From: Tom Tromey <tromey@redhat.com>
To: psmith@gnu.org
Cc: Pedro Alves <palves@redhat.com>, gdb@sourceware.org
Subject: Re: [GDB 7.6/GCC 4.8.0] Slowdown in GDB macro processing for cores?
Date: Wed, 22 May 2013 20:12:00 -0000 [thread overview]
Message-ID: <87wqqqg4e2.fsf@fleche.redhat.com> (raw)
In-Reply-To: <1369250399.7209.164.camel@homebase> (Paul Smith's message of "Wed, 22 May 2013 15:19:59 -0400")
>>>>> "Paul" == Paul Smith <psmith@gnu.org> writes:
Paul> The interesting thing is both versions are constantly seeking and
Paul> reading to exactly the same location, over and over again. However GDB
Paul> 4.6 does it many times more than GDB 7.5.1. For example, I get this
Paul> combo:
Paul> 14:51:34.423582 lseek(7, 26763264, SEEK_SET) = 26763264 <0.000004>
Paul> 14:51:34.423609 read(7,
Paul> "P\361\236\0\0\0\0\0`\361\236\0\0\0\0\0p\361\236\0\0\0\0\0\200\361\236\0\0\0\0\0"...,
Paul> 4096) = 4096 <0.000015>
A backtrace from one of these seeks or reads might be useful.
Or, gprof.
Tom
next prev parent reply other threads:[~2013-05-22 20:12 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-16 19:42 Paul Smith
2013-05-17 10:15 ` Pedro Alves
2013-05-22 18:50 ` Paul Smith
2013-05-22 19:20 ` Paul Smith
2013-05-22 20:12 ` Tom Tromey [this message]
2013-05-22 20:52 ` Paul Smith
2013-05-22 21:02 ` Paul Smith
2013-05-22 23:14 ` Paul Smith
2013-05-23 2:44 ` Doug Evans
2013-05-23 4:41 ` Paul Smith
2013-05-28 17:11 ` Doug Evans
2013-05-28 17:33 ` Paul Smith
2013-05-28 17:40 ` Doug Evans
2013-05-28 17:53 ` Paul Smith
2013-05-28 18:03 ` Doug Evans
2013-05-28 15:25 ` Paul Smith
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