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Re: Issues using statprof (no samples taken)
From: |
Ludovic Courtès |
Subject: |
Re: Issues using statprof (no samples taken) |
Date: |
Mon, 17 Nov 2008 16:10:12 +0100 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.3 (gnu/linux) |
Hi,
Boris Zbarsky <address@hidden> writes:
> profile-signal-handler is not getting called. I do see a SIGPROF
> delivered to the gnucash-bin process (using 'handle SIGPROF stop' in
> gdb after attaching to the gnucash-bin process), but only once during
> the entire report generation. I also see scm_setitimer called in gdb
> at a point in the scheme code that matches the call to
> (statprof-start), and I see it called again at the point that matches
> (statprof-stop). The single SIGPROF delivered comes soon after that
> first setitimer call.
GDB supposedly shows all SIGPROFs that are raised, so if it shows only
one, then something's wrong. Can you check the arguments passed to
`setitimer(2)' to make sure it makes sense? Perhaps you could also try
increasing the sampling frequency, although that's arguably not
required.
Another (remote) possibility could be that the Scheme-level handler is
not called, even though the C handler in libguile is called, since
Scheme-level signal handlers are actually asyncs (info "(guile)
Asyncs"). You can try to force the execution of asyncs by adding a call
like "(select '() '() '() 0)" (technically, it invokes `SCM_TICK', which
runs asyncs).
One last thing would be to check whether `HAVE_SIGACTION' is defined in
Guile's <config.h> on your platform, to see which version of
`scm_sigaction_for_thread ()' is used.
Thanks,
Ludo'.
- Issues using statprof (no samples taken), Boris Zbarsky, 2008/11/14
- Re: Issues using statprof (no samples taken), Ludovic Courtès, 2008/11/14
- Re: Issues using statprof (no samples taken), Boris Zbarsky, 2008/11/16
- Re: Issues using statprof (no samples taken),
Ludovic Courtès <=
- Re: Issues using statprof (no samples taken), Boris Zbarsky, 2008/11/17
- Re: Issues using statprof (no samples taken), Ludovic Courtès, 2008/11/17
- Re: Issues using statprof (no samples taken), Boris Zbarsky, 2008/11/17
- Re: Issues using statprof (no samples taken), Ludovic Courtès, 2008/11/18
- Re: Issues using statprof (no samples taken), Boris Zbarsky, 2008/11/18
- Re: Issues using statprof (no samples taken), Ludovic Courtès, 2008/11/18
- Re: Issues using statprof (no samples taken), Boris Zbarsky, 2008/11/20