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| author | Shrikanth Hegde <sshegde@linux.ibm.com> | 2025-01-03 10:36:47 +0100 |
|---|---|---|
| committer | Steven Rostedt (Google) <rostedt@goodmis.org> | 2025-01-14 15:44:33 +0100 |
| commit | 24e0e610400aa2c765ee87b1b3c1401732b20fc5 (patch) | |
| tree | 10477c6787ec267f55ed71cf7ffa6107b1706201 /kernel | |
| parent | tracing: Fix irqsoff and wakeup latency tracers when using function graph (diff) | |
| download | linux-24e0e610400aa2c765ee87b1b3c1401732b20fc5.tar.xz linux-24e0e610400aa2c765ee87b1b3c1401732b20fc5.zip | |
tracing: Print lazy preemption model
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)
^^^^
Now that lazy preemption is part of the kernel, make sure the tracing
infrastructure reflects that.
Link: https://lore.kernel.org/20250103093647.575919-1-sshegde@linux.ibm.com
Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/trace.c | 1 |
1 files changed, 1 insertions, 0 deletions
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 */ |