From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752653Ab2A2I4p (ORCPT ); Sun, 29 Jan 2012 03:56:45 -0500 Received: from mail-pw0-f46.google.com ([209.85.160.46]:59349 "EHLO mail-pw0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751847Ab2A2I4F (ORCPT ); Sun, 29 Jan 2012 03:56:05 -0500 From: Namhyung Kim To: Arnaldo Carvalho de Melo Cc: Peter Zijlstra , Paul Mackerras , Ingo Molnar , linux-kernel@vger.kernel.org Subject: [PATCH 2/5] perf record: Add error message for EMFILE Date: Sun, 29 Jan 2012 17:55:53 +0900 Message-Id: <1327827356-8786-2-git-send-email-namhyung@gmail.com> X-Mailer: git-send-email 1.7.8.2 In-Reply-To: <1327827356-8786-1-git-send-email-namhyung@gmail.com> References: <1327827356-8786-1-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 32870eef952f..5d3b6794d93b 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -249,6 +249,10 @@ 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