perf tools: Basic support for CGROUP event

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.

Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
[ fix perf test failure on sampling parsing ]
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200325124536.2800725-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/lib/perf/include/perf/event.h b/tools/lib/perf/include/perf/event.h
index 1810689..69b44d2 100644 (file)
--- 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 5e697cd..c94a002 100644 (file)
--- 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 ea673b7..26d8fc2 100644 (file)
--- 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 14239e4..6186569 100644 (file)
--- 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 c5447ff..824c038 100644 (file)
--- 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 3cda40a..b8289f1 100644 (file)
--- 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 15ccd19..b766eb6 100644 (file)
--- 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 fd14f14..399b473 100644 (file)
--- 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 be0a930..fa1be9e 100644 (file)
--- 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 355d345..b94fa07 100644 (file)
--- 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 055b00a..0b0bfe5 100644 (file)
--- 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 3f28af3..f72d809 100644 (file)
--- 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 2abbf66..472ef5e 100644 (file)
--- 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,