From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755393Ab0DNNAZ (ORCPT ); Wed, 14 Apr 2010 09:00:25 -0400 Received: from mx1.redhat.com ([209.132.183.28]:56628 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755201Ab0DNNAW (ORCPT ); Wed, 14 Apr 2010 09:00:22 -0400 From: Jiri Olsa To: mingo@elte.hu, rostedt@goodmis.org, fweisbec@gmail.com Cc: linux-kernel@vger.kernel.org, Jiri Olsa Subject: [PATCH 1/2] tracing: adding lost-events option Date: Wed, 14 Apr 2010 15:00:04 +0200 Message-Id: <1271250005-11434-2-git-send-email-jolsa@redhat.com> In-Reply-To: <1271250005-11434-1-git-send-email-jolsa@redhat.com> References: <1271250005-11434-1-git-send-email-jolsa@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org hi, adding option for control LOST EVENTS message output. wbr, jirka Signed-off-by: Jiri Olsa --- kernel/trace/trace.c | 7 +++++-- kernel/trace/trace.h | 1 + 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 60f3b62..bf00438 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -332,7 +332,7 @@ static DECLARE_WAIT_QUEUE_HEAD(trace_wait); /* trace_flags holds trace_options default values */ unsigned long trace_flags = TRACE_ITER_PRINT_PARENT | TRACE_ITER_PRINTK | TRACE_ITER_ANNOTATE | TRACE_ITER_CONTEXT_INFO | TRACE_ITER_SLEEP_TIME | - TRACE_ITER_GRAPH_TIME; + TRACE_ITER_GRAPH_TIME | TRACE_ITER_LOST_EVENTS; static int trace_stop_count; static DEFINE_SPINLOCK(tracing_start_lock); @@ -416,6 +416,7 @@ static const char *trace_options[] = { "latency-format", "sleep-time", "graph-time", + "lost-events", NULL }; @@ -2040,9 +2041,11 @@ static enum print_line_t print_trace_line(struct trace_iterator *iter) { enum print_line_t ret; - if (iter->lost_events) + if ((trace_flags & TRACE_ITER_LOST_EVENTS) && + (iter->lost_events)) { trace_seq_printf(&iter->seq, "CPU:%d [LOST %lu EVENTS]\n", iter->cpu, iter->lost_events); + } if (iter->trace && iter->trace->print_line) { ret = iter->trace->print_line(iter); diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index bec2c97..4607b43 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -606,6 +606,7 @@ enum trace_iterator_flags { TRACE_ITER_LATENCY_FMT = 0x20000, TRACE_ITER_SLEEP_TIME = 0x40000, TRACE_ITER_GRAPH_TIME = 0x80000, + TRACE_ITER_LOST_EVENTS = 0x100000, }; /* -- 1.6.6.1