From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD94DC433DB for ; Fri, 12 Mar 2021 21:15:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6DBA664F83 for ; Fri, 12 Mar 2021 21:15:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235172AbhCLVPK (ORCPT ); Fri, 12 Mar 2021 16:15:10 -0500 Received: from mail.kernel.org ([198.145.29.99]:42000 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235180AbhCLVPH (ORCPT ); Fri, 12 Mar 2021 16:15:07 -0500 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id EA40F64FC3; Fri, 12 Mar 2021 21:15:06 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.94) (envelope-from ) id 1lKp7h-000LsG-UU; Fri, 12 Mar 2021 16:15:05 -0500 Message-ID: <20210312211505.818683162@goodmis.org> User-Agent: quilt/0.66 Date: Fri, 12 Mar 2021 16:14:00 -0500 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , "Zanussi, Tom" , Masami Hiramatsu , "Yordan Karadzhov" Subject: [PATCH 7/7] tracing: Add tracing_event_time_stamp() API References: <20210312211353.422067021@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Steven Rostedt (VMware)" Add a tracing_event_time_stamp() API that checks if the event passed in is not on the ring buffer but a pointer to the per CPU trace_buffered_event which does not have its time stamp set yet. If it is a pointer to the trace_buffered_event, then just return the current time stamp that the ring buffer would produce. Otherwise, return the time stamp from the event. Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/trace.c | 10 ++++++++++ kernel/trace/trace.h | 1 + 2 files changed, 11 insertions(+) diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 8cf7397f3f56..a8d5356ed327 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -7120,6 +7120,16 @@ static int tracing_time_stamp_mode_open(struct inode *inode, struct file *file) return ret; } +u64 tracing_event_time_stamp(struct trace_array *tr, struct ring_buffer_event *rbe) +{ + struct trace_buffer *buffer = tr->array_buffer.buffer; + + if (rbe == this_cpu_read(trace_buffered_event)) + return ring_buffer_time_stamp(buffer, smp_processor_id()); + + return ring_buffer_event_time_stamp(buffer, rbe); +} + /* * Set or disable using the per CPU trace_buffer_event when possible. */ diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index de717706e863..23d85e78bef4 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -372,6 +372,7 @@ extern int tracing_check_open_get_tr(struct trace_array *tr); extern struct trace_array *trace_array_find(const char *instance); extern struct trace_array *trace_array_find_get(const char *instance); +extern u64 tracing_event_time_stamp(struct trace_array *tr, struct ring_buffer_event *rbe); extern int tracing_set_filter_buffering(struct trace_array *tr, bool set); extern int tracing_set_clock(struct trace_array *tr, const char *clockstr); -- 2.30.1