From: Jan Kratochvil <jan.kratochvil@redhat.com>
To: "Metzger, Markus T" <markus.t.metzger@intel.com>
Cc: "gdb-patches@sourceware.org" <gdb-patches@sourceware.org>
Subject: Re: [patch v6 21/21] record-btrace: add (reverse-)stepping support
Date: Tue, 26 Nov 2013 13:48:00 -0000 [thread overview]
Message-ID: <20131126123759.GA16244@host2.jankratochvil.net> (raw)
In-Reply-To: <A78C989F6D9628469189715575E55B230AA11A0D@IRSMSX104.ger.corp.intel.com>
On Wed, 06 Nov 2013 14:48:29 +0100, Metzger, Markus T wrote:
> > I would see it worth a comment even in
> > (gdb) help record btrace
> > Start branch trace recording.
>
> I don't think that this is necessary or helpful. If we start documenting the
> trace size here, we should also say that trace is collected per thread with
> no correlation between threads and that tracing induces a run-time overhead
> and that it may also affect thread interleaving which may cause bug symptoms
> to disappear, and ....
Tom for example recently added a TODO item to fix it all in general:
https://sourceware.org/gdb/wiki/ProjectIdeas?action=diff&rev1=57&rev2=58
More text is better than less text. But I do not insist on that.
Thanks,
Jan
next prev parent reply other threads:[~2013-11-26 12:39 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-20 11:30 [patch v6 00/21] record-btrace: reverse Markus Metzger
2013-09-20 11:30 ` [patch v6 02/21] gdbarch: add instruction predicate methods Markus Metzger
2013-09-20 11:30 ` [patch v6 14/21] record-btrace: provide xfer_partial target method Markus Metzger
2013-09-20 11:30 ` [patch v6 15/21] record-btrace: add to_wait and to_resume target methods Markus Metzger
2013-09-20 11:30 ` [patch v6 16/21] record-btrace: provide target_find_new_threads method Markus Metzger
2013-09-20 11:30 ` [patch v6 10/21] target: add ops parameter to to_prepare_to_store method Markus Metzger
2013-09-20 11:30 ` [patch v6 12/21] frame, backtrace: allow targets to supply a frame unwinder Markus Metzger
2013-09-20 11:30 ` [patch v6 06/21] btrace: increase buffer size Markus Metzger
2013-09-20 11:31 ` [patch v6 17/21] record-btrace: add record goto target methods Markus Metzger
2013-10-06 19:48 ` Jan Kratochvil
2013-09-20 11:31 ` [patch v6 09/21] btrace: add replay position to btrace thread info Markus Metzger
2013-09-20 11:31 ` [patch v6 11/21] record-btrace: supply register target methods Markus Metzger
2013-09-20 11:31 ` [patch v6 20/21] record-btrace: show trace from enable location Markus Metzger
2013-09-20 11:31 ` [patch v6 21/21] record-btrace: add (reverse-)stepping support Markus Metzger
2013-10-06 19:52 ` Jan Kratochvil
2013-11-06 15:06 ` Metzger, Markus T
2013-11-26 13:48 ` Jan Kratochvil [this message]
2013-09-20 11:31 ` [patch v6 04/21] record-btrace: fix insn range in function call history Markus Metzger
2013-09-20 11:31 ` [patch v6 08/21] record-btrace: make ranges include begin and end Markus Metzger
2013-09-20 11:31 ` [patch v6 13/21] record-btrace, frame: supply target-specific unwinder Markus Metzger
2013-09-20 11:31 ` [patch v6 19/21] btrace, gdbserver: read branch trace incrementally Markus Metzger
2013-10-06 19:51 ` Jan Kratochvil
2013-09-20 11:31 ` [patch v6 05/21] record-btrace: start counting at one Markus Metzger
2013-09-20 11:31 ` [patch v6 03/21] btrace: change branch trace data structure Markus Metzger
2013-10-06 19:46 ` Jan Kratochvil
2013-09-20 11:31 ` [patch v6 18/21] record-btrace: extend unwinder Markus Metzger
2013-10-06 19:49 ` Jan Kratochvil
2013-11-06 13:45 ` Metzger, Markus T
2013-11-25 21:11 ` Jan Kratochvil
2013-09-20 11:31 ` [patch v6 01/21] btrace, linux: fix memory leak when reading branch trace Markus Metzger
2013-09-20 11:31 ` [patch v6 07/21] record-btrace: optionally indent function call history Markus Metzger
2013-10-06 19:47 ` Jan Kratochvil
2013-09-26 19:16 ` v6 crash bugreport [Re: [patch v6 00/21] record-btrace: reverse] Jan Kratochvil
2013-09-27 6:37 ` Metzger, Markus T
2013-10-06 19:59 ` [+rfc] Re: [patch v6 00/21] record-btrace: reverse Jan Kratochvil
2013-11-07 15:44 ` Metzger, Markus T
2013-11-27 20:35 ` Jan Kratochvil
2013-11-28 10:54 ` Metzger, Markus T
2013-11-28 22:35 ` Jan Kratochvil
2013-11-29 14:27 ` Metzger, Markus T
2013-12-11 19:57 ` Jan Kratochvil
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