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From: Tom Tromey <tromey@redhat.com>
To: Pedro Alves <pedro@codesourcery.com>
Cc: "Ulrich Weigand" <uweigand@de.ibm.com>,
	       Markus Alber <markus@hyperion-imrt.org>,
	       Michael Snyder <msnyder@vmware.com>,
	gdb@sourceware.org
Subject: Re: performance of multithreading gets gradually worse under gdb
Date: Fri, 04 Feb 2011 15:26:00 -0000	[thread overview]
Message-ID: <m34o8jddod.fsf@fleche.redhat.com> (raw)
In-Reply-To: <201102041455.20607.pedro@codesourcery.com> (Pedro Alves's	message of "Fri, 4 Feb 2011 14:55:20 +0000")

Pedro> Yeah.  And only clear current_regcache_ptid if it was deleted in the
Pedro> first place; and only reinit the frame cache if we deleted the
Pedro> regcache of inferior_ptid ?  Like the patch below.

Yeah, this looks reasonable to me.

Pedro> We have targets that do thread<->lwp ptid translation between
Pedro> thread/proc stratum layers, and random places that do
Pedro> get_thread_regcache (ptid) behind the core's back -- it appears
Pedro> aix-thread.c could be one of those.
Pedro> Another example: linux-nat.c:cancel_breakpoint builds
Pedro> regcaches for lwps before linux-thread-db.c (if active at all)
Pedro> has had a chance of telling the core about new
Pedro> threads (in all-stop mode).

Thanks for pointing this out.  I have a lot to learn in this area.

One somewhat distressing thing is that my patch did not cause any
regressions.

Tom


  parent reply	other threads:[~2011-02-04 15:26 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-02 20:16 Markus Alber
2011-02-02 20:28 ` Michael Snyder
     [not found]   ` <76bccf1875854ebc69b6a892fb84a976@hyperion-imrt.org>
2011-02-02 21:43     ` Michael Snyder
2011-02-03  7:03       ` Markus Alber
2011-02-03 20:26         ` Michael Snyder
2011-02-03 20:52           ` Markus Alber
2011-02-03 20:57         ` Tom Tromey
2011-02-03 21:00           ` Tom Tromey
2011-02-03 21:40           ` Ulrich Weigand
2011-02-03 22:04             ` Tom Tromey
2011-02-04 13:49               ` Ulrich Weigand
2011-02-04 14:55             ` Pedro Alves
2011-02-04 15:13               ` Ulrich Weigand
2011-02-04 15:26               ` Tom Tromey [this message]
2011-02-04 15:56                 ` Pedro Alves
     [not found]                 ` <201102041555.52179.pedro__21913.9744448059$1296834976$gmane$org@codesourcery.com>
2011-02-04 17:02                   ` Tom Tromey
2011-02-05  9:34                     ` Markus Alber
2011-02-07 14:05                     ` Markus Alber

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