From 7d60fa2cde0d3d80c55492f86a2a944da7510a67 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Tue, 4 Oct 2022 13:02:11 -0700
Subject: [PATCH] perf mem: Fix -C option behavior for perf mem record
The -C/--cpu option was maily for report but it also affected record as
it ate the option. So users needed to use "--" after perf mem record to
pass the info to the perf record properly.
Check if this option is set for record, and pass it to the actual perf
record.
Before)
$ sudo perf --debug perf-event-open mem record -C 0 2>&1 | grep -a sys_perf_event_open
...
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 4
sys_perf_event_open: pid -1 cpu 1 group_fd -1 flags 0x8 = 5
sys_perf_event_open: pid -1 cpu 2 group_fd -1 flags 0x8 = 6
sys_perf_event_open: pid -1 cpu 3 group_fd -1 flags 0x8 = 7
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 8
sys_perf_event_open: pid -1 cpu 1 group_fd -1 flags 0x8 = 9
sys_perf_event_open: pid -1 cpu 2 group_fd -1 flags 0x8 = 10
sys_perf_event_open: pid -1 cpu 3 group_fd -1 flags 0x8 = 11
...
After)
$ sudo perf --debug perf-event-open mem record -C 0 2>&1 | grep -a sys_perf_event_open
...
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 4
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 5
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 6
sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 7
Reported-by: Ravi Bangoria <ravi.bangoria@amd.com>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Leo Yan <leo.yan@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20221004200211.1444521-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-mem.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index f7dd8216de72e..923fb8316fdae 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -97,6 +97,9 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
else
rec_argc = argc + 9 * perf_pmu__hybrid_pmu_num();
+ if (mem->cpu_list)
+ rec_argc += 2;
+
rec_argv = calloc(rec_argc + 1, sizeof(char *));
if (!rec_argv)
return -1;
@@ -159,6 +162,11 @@ static int __cmd_record(int argc, const char **argv, struct perf_mem *mem)
if (all_kernel)
rec_argv[i++] = "--all-kernel";
+ if (mem->cpu_list) {
+ rec_argv[i++] = "-C";
+ rec_argv[i++] = mem->cpu_list;
+ }
+
for (j = 0; j < argc; j++, i++)
rec_argv[i] = argv[j];
--
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