From: Shrikanth Hegde <sshegde@linux.ibm.com>
To: rostedt@goodmis.org, mhiramat@kernel.org
Cc: sshegde@linux.ibm.com, mark.rutland@arm.com,
linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] ftrace: print lazy preemption model
Date: Fri, 3 Jan 2025 15:06:47 +0530 [thread overview]
Message-ID: <20250103093647.575919-1-sshegde@linux.ibm.com> (raw)
Print lazy preemption model in ftrace header when latency-format=1.
cat /sys/kernel/debug/sched/preempt
none voluntary full (lazy)
Without patch:
latency: 0 us, #232946/232946, CPU#40 | (M:unknown VP:0, KP:0, SP:0 HP:0 #P:80)
With Patch:
latency: 0 us, #1897938/25566788, CPU#16 | (M:lazy VP:0, KP:0, SP:0 HP:0 #P:80)
Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
---
kernel/trace/trace.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index f8aebcb01e62..b6e40e8791fa 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -4122,6 +4122,7 @@ print_trace_header(struct seq_file *m, struct trace_iterator *iter)
preempt_model_none() ? "server" :
preempt_model_voluntary() ? "desktop" :
preempt_model_full() ? "preempt" :
+ preempt_model_lazy() ? "lazy" :
preempt_model_rt() ? "preempt_rt" :
"unknown",
/* These are reserved for later use */
--
2.39.3
next reply other threads:[~2025-01-03 9:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-03 9:36 Shrikanth Hegde [this message]
2025-01-06 13:24 ` Masami Hiramatsu
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