[RFC V2 PATCH 2/4] perf tools: Add new PERF_RECORD_SWITCH event
From: Adrian Hunter
Date: Fri Jul 03 2015 - 08:55:45 EST
Support processing of PERF_RECORD_SWITCH events.
There is still no way to select them, though.
That is added in a subsequest patch.
Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
---
tools/perf/builtin-inject.c | 1 +
tools/perf/util/event.c | 26 ++++++++++++++++++++++++++
tools/perf/util/event.h | 12 ++++++++++++
tools/perf/util/evsel.c | 1 +
tools/perf/util/machine.c | 10 ++++++++++
tools/perf/util/machine.h | 2 ++
tools/perf/util/session.c | 16 ++++++++++++++++
tools/perf/util/tool.h | 1 +
8 files changed, 69 insertions(+)
diff --git a/tools/perf/builtin-inject.c b/tools/perf/builtin-inject.c
index 01b06492bd6a..f62c49b35be0 100644
--- a/tools/perf/builtin-inject.c
+++ b/tools/perf/builtin-inject.c
@@ -561,6 +561,7 @@ int cmd_inject(int argc, const char **argv, const char *prefix __maybe_unused)
.lost = perf_event__repipe,
.aux = perf_event__repipe,
.itrace_start = perf_event__repipe,
+ .context_switch = perf_event__repipe,
.read = perf_event__repipe_sample,
.throttle = perf_event__repipe,
.unthrottle = perf_event__repipe,
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 67a977e5d0ab..c61cc02932fa 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -26,6 +26,7 @@ static const char *perf_event__names[] = {
[PERF_RECORD_AUX] = "AUX",
[PERF_RECORD_ITRACE_START] = "ITRACE_START",
[PERF_RECORD_LOST_SAMPLES] = "LOST_SAMPLES",
+ [PERF_RECORD_SWITCH] = "SWITCH",
[PERF_RECORD_HEADER_ATTR] = "ATTR",
[PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
[PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
@@ -749,6 +750,14 @@ int perf_event__process_lost_samples(struct perf_tool *tool __maybe_unused,
return machine__process_lost_samples_event(machine, event, sample);
}
+int perf_event__process_switch(struct perf_tool *tool __maybe_unused,
+ union perf_event *event,
+ struct perf_sample *sample __maybe_unused,
+ struct machine *machine)
+{
+ return machine__process_switch_event(machine, event);
+}
+
size_t perf_event__fprintf_mmap(union perf_event *event, FILE *fp)
{
return fprintf(fp, " %d/%d: [%#" PRIx64 "(%#" PRIx64 ") @ %#" PRIx64 "]: %c %s\n",
@@ -827,6 +836,20 @@ size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp)
event->itrace_start.pid, event->itrace_start.tid);
}
+size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp)
+{
+ bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
+ const char *in_out = out ? "OUT" : "IN ";
+
+ if (event->context_switch.next_prev_pid == (u32)-1)
+ return fprintf(fp, " %s\n", in_out);
+
+ return fprintf(fp, " %s %s pid/tid: %5u/%-5u\n",
+ in_out, out ? "next" : "prev",
+ event->context_switch.next_prev_pid,
+ event->context_switch.next_prev_tid);
+}
+
size_t perf_event__fprintf(union perf_event *event, FILE *fp)
{
size_t ret = fprintf(fp, "PERF_RECORD_%s",
@@ -852,6 +875,9 @@ size_t perf_event__fprintf(union perf_event *event, FILE *fp)
case PERF_RECORD_ITRACE_START:
ret += perf_event__fprintf_itrace_start(event, fp);
break;
+ case PERF_RECORD_SWITCH:
+ ret += perf_event__fprintf_switch(event, fp);
+ break;
default:
ret += fprintf(fp, "\n");
}
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index c53f36384b64..4bb2ae894c78 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -348,6 +348,12 @@ struct itrace_start_event {
u32 pid, tid;
};
+struct context_switch_event {
+ struct perf_event_header header;
+ u32 next_prev_pid;
+ u32 next_prev_tid;
+};
+
union perf_event {
struct perf_event_header header;
struct mmap_event mmap;
@@ -369,6 +375,7 @@ union perf_event {
struct auxtrace_error_event auxtrace_error;
struct aux_event aux;
struct itrace_start_event itrace_start;
+ struct context_switch_event context_switch;
};
void perf_event__print_totals(void);
@@ -418,6 +425,10 @@ int perf_event__process_itrace_start(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct machine *machine);
+int perf_event__process_switch(struct perf_tool *tool,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct machine *machine);
int perf_event__process_mmap(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
@@ -480,6 +491,7 @@ size_t perf_event__fprintf_mmap2(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_task(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_aux(union perf_event *event, FILE *fp);
size_t perf_event__fprintf_itrace_start(union perf_event *event, FILE *fp);
+size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp);
size_t perf_event__fprintf(union perf_event *event, FILE *fp);
u64 kallsyms__get_function_start(const char *kallsyms_filename,
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 2936b3080722..fbb5f70d45a0 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -1095,6 +1095,7 @@ int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
PRINT_ATTRf(mmap2, p_unsigned);
PRINT_ATTRf(comm_exec, p_unsigned);
PRINT_ATTRf(use_clockid, p_unsigned);
+ PRINT_ATTRf(context_switch, p_unsigned);
PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
PRINT_ATTRf(bp_type, p_unsigned);
diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 7ff682770fdb..dfcd80df7cba 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -550,6 +550,14 @@ int machine__process_itrace_start_event(struct machine *machine __maybe_unused,
return 0;
}
+int machine__process_switch_event(struct machine *machine __maybe_unused,
+ union perf_event *event)
+{
+ if (dump_trace)
+ perf_event__fprintf_switch(event, stdout);
+ return 0;
+}
+
struct map *machine__findnew_module_map(struct machine *machine, u64 start,
const char *filename)
{
@@ -1451,6 +1459,8 @@ int machine__process_event(struct machine *machine, union perf_event *event,
ret = machine__process_itrace_start_event(machine, event); break;
case PERF_RECORD_LOST_SAMPLES:
ret = machine__process_lost_samples_event(machine, event, sample); break;
+ case PERF_RECORD_SWITCH:
+ ret = machine__process_switch_event(machine, event); break;
default:
ret = -1;
break;
diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
index 887798e511e9..f890697a4c9c 100644
--- a/tools/perf/util/machine.h
+++ b/tools/perf/util/machine.h
@@ -87,6 +87,8 @@ int machine__process_aux_event(struct machine *machine,
union perf_event *event);
int machine__process_itrace_start_event(struct machine *machine,
union perf_event *event);
+int machine__process_switch_event(struct machine *machine __maybe_unused,
+ union perf_event *event);
int machine__process_mmap_event(struct machine *machine, union perf_event *event,
struct perf_sample *sample);
int machine__process_mmap2_event(struct machine *machine, union perf_event *event,
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index ed9dc2555ec7..be6914a1c29d 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -332,6 +332,8 @@ void perf_tool__fill_defaults(struct perf_tool *tool)
tool->aux = perf_event__process_aux;
if (tool->itrace_start == NULL)
tool->itrace_start = perf_event__process_itrace_start;
+ if (tool->context_switch == NULL)
+ tool->context_switch = perf_event__process_switch;
if (tool->read == NULL)
tool->read = process_event_sample_stub;
if (tool->throttle == NULL)
@@ -470,6 +472,17 @@ static void perf_event__itrace_start_swap(union perf_event *event,
swap_sample_id_all(event, &event->itrace_start + 1);
}
+static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
+{
+ event->context_switch.next_prev_pid =
+ bswap_32(event->context_switch.next_prev_pid);
+ event->context_switch.next_prev_tid =
+ bswap_32(event->context_switch.next_prev_tid);
+
+ if (sample_id_all)
+ swap_sample_id_all(event, &event->context_switch + 1);
+}
+
static void perf_event__throttle_swap(union perf_event *event,
bool sample_id_all)
{
@@ -632,6 +645,7 @@ static perf_event__swap_op perf_event__swap_ops[] = {
[PERF_RECORD_AUX] = perf_event__aux_swap,
[PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
[PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
+ [PERF_RECORD_SWITCH] = perf_event__switch_swap,
[PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
[PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
[PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
@@ -1093,6 +1107,8 @@ static int machines__deliver_event(struct machines *machines,
return tool->aux(tool, event, sample, machine);
case PERF_RECORD_ITRACE_START:
return tool->itrace_start(tool, event, sample, machine);
+ case PERF_RECORD_SWITCH:
+ return tool->context_switch(tool, event, sample, machine);
default:
++evlist->stats.nr_unknown_events;
return -1;
diff --git a/tools/perf/util/tool.h b/tools/perf/util/tool.h
index c307dd438286..cab8cc24831b 100644
--- a/tools/perf/util/tool.h
+++ b/tools/perf/util/tool.h
@@ -46,6 +46,7 @@ struct perf_tool {
lost_samples,
aux,
itrace_start,
+ context_switch,
throttle,
unthrottle;
event_attr_op attr;
--
1.9.1
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