Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752534AbaGTV5W (ORCPT ); Sun, 20 Jul 2014 17:57:22 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35342 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752485AbaGTV5Q (ORCPT ); Sun, 20 Jul 2014 17:57:16 -0400 From: Jiri Olsa To: linux-kernel@vger.kernel.org Cc: Jiri Olsa , Arnaldo Carvalho de Melo , Corey Ashford , David Ahern , Frederic Weisbecker , Ingo Molnar , Jean Pihet , Namhyung Kim , Paul Mackerras , Peter Zijlstra Subject: [PATCH 19/19] perf tools: Allow out of order messages in forced flush Date: Sun, 20 Jul 2014 23:56:03 +0200 Message-Id: <1405893363-21967-20-git-send-email-jolsa@kernel.org> In-Reply-To: <1405893363-21967-1-git-send-email-jolsa@kernel.org> References: <1405893363-21967-1-git-send-email-jolsa@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In forced flush (OE_FLUSH__HALF) we break the rules of the flush timestamp via PERF_RECORD_FINISHED_ROUND event, so we could get out of order event. Do not force error in this case plus changing the output warning to use WARN_ONCE. Cc: Arnaldo Carvalho de Melo Cc: Corey Ashford Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jean Pihet Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Signed-off-by: Jiri Olsa --- tools/perf/util/ordered-events.c | 4 ++++ tools/perf/util/ordered-events.h | 2 ++ tools/perf/util/session.c | 8 ++++++-- 3 files changed, 12 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/ordered-events.c b/tools/perf/util/ordered-events.c index d7ee387cad51..5dbde56d69f6 100644 --- a/tools/perf/util/ordered-events.c +++ b/tools/perf/util/ordered-events.c @@ -181,6 +181,7 @@ int ordered_events_flush(struct perf_session *s, struct perf_tool *tool, { struct ordered_events *oe = &s->ordered_events; static const char * const str[] = { + "NONE", "FINAL", "ROUND", "HALF ", @@ -210,6 +211,7 @@ int ordered_events_flush(struct perf_session *s, struct perf_tool *tool, } case OE_FLUSH__ROUND: + case OE_FLUSH__NONE: default: break; }; @@ -226,6 +228,8 @@ int ordered_events_flush(struct perf_session *s, struct perf_tool *tool, if (!err) { if (how == OE_FLUSH__ROUND) oe->next_flush = oe->max_timestamp; + + oe->last_flush_type = how; } if (unlikely(debug_ordered_events)) { diff --git a/tools/perf/util/ordered-events.h b/tools/perf/util/ordered-events.h index a4fc435f0fc6..6dd36dd01be6 100644 --- a/tools/perf/util/ordered-events.h +++ b/tools/perf/util/ordered-events.h @@ -14,6 +14,7 @@ struct ordered_event { }; enum oe_flush { + OE_FLUSH__NONE, OE_FLUSH__FINAL, OE_FLUSH__ROUND, OE_FLUSH__HALF, @@ -32,6 +33,7 @@ struct ordered_events { struct ordered_event *last; int buffer_idx; unsigned int nr_events; + enum oe_flush last_flush_type; }; struct ordered_event *ordered_events_new(struct ordered_events *oe, u64 timestamp); diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 4e748142a13f..3db8ab12f12d 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -15,6 +15,7 @@ #include "cpumap.h" #include "perf_regs.h" #include "vdso.h" +#include "asm/bug.h" static int perf_session__open(struct perf_session *session) { @@ -502,8 +503,11 @@ int perf_session_queue_event(struct perf_session *s, union perf_event *event, return -ETIME; if (timestamp < s->ordered_events.last_flush) { - printf("Warning: Timestamp below last timeslice flush\n"); - return -EINVAL; + WARN_ONCE(1, "Timestamp below last timeslice flush\n"); + + /* We could get out of order messages after forced flush. */ + if (oe->last_flush_type != OE_FLUSH__HALF) + return -EINVAL; } new = ordered_events_new(oe, timestamp); -- 1.8.3.1 -- 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/