Re: pmcstat -z32 -G truncates callgraph to 8

Brendan Gregg <[email protected]> Tue, 28 Oct 2014 10:38:23 -0700

Newsgroups	gmane.os.freebsd.performance
Message-ID	<CAE40pdf6jUGEse0Mh+gV48VnwLrWS+fhO59gfzY=ocRauK43MA@mail.gmail.com>

G'Day Stefan,

On Tue, Oct 28, 2014 at 2:45 AM, Stefan Parvu
<[email protected]> wrote:
>
>> I'm using pmcstat to capture call graphs, however, these always seem
>> truncated to 8 stack frames. Anyone else hit this? Anyone know a fix
>> or workaround?
>
> On FreeBSD 11.0-CURRENT Im seeing these:
>
> kern.features.hwpmc_hooks: 1
> kern.hwpmc.softevents: 16
> kern.hwpmc.callchaindepth: 16
> kern.hwpmc.hashsize: 1024
> kern.hwpmc.nsamples: 1024
> kern.hwpmc.mtxpoolsize: 2048
> kern.hwpmc.logbuffersize: 4
> kern.hwpmc.nbuffers: 1024

Ah, thanks, I'm on 10.0-STABLE and I have:

kern.hwpmc.callchaindepth: 8

Glad it's something simple!

Brendan
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