From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753015AbaHKIyP (ORCPT ); Mon, 11 Aug 2014 04:54:15 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33539 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751671AbaHKIu4 (ORCPT ); Mon, 11 Aug 2014 04:50:56 -0400 From: Jiri Olsa To: linux-kernel@vger.kernel.org Cc: Jiri Olsa , Adrian Hunter , Arnaldo Carvalho de Melo , Corey Ashford , David Ahern , Frederic Weisbecker , Ingo Molnar , Jean Pihet , Namhyung Kim , Paul Mackerras , Peter Zijlstra Subject: [PATCH 10/20] perf top: Add support to see event's ERR and HUP poll errors Date: Mon, 11 Aug 2014 10:50:04 +0200 Message-Id: <1407747014-18394-11-git-send-email-jolsa@kernel.org> In-Reply-To: <1407747014-18394-1-git-send-email-jolsa@kernel.org> References: <1407747014-18394-1-git-send-email-jolsa@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adding top command support to see when all events are down and forcing it to stop in that case. Like following top session will stop if the monitored pid (1234) exits: $ perf top -p 1234 Cc: Adrian Hunter 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/builtin-top.c | 30 ++++++++++++++++++++++++++++-- 1 file changed, 28 insertions(+), 2 deletions(-) diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 4cd56c9ddedc..d0eeeb7ca5ff 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -40,6 +40,7 @@ #include "util/xyarray.h" #include "util/sort.h" #include "util/intlist.h" +#include "util/poller.h" #include "arch/common.h" #include "util/debug.h" @@ -875,6 +876,12 @@ try_again: ui__error("%s\n", msg); goto out_err; } + + if (perf_evsel__set_poller(counter, &evlist->poller)) { + error("failed to set poller with %d (%s)\n", errno, + strerror(errno)); + goto out_err; + } } if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) { @@ -906,11 +913,28 @@ static int perf_top__setup_sample_type(struct perf_top *top __maybe_unused) return 0; } +static int data_error(struct poller *p, struct poller_item *item) +{ + pr_debug("got HUP/ERROR on fd %d\n", item->fd); + + poller__del(p, item); + if (poller__empty(p)) { + pr_debug("All events closed shutting down.\n"); + done = 1; + } + return 0; +} + static int __cmd_top(struct perf_top *top) { struct record_opts *opts = &top->record_opts; pthread_t thread; int ret; + struct poller *poller = &top->evlist->poller; + struct poller_ops poller_ops = { + .error = data_error, + .hup = data_error, + }; top->session = perf_session__new(NULL, false, NULL); if (top->session == NULL) @@ -948,8 +972,10 @@ static int __cmd_top(struct perf_top *top) if (!target__none(&opts->target)) perf_evlist__enable(top->evlist); + poller__set_ops(poller, &poller_ops); + /* Wait for a minimal set of events before starting the snapshot */ - poll(top->evlist->pollfd, top->evlist->nr_fds, 100); + poller__poll(poller, 100); perf_top__mmap_read(top); @@ -976,7 +1002,7 @@ static int __cmd_top(struct perf_top *top) perf_top__mmap_read(top); if (hits == top->samples) - ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100); + ret = poller__poll(poller, 100); } ret = 0; -- 1.8.3.1