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SubjectRe: [PATCH 4/5] perf kvm: option to print events that exceed a threshold
On 8/7/13 3:27 PM, Arnaldo Carvalho de Melo wrote:
> Em Mon, Aug 05, 2013 at 09:41:36PM -0400, David Ahern escreveu:
>> This is useful to spot high latency blips. It is normal for HLT
>> reasons to have long exit times, so strip those from the threshold
>> check.
>
> So 'perf trace' has a similar option:
>
> [acme@zoo linux]$ perf trace --help
> <SNIP>
> --duration <float>
> show only events with duration > N.M ms
> <SNIP>
>
> While you used:
>
>> + OPT_U64('T', "threshold", &kvm->threshold,
>> + "show events other than HALT that take longer than threshold usecs"),
>
> I prefer 'duration', and haven't assigned a single letter to it, they
> are scarce and we have shell long option completion, what do you think?
>
> The term was chosen, for 'perf trace' on the original patchset:
>
> http://lwn.net/Articles/415728/
>
> - Arnaldo
>

No preference really. I need to send out an update to the man page. I
can update this patch as well and re-send.

David


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