perf kwork: Add softirq report support
Implements softirq kwork report function.
Test cases:
# perf kwork -k softirq rep
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
(s)TIMER:1 | 0003 | 181.387 ms | 2476 | 1.240 ms | 44004.787960 s | 44004.789201 s |
(s)RCU:9 | 0003 | 91.573 ms | 2193 | 0.650 ms | 44004.790258 s | 44004.790908 s |
(s)RCU:9 | 0001 | 78.960 ms | 1619 | 1.195 ms | 44001.496553 s | 44001.497749 s |
(s)SCHED:7 | 0003 | 55.962 ms | 1255 | 0.954 ms | 44004.812008 s | 44004.812962 s |
... <SNIP> ...
(s)RCU:9 | 0004 | 0.830 ms | 26 | 0.058 ms | 43997.666418 s | 43997.666476 s |
(s)TIMER:1 | 0001 | 0.471 ms | 4 | 0.158 ms | 44007.834694 s | 44007.834852 s |
(s)RCU:9 | 0006 | 0.220 ms | 7 | 0.048 ms | 44004.833764 s | 44004.833812 s |
(s)NET_RX:3 | 0002 | 0.164 ms | 5 | 0.049 ms | 44005.012418 s | 44005.012466 s |
(s)TIMER:1 | 0005 | 0.164 ms | 1 | 0.164 ms | 44007.820474 s | 44007.820638 s |
(s)TIMER:1 | 0006 | 0.087 ms | 1 | 0.087 ms | 44000.830807 s | 44000.830894 s |
(s)SCHED:7 | 0006 | 0.080 ms | 2 | 0.044 ms | 43997.826145 s | 43997.826189 s |
--------------------------------------------------------------------------------------------------------------------------------
#
# perf kwork -k softirq rep -S
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
(s)TIMER:1 | 0003 | 181.387 ms | 2476 | 1.240 ms | 44004.787960 s | 44004.789201 s |
(s)RCU:9 | 0003 | 91.573 ms | 2193 | 0.650 ms | 44004.790258 s | 44004.790908 s |
(s)RCU:9 | 0001 | 78.960 ms | 1619 | 1.195 ms | 44001.496553 s | 44001.497749 s |
(s)SCHED:7 | 0000 | 63.631 ms | 680 | 2.690 ms | 44006.721976 s | 44006.724666 s |
... <SNIP> ...
(s)SCHED:7 | 0003 | 55.962 ms | 1255 | 0.954 ms | 44004.812008 s | 44004.812962 s |
(s)RCU:9 | 0006 | 0.220 ms | 7 | 0.048 ms | 44004.833764 s | 44004.833812 s |
(s)NET_RX:3 | 0002 | 0.164 ms | 5 | 0.049 ms | 44005.012418 s | 44005.012466 s |
(s)TIMER:1 | 0005 | 0.164 ms | 1 | 0.164 ms | 44007.820474 s | 44007.820638 s |
(s)TIMER:1 | 0006 | 0.087 ms | 1 | 0.087 ms | 44000.830807 s | 44000.830894 s |
(s)SCHED:7 | 0006 | 0.080 ms | 2 | 0.044 ms | 43997.826145 s | 43997.826189 s |
--------------------------------------------------------------------------------------------------------------------------------
Total count : 12748
Total runtime (msec) : 661.433 (0.065% load average)
Total time span (msec) : 10176.441
--------------------------------------------------------------------------------------------------------------------------------
#
# perf kwork -k softirq rep -s count,max
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
(s)TIMER:1 | 0003 | 181.387 ms | 2476 | 1.240 ms | 44004.787960 s | 44004.789201 s |
(s)RCU:9 | 0003 | 91.573 ms | 2193 | 0.650 ms | 44004.790258 s | 44004.790908 s |
(s)SCHED:7 | 0002 | 50.039 ms | 1731 | 0.074 ms | 44005.009447 s | 44005.009521 s |
(s)RCU:9 | 0001 | 78.960 ms | 1619 | 1.195 ms | 44001.496553 s | 44001.497749 s |
(s)SCHED:7 | 0003 | 55.962 ms | 1255 | 0.954 ms | 44004.812008 s | 44004.812962 s |
... <SNIP> ...
(s)RCU:9 | 0002 | 35.241 ms | 932 | 0.407 ms | 44005.009541 s | 44005.009949 s |
(s)RCU:9 | 0000 | 45.710 ms | 702 | 1.144 ms | 44004.787023 s | 44004.788167 s |
(s)SCHED:7 | 0006 | 0.080 ms | 2 | 0.044 ms | 43997.826145 s | 43997.826189 s |
(s)TIMER:1 | 0005 | 0.164 ms | 1 | 0.164 ms | 44007.820474 s | 44007.820638 s |
(s)TIMER:1 | 0006 | 0.087 ms | 1 | 0.087 ms | 44000.830807 s | 44000.830894 s |
--------------------------------------------------------------------------------------------------------------------------------
Committer testing:
# perf kwork -k softirq report -C 2 -s count,max
Kwork Name | Cpu | Total Runtime | Count | Max runtime | Max runtime start | Max runtime end |
--------------------------------------------------------------------------------------------------------------------------------
(s)SCHED:7 | 0002 | 0.980 ms | 159 | 0.024 ms | 26035.571037 s | 26035.571061 s |
(s)RCU:9 | 0002 | 0.124 ms | 88 | 0.021 ms | 26035.177050 s | 26035.177071 s |
(s)TIMER:1 | 0002 | 0.122 ms | 56 | 0.007 ms | 26035.468045 s | 26035.468052 s |
--------------------------------------------------------------------------------------------------------------------------------
#
Signed-off-by: Yang Jihong <yangjihong1@huawei.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220709015033.38326-9-yangjihong1@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Yang Jihong
Arnaldo Carvalho de Melo
Родитель
94348520c6
Коммит
4c14819169
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@ -550,17 +550,111 @@ static struct kwork_class kwork_irq = {
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.work_name = irq_work_name,
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};
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static struct kwork_class kwork_softirq;
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static int process_softirq_entry_event(struct perf_tool *tool,
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struct evsel *evsel,
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struct perf_sample *sample,
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struct machine *machine)
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{
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struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
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if (kwork->tp_handler->entry_event)
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return kwork->tp_handler->entry_event(kwork, &kwork_softirq,
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evsel, sample, machine);
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return 0;
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}
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static int process_softirq_exit_event(struct perf_tool *tool,
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struct evsel *evsel,
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struct perf_sample *sample,
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struct machine *machine)
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{
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struct perf_kwork *kwork = container_of(tool, struct perf_kwork, tool);
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if (kwork->tp_handler->exit_event)
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return kwork->tp_handler->exit_event(kwork, &kwork_softirq,
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evsel, sample, machine);
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return 0;
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}
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const struct evsel_str_handler softirq_tp_handlers[] = {
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{ "irq:softirq_raise", NULL, },
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{ "irq:softirq_entry", NULL, },
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{ "irq:softirq_exit", NULL, },
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{ "irq:softirq_entry", process_softirq_entry_event, },
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{ "irq:softirq_exit", process_softirq_exit_event, },
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};
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static int softirq_class_init(struct kwork_class *class,
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struct perf_session *session)
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{
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if (perf_session__set_tracepoints_handlers(session,
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softirq_tp_handlers)) {
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pr_err("Failed to set softirq tracepoints handlers\n");
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return -1;
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}
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class->work_root = RB_ROOT_CACHED;
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return 0;
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}
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static char *evsel__softirq_name(struct evsel *evsel, u64 num)
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{
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char *name = NULL;
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bool found = false;
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struct tep_print_flag_sym *sym = NULL;
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struct tep_print_arg *args = evsel->tp_format->print_fmt.args;
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if ((args == NULL) || (args->next == NULL))
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return NULL;
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/* skip softirq field: "REC->vec" */
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for (sym = args->next->symbol.symbols; sym != NULL; sym = sym->next) {
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if ((eval_flag(sym->value) == (unsigned long long)num) &&
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(strlen(sym->str) != 0)) {
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found = true;
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break;
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}
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}
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if (!found)
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return NULL;
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name = strdup(sym->str);
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if (name == NULL) {
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pr_err("Failed to copy symbol name\n");
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return NULL;
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}
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return name;
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}
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static void softirq_work_init(struct kwork_class *class,
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struct kwork_work *work,
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struct evsel *evsel,
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struct perf_sample *sample,
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struct machine *machine __maybe_unused)
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{
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u64 num = evsel__intval(evsel, sample, "vec");
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work->id = num;
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work->class = class;
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work->cpu = sample->cpu;
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work->name = evsel__softirq_name(evsel, num);
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}
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static void softirq_work_name(struct kwork_work *work, char *buf, int len)
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{
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snprintf(buf, len, "(s)%s:%" PRIu64 "", work->name, work->id);
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}
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static struct kwork_class kwork_softirq = {
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.name = "softirq",
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.type = KWORK_CLASS_SOFTIRQ,
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.nr_tracepoints = 3,
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.tp_handlers = softirq_tp_handlers,
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.class_init = softirq_class_init,
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.work_init = softirq_work_init,
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.work_name = softirq_work_name,
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};
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const struct evsel_str_handler workqueue_tp_handlers[] = {
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