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Message-ID: <20200327140610.GA19927@kernel.org>
Date: Fri, 27 Mar 2020 11:06:10 -0300
From: Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To: Namhyung Kim <namhyung@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Ingo Molnar <mingo@...nel.org>,
LKML <linux-kernel@...r.kernel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Adrian Hunter <adrian.hunter@...el.com>,
kernel test robot <rong.a.chen@...el.com>
Subject: Re: [PATCH 3/9] perf tools: Basic support for CGROUP event
Em Wed, Mar 25, 2020 at 09:45:30PM +0900, Namhyung Kim escreveu:
> Implement basic functionality to support cgroup tracking. Each cgroup
> can be identified by inode number which can be read from userspace
> too. The actual cgroup processing will come in the later patch.
>
> Cc: Adrian Hunter <adrian.hunter@...el.com>
> [fix perf test failure on sampling parsing]
> Reported-by: kernel test robot <rong.a.chen@...el.com>
> Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> ---
I'm just separating the UAPI header from the rest of this patch, as has
been usual,
- Arnaldo
> tools/include/uapi/linux/perf_event.h | 16 ++++++++++++++--
> tools/lib/perf/include/perf/event.h | 7 +++++++
> tools/perf/builtin-diff.c | 1 +
> tools/perf/builtin-report.c | 1 +
> tools/perf/tests/sample-parsing.c | 6 +++++-
> tools/perf/util/event.c | 18 ++++++++++++++++++
> tools/perf/util/event.h | 6 ++++++
> tools/perf/util/evsel.c | 6 ++++++
> tools/perf/util/machine.c | 12 ++++++++++++
> tools/perf/util/machine.h | 3 +++
> tools/perf/util/perf_event_attr_fprintf.c | 2 ++
> tools/perf/util/session.c | 4 ++++
> tools/perf/util/synthetic-events.c | 8 ++++++++
> tools/perf/util/tool.h | 1 +
> 14 files changed, 88 insertions(+), 3 deletions(-)
>
> diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
> index 397cfd65b3fe..7b2d6fc9e6ed 100644
> --- a/tools/include/uapi/linux/perf_event.h
> +++ b/tools/include/uapi/linux/perf_event.h
> @@ -142,8 +142,9 @@ enum perf_event_sample_format {
> PERF_SAMPLE_REGS_INTR = 1U << 18,
> PERF_SAMPLE_PHYS_ADDR = 1U << 19,
> PERF_SAMPLE_AUX = 1U << 20,
> + PERF_SAMPLE_CGROUP = 1U << 21,
>
> - PERF_SAMPLE_MAX = 1U << 21, /* non-ABI */
> + PERF_SAMPLE_MAX = 1U << 22, /* non-ABI */
>
> __PERF_SAMPLE_CALLCHAIN_EARLY = 1ULL << 63, /* non-ABI; internal use */
> };
> @@ -381,7 +382,8 @@ struct perf_event_attr {
> ksymbol : 1, /* include ksymbol events */
> bpf_event : 1, /* include bpf events */
> aux_output : 1, /* generate AUX records instead of events */
> - __reserved_1 : 32;
> + cgroup : 1, /* include cgroup events */
> + __reserved_1 : 31;
>
> union {
> __u32 wakeup_events; /* wakeup every n events */
> @@ -1012,6 +1014,16 @@ enum perf_event_type {
> */
> PERF_RECORD_BPF_EVENT = 18,
>
> + /*
> + * struct {
> + * struct perf_event_header header;
> + * u64 id;
> + * char path[];
> + * struct sample_id sample_id;
> + * };
> + */
> + PERF_RECORD_CGROUP = 19,
> +
> PERF_RECORD_MAX, /* non-ABI */
> };
>
> diff --git a/tools/lib/perf/include/perf/event.h b/tools/lib/perf/include/perf/event.h
> index 18106899cb4e..69b44d2cc0f5 100644
> --- a/tools/lib/perf/include/perf/event.h
> +++ b/tools/lib/perf/include/perf/event.h
> @@ -105,6 +105,12 @@ struct perf_record_bpf_event {
> __u8 tag[BPF_TAG_SIZE]; // prog tag
> };
>
> +struct perf_record_cgroup {
> + struct perf_event_header header;
> + __u64 id;
> + char path[PATH_MAX];
> +};
> +
> struct perf_record_sample {
> struct perf_event_header header;
> __u64 array[];
> @@ -352,6 +358,7 @@ union perf_event {
> struct perf_record_mmap2 mmap2;
> struct perf_record_comm comm;
> struct perf_record_namespaces namespaces;
> + struct perf_record_cgroup cgroup;
> struct perf_record_fork fork;
> struct perf_record_lost lost;
> struct perf_record_lost_samples lost_samples;
> diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
> index 5e697cd2224a..c94a002f295e 100644
> --- a/tools/perf/builtin-diff.c
> +++ b/tools/perf/builtin-diff.c
> @@ -455,6 +455,7 @@ static struct perf_diff pdiff = {
> .fork = perf_event__process_fork,
> .lost = perf_event__process_lost,
> .namespaces = perf_event__process_namespaces,
> + .cgroup = perf_event__process_cgroup,
> .ordered_events = true,
> .ordering_requires_timestamps = true,
> },
> diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> index ea673b7eb3f4..26d8fc27e427 100644
> --- a/tools/perf/builtin-report.c
> +++ b/tools/perf/builtin-report.c
> @@ -1105,6 +1105,7 @@ int cmd_report(int argc, const char **argv)
> .mmap2 = perf_event__process_mmap2,
> .comm = perf_event__process_comm,
> .namespaces = perf_event__process_namespaces,
> + .cgroup = perf_event__process_cgroup,
> .exit = perf_event__process_exit,
> .fork = perf_event__process_fork,
> .lost = perf_event__process_lost,
> diff --git a/tools/perf/tests/sample-parsing.c b/tools/perf/tests/sample-parsing.c
> index 14239e472187..61865699c3f4 100644
> --- a/tools/perf/tests/sample-parsing.c
> +++ b/tools/perf/tests/sample-parsing.c
> @@ -151,6 +151,9 @@ static bool samples_same(const struct perf_sample *s1,
> if (type & PERF_SAMPLE_PHYS_ADDR)
> COMP(phys_addr);
>
> + if (type & PERF_SAMPLE_CGROUP)
> + COMP(cgroup);
> +
> if (type & PERF_SAMPLE_AUX) {
> COMP(aux_sample.size);
> if (memcmp(s1->aux_sample.data, s2->aux_sample.data,
> @@ -230,6 +233,7 @@ static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
> .regs = regs,
> },
> .phys_addr = 113,
> + .cgroup = 114,
> .aux_sample = {
> .size = sizeof(aux_data),
> .data = (void *)aux_data,
> @@ -336,7 +340,7 @@ int test__sample_parsing(struct test *test __maybe_unused, int subtest __maybe_u
> * were added. Please actually update the test rather than just change
> * the condition below.
> */
> - if (PERF_SAMPLE_MAX > PERF_SAMPLE_AUX << 1) {
> + if (PERF_SAMPLE_MAX > PERF_SAMPLE_CGROUP << 1) {
> pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
> return -1;
> }
> diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
> index c5447ff516a2..824c038e5c33 100644
> --- a/tools/perf/util/event.c
> +++ b/tools/perf/util/event.c
> @@ -54,6 +54,7 @@ static const char *perf_event__names[] = {
> [PERF_RECORD_NAMESPACES] = "NAMESPACES",
> [PERF_RECORD_KSYMBOL] = "KSYMBOL",
> [PERF_RECORD_BPF_EVENT] = "BPF_EVENT",
> + [PERF_RECORD_CGROUP] = "CGROUP",
> [PERF_RECORD_HEADER_ATTR] = "ATTR",
> [PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
> [PERF_RECORD_HEADER_TRACING_DATA] = "TRACING_DATA",
> @@ -180,6 +181,12 @@ size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
> return ret;
> }
>
> +size_t perf_event__fprintf_cgroup(union perf_event *event, FILE *fp)
> +{
> + return fprintf(fp, " cgroup: %" PRI_lu64 " %s\n",
> + event->cgroup.id, event->cgroup.path);
> +}
> +
> int perf_event__process_comm(struct perf_tool *tool __maybe_unused,
> union perf_event *event,
> struct perf_sample *sample,
> @@ -196,6 +203,14 @@ int perf_event__process_namespaces(struct perf_tool *tool __maybe_unused,
> return machine__process_namespaces_event(machine, event, sample);
> }
>
> +int perf_event__process_cgroup(struct perf_tool *tool __maybe_unused,
> + union perf_event *event,
> + struct perf_sample *sample,
> + struct machine *machine)
> +{
> + return machine__process_cgroup_event(machine, event, sample);
> +}
> +
> int perf_event__process_lost(struct perf_tool *tool __maybe_unused,
> union perf_event *event,
> struct perf_sample *sample,
> @@ -417,6 +432,9 @@ size_t perf_event__fprintf(union perf_event *event, FILE *fp)
> case PERF_RECORD_NAMESPACES:
> ret += perf_event__fprintf_namespaces(event, fp);
> break;
> + case PERF_RECORD_CGROUP:
> + ret += perf_event__fprintf_cgroup(event, fp);
> + break;
> case PERF_RECORD_MMAP2:
> ret += perf_event__fprintf_mmap2(event, fp);
> break;
> diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
> index 3cda40a2fafc..b8289f160f07 100644
> --- a/tools/perf/util/event.h
> +++ b/tools/perf/util/event.h
> @@ -135,6 +135,7 @@ struct perf_sample {
> u32 raw_size;
> u64 data_src;
> u64 phys_addr;
> + u64 cgroup;
> u32 flags;
> u16 insn_len;
> u8 cpumode;
> @@ -322,6 +323,10 @@ int perf_event__process_namespaces(struct perf_tool *tool,
> union perf_event *event,
> struct perf_sample *sample,
> struct machine *machine);
> +int perf_event__process_cgroup(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,
> @@ -377,6 +382,7 @@ size_t perf_event__fprintf_switch(union perf_event *event, FILE *fp);
> size_t perf_event__fprintf_thread_map(union perf_event *event, FILE *fp);
> size_t perf_event__fprintf_cpu_map(union perf_event *event, FILE *fp);
> size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp);
> +size_t perf_event__fprintf_cgroup(union perf_event *event, FILE *fp);
> size_t perf_event__fprintf_ksymbol(union perf_event *event, FILE *fp);
> size_t perf_event__fprintf_bpf(union perf_event *event, FILE *fp);
> size_t perf_event__fprintf(union perf_event *event, FILE *fp);
> diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
> index 15ccd193483f..b766eb608b97 100644
> --- a/tools/perf/util/evsel.c
> +++ b/tools/perf/util/evsel.c
> @@ -2267,6 +2267,12 @@ int perf_evsel__parse_sample(struct evsel *evsel, union perf_event *event,
> array++;
> }
>
> + data->cgroup = 0;
> + if (type & PERF_SAMPLE_CGROUP) {
> + data->cgroup = *array;
> + array++;
> + }
> +
> if (type & PERF_SAMPLE_AUX) {
> OVERFLOW_CHECK_u64(array);
> sz = *array++;
> diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
> index fd14f1489802..399b4731b246 100644
> --- a/tools/perf/util/machine.c
> +++ b/tools/perf/util/machine.c
> @@ -654,6 +654,16 @@ int machine__process_namespaces_event(struct machine *machine __maybe_unused,
> return err;
> }
>
> +int machine__process_cgroup_event(struct machine *machine __maybe_unused,
> + union perf_event *event,
> + struct perf_sample *sample __maybe_unused)
> +{
> + if (dump_trace)
> + perf_event__fprintf_cgroup(event, stdout);
> +
> + return 0;
> +}
> +
> int machine__process_lost_event(struct machine *machine __maybe_unused,
> union perf_event *event, struct perf_sample *sample __maybe_unused)
> {
> @@ -1878,6 +1888,8 @@ int machine__process_event(struct machine *machine, union perf_event *event,
> ret = machine__process_mmap_event(machine, event, sample); break;
> case PERF_RECORD_NAMESPACES:
> ret = machine__process_namespaces_event(machine, event, sample); break;
> + case PERF_RECORD_CGROUP:
> + ret = machine__process_cgroup_event(machine, event, sample); break;
> case PERF_RECORD_MMAP2:
> ret = machine__process_mmap2_event(machine, event, sample); break;
> case PERF_RECORD_FORK:
> diff --git a/tools/perf/util/machine.h b/tools/perf/util/machine.h
> index be0a930eca89..fa1be9ea00fa 100644
> --- a/tools/perf/util/machine.h
> +++ b/tools/perf/util/machine.h
> @@ -128,6 +128,9 @@ int machine__process_switch_event(struct machine *machine,
> int machine__process_namespaces_event(struct machine *machine,
> union perf_event *event,
> struct perf_sample *sample);
> +int machine__process_cgroup_event(struct machine *machine,
> + union perf_event *event,
> + struct perf_sample *sample);
> 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/perf_event_attr_fprintf.c b/tools/perf/util/perf_event_attr_fprintf.c
> index 355d3458d4e6..b94fa07f5d32 100644
> --- a/tools/perf/util/perf_event_attr_fprintf.c
> +++ b/tools/perf/util/perf_event_attr_fprintf.c
> @@ -35,6 +35,7 @@ static void __p_sample_type(char *buf, size_t size, u64 value)
> bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
> bit_name(IDENTIFIER), bit_name(REGS_INTR), bit_name(DATA_SRC),
> bit_name(WEIGHT), bit_name(PHYS_ADDR), bit_name(AUX),
> + bit_name(CGROUP),
> { .name = NULL, }
> };
> #undef bit_name
> @@ -132,6 +133,7 @@ int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
> PRINT_ATTRf(ksymbol, p_unsigned);
> PRINT_ATTRf(bpf_event, p_unsigned);
> PRINT_ATTRf(aux_output, p_unsigned);
> + PRINT_ATTRf(cgroup, p_unsigned);
>
> PRINT_ATTRn("{ wakeup_events, wakeup_watermark }", wakeup_events, p_unsigned);
> PRINT_ATTRf(bp_type, p_unsigned);
> diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
> index 055b00abd56d..0b0bfe5bef17 100644
> --- a/tools/perf/util/session.c
> +++ b/tools/perf/util/session.c
> @@ -471,6 +471,8 @@ void perf_tool__fill_defaults(struct perf_tool *tool)
> tool->comm = process_event_stub;
> if (tool->namespaces == NULL)
> tool->namespaces = process_event_stub;
> + if (tool->cgroup == NULL)
> + tool->cgroup = process_event_stub;
> if (tool->fork == NULL)
> tool->fork = process_event_stub;
> if (tool->exit == NULL)
> @@ -1436,6 +1438,8 @@ static int machines__deliver_event(struct machines *machines,
> return tool->comm(tool, event, sample, machine);
> case PERF_RECORD_NAMESPACES:
> return tool->namespaces(tool, event, sample, machine);
> + case PERF_RECORD_CGROUP:
> + return tool->cgroup(tool, event, sample, machine);
> case PERF_RECORD_FORK:
> return tool->fork(tool, event, sample, machine);
> case PERF_RECORD_EXIT:
> diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c
> index 3f28af39f9c6..f72d80999506 100644
> --- a/tools/perf/util/synthetic-events.c
> +++ b/tools/perf/util/synthetic-events.c
> @@ -1230,6 +1230,9 @@ size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
> if (type & PERF_SAMPLE_PHYS_ADDR)
> result += sizeof(u64);
>
> + if (type & PERF_SAMPLE_CGROUP)
> + result += sizeof(u64);
> +
> if (type & PERF_SAMPLE_AUX) {
> result += sizeof(u64);
> result += sample->aux_sample.size;
> @@ -1404,6 +1407,11 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_fo
> array++;
> }
>
> + if (type & PERF_SAMPLE_CGROUP) {
> + *array = sample->cgroup;
> + array++;
> + }
> +
> if (type & PERF_SAMPLE_AUX) {
> sz = sample->aux_sample.size;
> *array++ = sz;
> diff --git a/tools/perf/util/tool.h b/tools/perf/util/tool.h
> index 2abbf668b8de..472ef5eb4068 100644
> --- a/tools/perf/util/tool.h
> +++ b/tools/perf/util/tool.h
> @@ -46,6 +46,7 @@ struct perf_tool {
> mmap2,
> comm,
> namespaces,
> + cgroup,
> fork,
> exit,
> lost,
> --
> 2.25.1.696.g5e7596f4ac-goog
>
--
- Arnaldo
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