Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757317Ab3H3TBt (ORCPT ); Fri, 30 Aug 2013 15:01:49 -0400 Received: from merlin.infradead.org ([205.233.59.134]:45583 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754751Ab3H3S7O (ORCPT ); Fri, 30 Aug 2013 14:59:14 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Adrian Hunter , David Ahern , Frederic Weisbecker , Jiri Olsa , Mike Galbraith , Namhyung Kim , Paul Mackerras , Peter Zijlstra , Stephane Eranian , Arnaldo Carvalho de Melo Subject: [PATCH 10/15] perf tools: Add a function to calculate sample event size Date: Fri, 30 Aug 2013 15:58:53 -0300 Message-Id: <1377889138-8793-11-git-send-email-acme@infradead.org> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1377889138-8793-1-git-send-email-acme@infradead.org> References: <1377889138-8793-1-git-send-email-acme@infradead.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by merlin.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4268 Lines: 147 From: Adrian Hunter Add perf_event__sample_event_size() which can be used when synthesizing sample events to determine how big the resulting event will be, and therefore how much memory to allocate. Signed-off-by: Adrian Hunter Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/r/1377591794-30553-11-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/event.h | 2 ++ tools/perf/util/evsel.c | 92 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 94 insertions(+) diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h index 1c80e13..93130d8 100644 --- a/tools/perf/util/event.h +++ b/tools/perf/util/event.h @@ -229,6 +229,8 @@ int perf_event__preprocess_sample(const union perf_event *self, const char *perf_event__name(unsigned int id); +size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, + u64 sample_regs_user, u64 read_format); int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 sample_regs_user, u64 read_format, const struct perf_sample *sample, diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 7d62373..e8745fb 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1465,6 +1465,98 @@ int perf_evsel__parse_sample(struct perf_evsel *evsel, union perf_event *event, return 0; } +size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, + u64 sample_regs_user, u64 read_format) +{ + size_t sz, result = sizeof(struct sample_event); + + if (type & PERF_SAMPLE_IDENTIFIER) + result += sizeof(u64); + + if (type & PERF_SAMPLE_IP) + result += sizeof(u64); + + if (type & PERF_SAMPLE_TID) + result += sizeof(u64); + + if (type & PERF_SAMPLE_TIME) + result += sizeof(u64); + + if (type & PERF_SAMPLE_ADDR) + result += sizeof(u64); + + if (type & PERF_SAMPLE_ID) + result += sizeof(u64); + + if (type & PERF_SAMPLE_STREAM_ID) + result += sizeof(u64); + + if (type & PERF_SAMPLE_CPU) + result += sizeof(u64); + + if (type & PERF_SAMPLE_PERIOD) + result += sizeof(u64); + + if (type & PERF_SAMPLE_READ) { + result += sizeof(u64); + if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) + result += sizeof(u64); + if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) + result += sizeof(u64); + /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ + if (read_format & PERF_FORMAT_GROUP) { + sz = sample->read.group.nr * + sizeof(struct sample_read_value); + result += sz; + } else { + result += sizeof(u64); + } + } + + if (type & PERF_SAMPLE_CALLCHAIN) { + sz = (sample->callchain->nr + 1) * sizeof(u64); + result += sz; + } + + if (type & PERF_SAMPLE_RAW) { + result += sizeof(u32); + result += sample->raw_size; + } + + if (type & PERF_SAMPLE_BRANCH_STACK) { + sz = sample->branch_stack->nr * sizeof(struct branch_entry); + sz += sizeof(u64); + result += sz; + } + + if (type & PERF_SAMPLE_REGS_USER) { + if (sample->user_regs.abi) { + result += sizeof(u64); + sz = hweight_long(sample_regs_user) * sizeof(u64); + result += sz; + } else { + result += sizeof(u64); + } + } + + if (type & PERF_SAMPLE_STACK_USER) { + sz = sample->user_stack.size; + result += sizeof(u64); + if (sz) { + result += sz; + result += sizeof(u64); + } + } + + if (type & PERF_SAMPLE_WEIGHT) + result += sizeof(u64); + + if (type & PERF_SAMPLE_DATA_SRC) + result += sizeof(u64); + + return result; +} + int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 sample_regs_user, u64 read_format, const struct perf_sample *sample, -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/