Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758243AbaKUJcB (ORCPT ); Fri, 21 Nov 2014 04:32:01 -0500 Received: from mx1.redhat.com ([209.132.183.28]:43222 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758145AbaKUJb5 (ORCPT ); Fri, 21 Nov 2014 04:31:57 -0500 From: Jiri Olsa To: linux-kernel@vger.kernel.org Cc: Jiri Olsa , Andi Kleen , Arnaldo Carvalho de Melo , Corey Ashford , David Ahern , Frederic Weisbecker , Ingo Molnar , Matt Fleming , Namhyung Kim , Paul Mackerras , Peter Zijlstra , Stephane Eranian Subject: [PATCH 03/11] perf tools: Introduce perf_evsel__read_cb function Date: Fri, 21 Nov 2014 10:31:07 +0100 Message-Id: <1416562275-12404-4-git-send-email-jolsa@kernel.org> In-Reply-To: <1416562275-12404-1-git-send-email-jolsa@kernel.org> References: <1416562275-12404-1-git-send-email-jolsa@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adding perf_evsel__read_cb read function that retuns count values via callback. It will be used later in stat command as single way to retrieve counter values. Cc: Andi Kleen Cc: Arnaldo Carvalho de Melo Cc: Corey Ashford Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Matt Fleming Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Signed-off-by: Jiri Olsa --- tools/perf/util/evsel.c | 16 ++++++++++++++++ tools/perf/util/evsel.h | 7 +++++++ 2 files changed, 23 insertions(+) diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 6dc7a67e6d35..2d26b7ad6fe0 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -917,6 +917,22 @@ void perf_counts_values__scale(struct perf_counts_values *count, *pscaled = scaled; } +int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread, + perf_evsel__read_cb_t cb) +{ + struct perf_counts_values count; + + memset(&count, 0, sizeof(count)); + + if (FD(evsel, cpu, thread) < 0) + return -EINVAL; + + if (readn(FD(evsel, cpu, thread), &count, sizeof(count)) < 0) + return -errno; + + return cb(evsel, cpu, thread, &count); +} + int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, int cpu, int thread, bool scale) { diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h index 7af0377ceb18..5c93bed8e8d9 100644 --- a/tools/perf/util/evsel.h +++ b/tools/perf/util/evsel.h @@ -233,6 +233,13 @@ static inline bool perf_evsel__match2(struct perf_evsel *e1, (a)->attr.type == (b)->attr.type && \ (a)->attr.config == (b)->attr.config) +typedef int (perf_evsel__read_cb_t)(struct perf_evsel *evsel, + int cpu, int thread, + struct perf_counts_values *count); + +int perf_evsel__read_cb(struct perf_evsel *evsel, int cpu, int thread, + perf_evsel__read_cb_t cb); + int __perf_evsel__read_on_cpu(struct perf_evsel *evsel, int cpu, int thread, bool scale); -- 1.9.3 -- 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/