From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754371Ab3HEQ4r (ORCPT ); Mon, 5 Aug 2013 12:56:47 -0400 Received: from mx1.redhat.com ([209.132.183.28]:17367 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753825Ab3HEQ4p (ORCPT ); Mon, 5 Aug 2013 12:56:45 -0400 Date: Mon, 5 Aug 2013 18:50:56 +0200 From: Oleg Nesterov To: Ingo Molnar Cc: Steven Rostedt , Frederic Weisbecker , Peter Zijlstra , David Ahern , Masami Hiramatsu , "zhangwei(Jovi)" , linux-kernel@vger.kernel.org Subject: [PATCH 1/3] tracing/perf: Expand TRACE_EVENT(sched_stat_runtime) Message-ID: <20130805165056.GA6366@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20130805165034.GA6344@redhat.com> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org To simplify the review of the next patches: 1. We are going to reimplent __perf_task/counter and embedd them into TP_ARGS(). expand TRACE_EVENT(sched_stat_runtime) into DECLARE_EVENT_CLASS() + DEFINE_EVENT(), this way they can use different TP_ARGS's. 2. Change perf_trace_##call() macro to do perf_fetch_caller_regs() right before perf_trace_buf_prepare(). This way it evaluates TP_ARGS() asap, the next patch explores this fact. Note: after 87f44bbc perf_trace_buf_prepare() doesn't need "struct pt_regs *regs", perhaps it makes sense to remove this argument. And perhaps we can teach perf_trace_buf_submit() to accept regs == NULL and do fetch_caller_regs(CALLER_ADDR1) in this case. 3. Cosmetic, but the typecast from "void*" buys nothing. It just adds the noise, remove it. Signed-off-by: Oleg Nesterov Tested-by: David Ahern Reviewed-and-Acked-by: Steven Rostedt --- include/trace/events/sched.h | 6 +++++- include/trace/ftrace.h | 7 +++---- 2 files changed, 8 insertions(+), 5 deletions(-) diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index e5586ca..249c024 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -372,7 +372,7 @@ DEFINE_EVENT(sched_stat_template, sched_stat_blocked, * Tracepoint for accounting runtime (time the task is executing * on a CPU). */ -TRACE_EVENT(sched_stat_runtime, +DECLARE_EVENT_CLASS(sched_stat_runtime, TP_PROTO(struct task_struct *tsk, u64 runtime, u64 vruntime), @@ -401,6 +401,10 @@ TRACE_EVENT(sched_stat_runtime, (unsigned long long)__entry->vruntime) ); +DEFINE_EVENT(sched_stat_runtime, sched_stat_runtime, + TP_PROTO(struct task_struct *tsk, u64 runtime, u64 vruntime), + TP_ARGS(tsk, runtime, vruntime)); + /* * Tracepoint for showing priority inheritance modifying a tasks * priority. diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h index 41a6643..618af05 100644 --- a/include/trace/ftrace.h +++ b/include/trace/ftrace.h @@ -663,15 +663,14 @@ perf_trace_##call(void *__data, proto) \ int __data_size; \ int rctx; \ \ - perf_fetch_caller_regs(&__regs); \ - \ __data_size = ftrace_get_offsets_##call(&__data_offsets, args); \ __entry_size = ALIGN(__data_size + sizeof(*entry) + sizeof(u32),\ sizeof(u64)); \ __entry_size -= sizeof(u32); \ \ - entry = (struct ftrace_raw_##call *)perf_trace_buf_prepare( \ - __entry_size, event_call->event.type, &__regs, &rctx); \ + perf_fetch_caller_regs(&__regs); \ + entry = perf_trace_buf_prepare(__entry_size, \ + event_call->event.type, &__regs, &rctx); \ if (!entry) \ return; \ \ -- 1.5.5.1