41522f7442
The leafloop workload is to run an infinite loop in the test_leaf function. This is needed for the ARM fp callgraph test to verify if it gets the correct callchains. $ perf test -w leafloop Committer notes: Add a: -U_FORTIFY_SOURCE to the leafloop 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/20221116233854.1596378-6-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
35 lines
527 B
C
35 lines
527 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <stdlib.h>
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#include <linux/compiler.h>
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#include "../tests.h"
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/* We want to check these symbols in perf script */
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noinline void leaf(volatile int b);
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noinline void parent(volatile int b);
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static volatile int a;
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noinline void leaf(volatile int b)
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{
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for (;;)
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a += b;
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}
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noinline void parent(volatile int b)
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{
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leaf(b);
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}
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static int leafloop(int argc, const char **argv)
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{
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int c = 1;
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if (argc > 0)
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c = atoi(argv[0]);
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parent(c);
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return 0;
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}
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DEFINE_WORKLOAD(leafloop);
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