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Date: Mon, 27 Nov 2017 14:35:19 +1100 (EST)
From: Bruce Evans <brde@optusnet.com.au>
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To: Edward Tomasz Napierala <trasz@freebsd.org>
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Subject: Re: svn commit: r326125 - head/usr.sbin/kgmon
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On Sun, 26 Nov 2017, Edward Tomasz Napierala wrote:

> On 1124T0138, Bruce Evans wrote:
>> On Thu, 23 Nov 2017, Edward Tomasz Napierala wrote:
>>
>>> Log:
>>>  Mark kgmon(8) obsolete, redirecting users to pmcstat(8).
>>
>> It isn't obsolete.  pmcstat can't do at least full (non-statistical)
>> call graphs and high-resolution profiling.
>
> [snip detailed explanation]
>
> Thanks.  Based on your arguments (and on the fact that I've tried
> again to use it, following instructions from the URL below[1], and
> this time it actually worked), I think I'll revert this commit,
> and just add an ".Xr pmcstat 8" instead.

Thanks.

> 1. http://lserinol.blogspot.co.uk/2009/01/freebsd-kernel-profiling-with-kgmon.html

This is very basic (only the about confinguration), but that makes it short
enough to put in a section 4 man page or just in kgdb(8).  I don't know of
any tutorial for how to use either kgmon or pmcstat.

Bruce