On Tue, 4 Mar 2025 09:16:11 +0100 Tomas Glozar <tglo...@redhat.com> wrote:
> út 4. 3. 2025 v 9:00 odesílatel Tomas Glozar <tglo...@redhat.com> napsal: > > > > So we need to stop tracing here, before we save the trace, if we want > > to do that. Perhaps combining this with the cleanup patch [1] and > > doing the stopping in save_trace_to_file would make sense? > > > > Also, the patch will also save the trace if running with -a and the > threshold was not violated, which is not what one usually wants, e.g.: > > $ rtla osnoise top -c 0 -q -a 10000000 -d 5s > Operating System Noise > > duration: 0 00:00:05 | time is in us > CPU Period Runtime Noise % CPU Aval Max Noise Max > Single HW NMI IRQ Softirq Threa > d > 0 #4 4000000 37712 99.05720 10998 > 555 7624 0 4011 34 2 > 4 > Saving trace to osnoise_trace.txt > > I believe it would be better to add a new option, something like > --force-trace, that would be used to save the trace even if there is > no threshold violation. -t/--trace and -a could then be used with the > same semantics as before. As long is this is what you expect to happen. I just wanted to point out that recording the trace while it is active means it may never stop recording. If that is OK, then I'm fine with the change. -- Steve
