diff options
| -rw-r--r-- | tools/perf/Documentation/perf-config.txt | 4 | ||||
| -rw-r--r-- | tools/perf/arch/x86/util/intel-pt.c | 16 |
2 files changed, 19 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-config.txt b/tools/perf/Documentation/perf-config.txt index 36ebebc875ea..c6f335659667 100644 --- a/tools/perf/Documentation/perf-config.txt +++ b/tools/perf/Documentation/perf-config.txt @@ -708,6 +708,10 @@ intel-pt.*:: the maximum is exceeded there will be a "Never-ending loop" error. The default is 100000. + intel-pt.all-switch-events:: + If the user has permission to do so, always record all context + switch events on all CPUs. + auxtrace.*:: auxtrace.dumpdir:: diff --git a/tools/perf/arch/x86/util/intel-pt.c b/tools/perf/arch/x86/util/intel-pt.c index 8f235d8b67b6..add33cb5d1da 100644 --- a/tools/perf/arch/x86/util/intel-pt.c +++ b/tools/perf/arch/x86/util/intel-pt.c @@ -19,6 +19,7 @@ #include "../../../util/evlist.h" #include "../../../util/evsel.h" #include "../../../util/evsel_config.h" +#include "../../../util/config.h" #include "../../../util/cpumap.h" #include "../../../util/mmap.h" #include <subcmd/parse-options.h> @@ -52,6 +53,7 @@ struct intel_pt_recording { struct perf_pmu *intel_pt_pmu; int have_sched_switch; struct evlist *evlist; + bool all_switch_events; bool snapshot_mode; bool snapshot_init_done; size_t snapshot_size; @@ -794,7 +796,7 @@ static int intel_pt_recording_options(struct auxtrace_record *itr, bool cpu_wide = !target__none(&opts->target) && !target__has_task(&opts->target); - if (!cpu_wide && perf_can_record_cpu_wide()) { + if (ptr->all_switch_events && !cpu_wide && perf_can_record_cpu_wide()) { struct evsel *switch_evsel; switch_evsel = evlist__add_dummy_on_all_cpus(evlist); @@ -1178,6 +1180,16 @@ static u64 intel_pt_reference(struct auxtrace_record *itr __maybe_unused) return rdtsc(); } +static int intel_pt_perf_config(const char *var, const char *value, void *data) +{ + struct intel_pt_recording *ptr = data; + + if (!strcmp(var, "intel-pt.all-switch-events")) + ptr->all_switch_events = perf_config_bool(var, value); + + return 0; +} + struct auxtrace_record *intel_pt_recording_init(int *err) { struct perf_pmu *intel_pt_pmu = perf_pmus__find(INTEL_PT_PMU_NAME); @@ -1197,6 +1209,8 @@ struct auxtrace_record *intel_pt_recording_init(int *err) return NULL; } + perf_config(intel_pt_perf_config, ptr); + ptr->intel_pt_pmu = intel_pt_pmu; ptr->itr.recording_options = intel_pt_recording_options; ptr->itr.info_priv_size = intel_pt_info_priv_size; |