From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754028Ab2AHPzj (ORCPT ); Sun, 8 Jan 2012 10:55:39 -0500 Received: from mail-iy0-f174.google.com ([209.85.210.174]:39552 "EHLO mail-iy0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753972Ab2AHPze (ORCPT ); Sun, 8 Jan 2012 10:55:34 -0500 From: Namhyung Kim To: Arnaldo Carvalho de Melo Cc: Peter Zijlstra , Paul Mackerras , Ingo Molnar , linux-kernel@vger.kernel.org Subject: [PATCH 2/3] perf record: Add error message for EMFILE Date: Mon, 9 Jan 2012 00:55:24 +0900 Message-Id: <1326038125-2929-2-git-send-email-namhyung@gmail.com> X-Mailer: git-send-email 1.7.8.2 In-Reply-To: <1326038125-2929-1-git-send-email-namhyung@gmail.com> References: <1326038125-2929-1-git-send-email-namhyung@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When a user tries to open so many events, perf_event_oen syscall may fail with EMFILE. Provide an advice for that case. Signed-off-by: Namhyung Kim --- tools/perf/builtin-record.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 0abfb18b911f..d47b8277ca78 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -248,6 +248,10 @@ try_again: ui__warning("The %s event is not supported.\n", event_name(pos)); exit(EXIT_FAILURE); + } else if (err == EMFILE) { + ui__warning("Too many events are opened.\n" + "Try again after reducing the number of events.\n"); + exit(EXIT_FAILURE); } printf("\n"); -- 1.7.8.2