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perf tools: Add core support for sampling intr machine state regs

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Add the infrastructure to setup, collect and report the interrupt
machine state regs which can be captured by the kernel.

Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: cebbert.lkml@gmail.com
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Jean Pihet <jean.pihet@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Waiman Long <Waiman.Long@hp.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1411559322-16548-4-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Stephane Eranian
2014-09-24 13:48:39 +02:00
committed by Ingo Molnar
parent aea48559ac
commit 6a21c0b5c2
5 changed files with 87 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
tools/perf/util/evsel.c
View File

@@ -661,6 +661,11 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
if (callchain_param.enabled && !evsel->no_aux_samples)
perf_evsel__config_callgraph(evsel);
if (opts->sample_intr_regs) {
attr->sample_regs_intr = PERF_REGS_MASK;
perf_evsel__set_sample_bit(evsel, REGS_INTR);
}
if (target__has_cpu(&opts->target))
perf_evsel__set_sample_bit(evsel, CPU);
@@ -1037,6 +1042,7 @@ static size_t perf_event_attr__fprintf(struct perf_event_attr *attr, FILE *fp)
ret += PRINT_ATTR_X64(branch_sample_type);
ret += PRINT_ATTR_X64(sample_regs_user);
ret += PRINT_ATTR_U32(sample_stack_user);
ret += PRINT_ATTR_X64(sample_regs_intr);
ret += fprintf(fp, "%.60s\n", graph_dotted_line);
@@ -1536,6 +1542,23 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event,
array++;
}
data->intr_regs.abi = PERF_SAMPLE_REGS_ABI_NONE;
if (type & PERF_SAMPLE_REGS_INTR) {
OVERFLOW_CHECK_u64(array);
data->intr_regs.abi = *array;
array++;
if (data->intr_regs.abi != PERF_SAMPLE_REGS_ABI_NONE) {
u64 mask = evsel->attr.sample_regs_intr;
sz = hweight_long(mask) * sizeof(u64);
OVERFLOW_CHECK(array, sz, max_size);
data->intr_regs.mask = mask;
data->intr_regs.regs = (u64 *)array;
array = (void *)array + sz;
}
}
return 0;
}
@@ -1631,6 +1654,16 @@ size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
if (type & PERF_SAMPLE_TRANSACTION)
result += sizeof(u64);
if (type & PERF_SAMPLE_REGS_INTR) {
if (sample->intr_regs.abi) {
result += sizeof(u64);
sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
result += sz;
} else {
result += sizeof(u64);
}
}
return result;
}
@@ -1809,6 +1842,17 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type,
array++;
}
if (type & PERF_SAMPLE_REGS_INTR) {
if (sample->intr_regs.abi) {
*array++ = sample->intr_regs.abi;
sz = hweight_long(sample->intr_regs.mask) * sizeof(u64);
memcpy(array, sample->intr_regs.regs, sz);
array = (void *)array + sz;
} else {
*array++ = 0;
}
}
return 0;
}
@@ -1938,7 +1982,7 @@ static int sample_type__fprintf(FILE *fp, bool *first, u64 value)
bit_name(READ), bit_name(CALLCHAIN), bit_name(ID), bit_name(CPU),
bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
bit_name(IDENTIFIER),
bit_name(IDENTIFIER), bit_name(REGS_INTR),
{ .name = NULL, }
};
#undef bit_name