linux-kernel - [PATCH 4/4] trace/timerlat: Add migrate-disabled field to the timerlat header

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Message-Id: <bc0c234ab49946cdd63effa6584e1d5e8662cb44.1634308385.git.bristot@kernel.org>
Date:   Fri, 15 Oct 2021 17:07:51 +0200
From:   Daniel Bristot de Oliveira <bristot@...nel.org>
To:     Steven Rostedt <rostedt@...dmis.org>
Cc:     Daniel Bristot de Oliveira <bristot@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        x86@...nel.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 4/4] trace/timerlat: Add migrate-disabled field to the timerlat header

Since "54357f0c9149 tracing: Add migrate-disabled counter to tracing
output," the migrate disabled field is also printed in the !PREEMPR_RT
kernel config. While this information was added to the vast majority of
tracers, osnoise and timerlat were not updated (because they are new
tracers).

Fix timerlat header by adding the information about migrate disabled.

Cc: Steven Rostedt <rostedt@...dmis.org>
Cc: Daniel Bristot de Oliveira <bristot@...nel.org>
Cc: Jonathan Corbet <corbet@....net>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: x86@...nel.org
Cc: linux-doc@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Fixes: 54357f0c9149 ("tracing: Add migrate-disabled counter to tracing output.")
Signed-off-by: Daniel Bristot de Oliveira <bristot@...nel.org>
---
 kernel/trace/trace_osnoise.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
index 85852819aa0f..72765bf360ce 100644
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -378,11 +378,12 @@ static void print_timerlat_headers(struct seq_file *s)
 	seq_puts(s, "#                               / _----=> need-resched\n");
 	seq_puts(s, "#                              | / _---=> hardirq/softirq\n");
 	seq_puts(s, "#                              || / _--=> preempt-depth\n");
-	seq_puts(s, "#                              || /\n");
-	seq_puts(s, "#                              ||||             ACTIVATION\n");
-	seq_puts(s, "#           TASK-PID      CPU# ||||   TIMESTAMP    ID     ");
-	seq_puts(s, "       CONTEXT                LATENCY\n");
-	seq_puts(s, "#              | |         |   ||||      |         |      ");
+	seq_puts(s, "#                              ||| / _-=> migrate-disable\n");
+	seq_puts(s, "#                              |||| /     delay\n");
+	seq_puts(s, "#                              |||||            ACTIVATION\n");
+	seq_puts(s, "#           TASK-PID      CPU# |||||   TIMESTAMP   ID      ");
+	seq_puts(s, "      CONTEXT                 LATENCY\n");
+	seq_puts(s, "#              | |         |   |||||      |         |      ");
 	seq_puts(s, "            |                       |\n");
 }
 #endif /* CONFIG_PREEMPT_RT */
-- 
2.31.1