Date: Thu, 23 Mar 2023 17:41:04 -0700 From: Pete Wright <pete@nomadlogic.org> To: Tomek CEDRO <tomek@cedro.info> Cc: FreeBSD Questions Mailing List <freebsd-questions@freebsd.org> Subject: Re: userland profiler trace with debug symbols Message-ID: <dd17a12d-c7d5-2eb8-6a4b-ea9bffd583d3@nomadlogic.org> In-Reply-To: <CAFYkXjmKyc8qgAhGtN8UrLxD4vUJ=Yz7FZsd27h7oO84VLVcoQ@mail.gmail.com> References: <CAFYkXjkuwQviXbJ1nbB3qpST5tTAvjO4br-QEo=6t3M0VB7z3A@mail.gmail.com> <20230323204533.z3vd3tk37hgbludi@topanga> <CAFYkXjmKyc8qgAhGtN8UrLxD4vUJ=Yz7FZsd27h7oO84VLVcoQ@mail.gmail.com>
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On 3/23/23 17:09, Tomek CEDRO wrote: > On Thu, Mar 23, 2023 at 9:45 PM Pete Wright wrote: >> On Thu, Mar 23, 2023 at 12:07:28AM +0100, Tomek CEDRO wrote: >>> Hello world :-) >>> >>> I have found and reported a bug in KiCAD 7 where dialogs seems to be >>> broken [1]. One of the upstream developers asked me to create a >>> "profiler trace with debug symbols" to pinpoint the issue. >>> >>> Here is an example use on Linux with perf [2]: >>> >>> perf record --debuginfod --call-graph dwarf -F 999 -g eeschema >>> >>> Do we have this kind of utility on FreeBSD? :-) >> you can probably supply similar info using dtrace(1). there is also dwatch(1) >> which is a handy script that pulls lots of useful info via dtrace, but in a >> more user friendly way. >> >> -pete > Thank you Pete! > > I also found dtrace.. but it looks kind of black magic for a newcomer :-P > > I found only this reference with some examples: > > https://www.oracle.com/application-development/technologies/solarisstudio-documentation-dtrace-studio.html > > Do you know a good reference / manual / tutorial / book with exapmles > to learn dtrace? :-) :-) > yea i think dtrace certainly has a steep learning curve (but imho it is also way more powerful than the old linux perf utility). i would suggest starting by checking out dwatch which may cover some of the use cases you are looking to investigate. its included with the base system and has a good man page. there is also the dtrace toolkit: https://github.com/opendtrace/toolkit you can install this via pkg `pkg install dtrace-toolkit` - this includes a bunch of examples which you may be able to adapt for your use. i also bet there are peeps on the various freebsd mailing lists and on discord/irc that are way more knowledgeable than me who might be able to help too. hope this helps, -pete -- Pete Wright pete@nomadlogic.org @nomadlogicLA
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