defines both __used and __unused variables to use for marking
unused variables. The variable __used is defined to
__attribute__((__unused__)), which contradicts the kernel definition to
__attribute__((__used__)) for new gcc versions. On Android, __used is
also defined in system headers and this leads to warnings like: warning:
'__used__' attribute ignored

__unused is not defined in the kernel and is not a standard definition.
If __unused is included everywhere instead of __used, this leads to
conflicts with glibc headers, since glibc has a variables with this name
in its headers.

The best approach is to use __maybe_unused, the definition used in the
kernel for __attribute__((unused)). In this way there is only one
definition in perf sources (instead of 2 definitions that point to the
same thing: __used and __unused) and it works on both Linux and Android.
This patch simply replaces all instances of __used and __unused with
__maybe_unused.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Acked-by: Pekka Enberg <penberg@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1347315303-29906-7-git-send-email-irina.tirdea@intel.com
[ committer note: fixed up conflict with a116e05 in builtin-sched.c ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2012-09-11 12:19:15 -03:00

248 lines
4.9 KiB
C

/*
*
* builtin-bench.c
*
* General benchmarking subsystem provided by perf
*
* Copyright (C) 2009, Hitoshi Mitake <mitake@dcl.info.waseda.ac.jp>
*
*/
/*
*
* Available subsystem list:
* sched ... scheduler and IPC mechanism
* mem ... memory access performance
*
*/
#include "perf.h"
#include "util/util.h"
#include "util/parse-options.h"
#include "builtin.h"
#include "bench/bench.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct bench_suite {
const char *name;
const char *summary;
int (*fn)(int, const char **, const char *);
};
\
/* sentinel: easy for help */
#define suite_all { "all", "Test all benchmark suites", NULL }
static struct bench_suite sched_suites[] = {
{ "messaging",
"Benchmark for scheduler and IPC mechanisms",
bench_sched_messaging },
{ "pipe",
"Flood of communication over pipe() between two processes",
bench_sched_pipe },
suite_all,
{ NULL,
NULL,
NULL }
};
static struct bench_suite mem_suites[] = {
{ "memcpy",
"Simple memory copy in various ways",
bench_mem_memcpy },
{ "memset",
"Simple memory set in various ways",
bench_mem_memset },
suite_all,
{ NULL,
NULL,
NULL }
};
struct bench_subsys {
const char *name;
const char *summary;
struct bench_suite *suites;
};
static struct bench_subsys subsystems[] = {
{ "sched",
"scheduler and IPC mechanism",
sched_suites },
{ "mem",
"memory access performance",
mem_suites },
{ "all", /* sentinel: easy for help */
"all benchmark subsystem",
NULL },
{ NULL,
NULL,
NULL }
};
static void dump_suites(int subsys_index)
{
int i;
printf("# List of available suites for %s...\n\n",
subsystems[subsys_index].name);
for (i = 0; subsystems[subsys_index].suites[i].name; i++)
printf("%14s: %s\n",
subsystems[subsys_index].suites[i].name,
subsystems[subsys_index].suites[i].summary);
printf("\n");
return;
}
static const char *bench_format_str;
int bench_format = BENCH_FORMAT_DEFAULT;
static const struct option bench_options[] = {
OPT_STRING('f', "format", &bench_format_str, "default",
"Specify format style"),
OPT_END()
};
static const char * const bench_usage[] = {
"perf bench [<common options>] <subsystem> <suite> [<options>]",
NULL
};
static void print_usage(void)
{
int i;
printf("Usage: \n");
for (i = 0; bench_usage[i]; i++)
printf("\t%s\n", bench_usage[i]);
printf("\n");
printf("# List of available subsystems...\n\n");
for (i = 0; subsystems[i].name; i++)
printf("%14s: %s\n",
subsystems[i].name, subsystems[i].summary);
printf("\n");
}
static int bench_str2int(const char *str)
{
if (!str)
return BENCH_FORMAT_DEFAULT;
if (!strcmp(str, BENCH_FORMAT_DEFAULT_STR))
return BENCH_FORMAT_DEFAULT;
else if (!strcmp(str, BENCH_FORMAT_SIMPLE_STR))
return BENCH_FORMAT_SIMPLE;
return BENCH_FORMAT_UNKNOWN;
}
static void all_suite(struct bench_subsys *subsys) /* FROM HERE */
{
int i;
const char *argv[2];
struct bench_suite *suites = subsys->suites;
argv[1] = NULL;
/*
* TODO:
* preparing preset parameters for
* embedded, ordinary PC, HPC, etc...
* will be helpful
*/
for (i = 0; suites[i].fn; i++) {
printf("# Running %s/%s benchmark...\n",
subsys->name,
suites[i].name);
argv[1] = suites[i].name;
suites[i].fn(1, argv, NULL);
printf("\n");
}
}
static void all_subsystem(void)
{
int i;
for (i = 0; subsystems[i].suites; i++)
all_suite(&subsystems[i]);
}
int cmd_bench(int argc, const char **argv, const char *prefix __maybe_unused)
{
int i, j, status = 0;
if (argc < 2) {
/* No subsystem specified. */
print_usage();
goto end;
}
argc = parse_options(argc, argv, bench_options, bench_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
bench_format = bench_str2int(bench_format_str);
if (bench_format == BENCH_FORMAT_UNKNOWN) {
printf("Unknown format descriptor:%s\n", bench_format_str);
goto end;
}
if (argc < 1) {
print_usage();
goto end;
}
if (!strcmp(argv[0], "all")) {
all_subsystem();
goto end;
}
for (i = 0; subsystems[i].name; i++) {
if (strcmp(subsystems[i].name, argv[0]))
continue;
if (argc < 2) {
/* No suite specified. */
dump_suites(i);
goto end;
}
if (!strcmp(argv[1], "all")) {
all_suite(&subsystems[i]);
goto end;
}
for (j = 0; subsystems[i].suites[j].name; j++) {
if (strcmp(subsystems[i].suites[j].name, argv[1]))
continue;
if (bench_format == BENCH_FORMAT_DEFAULT)
printf("# Running %s/%s benchmark...\n",
subsystems[i].name,
subsystems[i].suites[j].name);
status = subsystems[i].suites[j].fn(argc - 1,
argv + 1, prefix);
goto end;
}
if (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")) {
dump_suites(i);
goto end;
}
printf("Unknown suite:%s for %s\n", argv[1], argv[0]);
status = 1;
goto end;
}
printf("Unknown subsystem:%s\n", argv[0]);
status = 1;
end:
return status;
}