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 <[email protected]> --- tools/perf/perf.h | 1 + tools/perf/util/event.h | 1 + tools/perf/util/evsel.c | 46 ++++++++++++++++++++++++++++++++++++++++++++- tools/perf/util/session.c | 44 ++++++++++++++++++++++++++++++++++++++----- 4 files changed, 86 insertions(+), 6 deletions(-) diff --git a/tools/perf/perf.h b/tools/perf/perf.h index 510c65f..309d956 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -54,6 +54,7 @@ struct record_opts { bool sample_weight; bool sample_time; bool period; + bool sample_intr_regs; unsigned int freq; unsigned int mmap_pages; unsigned int user_freq; diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h index e5dd40a..4e36967 100644 --- a/tools/perf/util/event.h +++ b/tools/perf/util/event.h @@ -160,6 +160,7 @@ struct perf_sample { struct ip_callchain *callchain; struct branch_stack *branch_stack; struct regs_dump user_regs; + struct regs_dump intr_regs; struct stack_dump user_stack; struct sample_read read; }; diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 8606175..2ba3403 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -626,6 +626,11 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts) if (opts->call_graph_enabled) perf_evsel__config_callgraph(evsel, opts); + 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); @@ -979,6 +984,7 @@ 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); @@ -1468,6 +1474,23 @@ 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; } @@ -1563,6 +1586,16 @@ 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; } @@ -1741,6 +1774,17 @@ 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; } @@ -1870,7 +1914,7 @@ 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 diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 64a186e..9da3eda 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -702,15 +702,46 @@ static void regs_dump__printf(u64 mask, u64 *regs) } } +static const char *regs_abi[]= { + [PERF_SAMPLE_REGS_ABI_NONE] = "none", + [PERF_SAMPLE_REGS_ABI_32] = "32-bit", + [PERF_SAMPLE_REGS_ABI_64] = "64-bit", +}; + +static inline const char *regs_dump_abi(struct regs_dump *d) +{ + if (d->abi > PERF_SAMPLE_REGS_ABI_64) + return "unknown"; + + return regs_abi[d->abi]; +} + +static void regs__printf(const char *type, struct regs_dump *regs) +{ + u64 mask = regs->mask; + + printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", + type, + mask, + regs_dump_abi(regs)); + + regs_dump__printf(mask, regs->regs); +} + static void regs_user__printf(struct perf_sample *sample) { struct regs_dump *user_regs = &sample->user_regs; - if (user_regs->regs) { - u64 mask = user_regs->mask; - printf("... user regs: mask 0x%" PRIx64 "\n", mask); - regs_dump__printf(mask, user_regs->regs); - } + if (user_regs->regs) + regs__printf("user", user_regs); +} + +static void regs_intr__printf(struct perf_sample *sample) +{ + struct regs_dump *intr_regs = &sample->intr_regs; + + if (intr_regs->regs) + regs__printf("intr", intr_regs); } static void stack_user__printf(struct stack_dump *dump) @@ -809,6 +840,9 @@ static void dump_sample(struct perf_evsel *evsel, union perf_event *event, if (sample_type & PERF_SAMPLE_REGS_USER) regs_user__printf(sample); + if (sample_type & PERF_SAMPLE_REGS_INTR) + regs_intr__printf(sample); + if (sample_type & PERF_SAMPLE_STACK_USER) stack_user__printf(&sample->user_stack); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
