Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758666Ab3GRKhM (ORCPT ); Thu, 18 Jul 2013 06:37:12 -0400 Received: from mga09.intel.com ([134.134.136.24]:56267 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932307Ab3GRKhH (ORCPT ); Thu, 18 Jul 2013 06:37:07 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.89,692,1367996400"; d="scan'208";a="347700890" From: Adrian Hunter To: Arnaldo Carvalho de Melo Cc: linux-kernel@vger.kernel.org, David Ahern , Frederic Weisbecker , Jiri Olsa , Mike Galbraith , Namhyung Kim , Paul Mackerras , Peter Zijlstra , Stephane Eranian , Ingo Molnar Subject: [PATCH V8 14/15] perf tools: add a function to calculate sample event size Date: Thu, 18 Jul 2013 13:42:56 +0300 Message-Id: <1374144177-24762-15-git-send-email-adrian.hunter@intel.com> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1374144177-24762-1-git-send-email-adrian.hunter@intel.com> References: <1374144177-24762-1-git-send-email-adrian.hunter@intel.com> Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3375 Lines: 123 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 --- tools/perf/util/event.h | 2 ++ tools/perf/util/evsel.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 83 insertions(+) diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h index 7f5c36b..c49cb4c 100644 --- a/tools/perf/util/event.h +++ b/tools/perf/util/event.h @@ -227,6 +227,8 @@ 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); int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 sample_regs_user, const struct perf_sample *sample, diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 047ab02..7a5ff06 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -1348,6 +1348,87 @@ 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) +{ + 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) { + fprintf(stderr, "PERF_SAMPLE_READ is unsupported for now\n"); + result += 8192; /* To be on the safe side */ + } + + 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.regs && sample_regs_user) { + 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, const struct perf_sample *sample, -- 1.7.11.7 -- 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/