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perf test workload: Add inlineloop test workload

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The purpose of this workload is to gather samples in an inlined
function. This can be used to test whether inlined addr2line works
correctly.

Committer testing:

  $ perf record perf test -w inlineloop 1
  [ perf record: Woken up 2 times to write data ]
  [ perf record: Captured and wrote 0.161 MB perf.data (4005 samples) ]
  $ perf report --stdio --dso perf -s srcfile,srcline
  #
  # Total Lost Samples: 0
  #
  # Samples: 4K of event 'cpu/cycles/Pu'
  # Event count (approx.): 5535180842
  #
  # Overhead  Source File   Source:Line
  # ........  ............  ...............
  #
      99.04%  inlineloop.c  inlineloop.c:21
       0.46%  inlineloop.c  inlineloop.c:20
  #
  $

Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Ian Rogers <irogers@google.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Cc: Tony Jones <tonyj@suse.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers
2026-01-10 20:13:37 -08:00
committed by Arnaldo Carvalho de Melo
parent f815fc0c66
commit 27fc6f565d
4 changed files with 56 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
tools/perf/tests/builtin-test.c
View File

@@ -153,6 +153,7 @@ static struct test_workload *workloads[] = {
&workload__datasym,
&workload__landlock,
&workload__traploop,
&workload__inlineloop,
};
#define workloads__for_each(workload) \

1
tools/perf/tests/tests.h
View File

@@ -240,6 +240,7 @@ DECLARE_WORKLOAD(brstack);
DECLARE_WORKLOAD(datasym);
DECLARE_WORKLOAD(landlock);
DECLARE_WORKLOAD(traploop);
DECLARE_WORKLOAD(inlineloop);
extern const char *dso_to_test;
extern const char *test_objdump_path;

2
tools/perf/tests/workloads/Build
View File

@@ -8,9 +8,11 @@ perf-test-y += brstack.o
perf-test-y += datasym.o
perf-test-y += landlock.o
perf-test-y += traploop.o
perf-test-y += inlineloop.o
CFLAGS_sqrtloop.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
CFLAGS_leafloop.o = -g -O0 -fno-inline -fno-omit-frame-pointer -U_FORTIFY_SOURCE
CFLAGS_brstack.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
CFLAGS_datasym.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
CFLAGS_traploop.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
CFLAGS_inlineloop.o = -g -O2

52
tools/perf/tests/workloads/inlineloop.c Normal file
View File

@@ -0,0 +1,52 @@
// SPDX-License-Identifier: GPL-2.0
#include <pthread.h>
#include <stdlib.h>
#include <signal.h>
#include <unistd.h>
#include <linux/compiler.h>
#include "../tests.h"
static volatile int a;
static volatile sig_atomic_t done;
static void sighandler(int sig __maybe_unused)
{
done = 1;
}
static inline void __attribute__((always_inline)) leaf(int b)
{
again:
a += b;
if (!done)
goto again;
}
static inline void __attribute__((always_inline)) middle(int b)
{
leaf(b);
}
static noinline void parent(int b)
{
middle(b);
}
static int inlineloop(int argc, const char **argv)
{
int sec = 1;
pthread_setname_np(pthread_self(), "perf-inlineloop");
if (argc > 0)
sec = atoi(argv[0]);
signal(SIGINT, sighandler);
signal(SIGALRM, sighandler);
alarm(sec);
parent(sec);
return 0;
}
DEFINE_WORKLOAD(inlineloop);