From: Arnaldo Carvalho de Melo acme@redhat.com
[ Upstream commit 7fbfe22cf4cfe01a88704dd76ca65d108039d297 ]
When doing a system wide 'perf trace record' we need, just like in 'perf trace' live mode, to filter out perf trace's own pid, so set up a tracepoint filter for the raw_syscalls tracepoints right after adding them to the argv array that is set up to then call cmd_record().
Reported-by: Andi Kleen ak@linux.intel.com Cc: Adrian Hunter adrian.hunter@intel.com Cc: David Ahern dsahern@gmail.com Cc: Jiri Olsa jolsa@kernel.org Cc: Luis Cláudio Gonçalves lclaudio@redhat.com Cc: Namhyung Kim namhyung@kernel.org Link: https://lkml.kernel.org/n/tip-uysx5w8f2y5ndoln5cq370tv@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- tools/perf/builtin-trace.c | 24 ++++++++++++++++-------- 1 file changed, 16 insertions(+), 8 deletions(-)
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index b224bf3f2b994..63a35036321bb 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -2055,21 +2055,23 @@ static int trace__record(struct trace *trace, int argc, const char **argv) "-m", "1024", "-c", "1", }; - + pid_t pid = getpid(); + char *filter = asprintf__tp_filter_pids(1, &pid); const char * const sc_args[] = { "-e", }; unsigned int sc_args_nr = ARRAY_SIZE(sc_args); const char * const majpf_args[] = { "-e", "major-faults" }; unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); const char * const minpf_args[] = { "-e", "minor-faults" }; unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); + int err = -1;
- /* +1 is for the event string below */ - rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 + + /* +3 is for the event string below and the pid filter */ + rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 + majpf_args_nr + minpf_args_nr + argc; rec_argv = calloc(rec_argc + 1, sizeof(char *));
- if (rec_argv == NULL) - return -ENOMEM; + if (rec_argv == NULL || filter == NULL) + goto out_free;
j = 0; for (i = 0; i < ARRAY_SIZE(record_args); i++) @@ -2086,11 +2088,13 @@ static int trace__record(struct trace *trace, int argc, const char **argv) rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; else { pr_err("Neither raw_syscalls nor syscalls events exist.\n"); - free(rec_argv); - return -1; + goto out_free; } }
+ rec_argv[j++] = "--filter"; + rec_argv[j++] = filter; + if (trace->trace_pgfaults & TRACE_PFMAJ) for (i = 0; i < majpf_args_nr; i++) rec_argv[j++] = majpf_args[i]; @@ -2102,7 +2106,11 @@ static int trace__record(struct trace *trace, int argc, const char **argv) for (i = 0; i < (unsigned int)argc; i++) rec_argv[j++] = argv[i];
- return cmd_record(j, rec_argv); + err = cmd_record(j, rec_argv); +out_free: + free(filter); + free(rec_argv); + return err; }
static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp);