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a104f0ea99
The brstack is to run different kinds of branches repeatedly. This is necessary for brstack test case to verify if it has correct branch info. $ perf test -w brstack I renamed the internal functions to have brstack_ prefix as it's too generic name. Add a -U_FORTIFY_SOURCE to the brstack CFLAGS, as the main perf flags set it and it requires building with optimization, and this new test has a -O0. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com> Cc: German Gomez <german.gomez@arm.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Leo Yan <leo.yan@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Zhengjun Xing <zhengjun.xing@linux.intel.com> Link: https://lore.kernel.org/r/20221116233854.1596378-10-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
40 lines
751 B
C
40 lines
751 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <stdlib.h>
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#include "../tests.h"
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#define BENCH_RUNS 999999
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static volatile int cnt;
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static void brstack_bar(void) {
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} /* return */
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static void brstack_foo(void) {
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brstack_bar(); /* call */
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} /* return */
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static void brstack_bench(void) {
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void (*brstack_foo_ind)(void) = brstack_foo;
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if ((cnt++) % 3) /* branch (cond) */
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brstack_foo(); /* call */
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brstack_bar(); /* call */
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brstack_foo_ind(); /* call (ind) */
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}
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static int brstack(int argc, const char **argv)
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{
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int num_loops = BENCH_RUNS;
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if (argc > 0)
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num_loops = atoi(argv[0]);
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while (1) {
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if ((cnt++) > num_loops)
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break;
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brstack_bench();/* call */
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} /* branch (uncond) */
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return 0;
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}
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DEFINE_WORKLOAD(brstack);
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