From: Paolo Bonzini <pbonzini@redhat.com>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: Pavel Butsykin <pbutsykin@virtuozzo.com>,
Markus Armbruster <armbru@redhat.com>,
QEMU Developers <qemu-devel@nongnu.org>,
Luiz Capitulino <lcapitulino@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
"Denis V. Lunev" <den@openvz.org>
Subject: Re: [Qemu-devel] What's the intended use of log.h logging?
Date: Fri, 16 Oct 2015 17:27:52 +0200 [thread overview]
Message-ID: <56211778.8050708@redhat.com> (raw)
In-Reply-To: <CAFEAcA_hjbXzZTh0qoAnaxNCw74nnX+xznb5Q0q26tETvnJKSw@mail.gmail.com>
On 16/10/2015 16:31, Peter Maydell wrote:
> > I hadn't thought about levels, but honestly when I use KVM tracing (which
> > is often measured in tens of megabytes per run) I don't care.
>
> In a lot of cases, especially with the TCG logging, not enabling
> voluminous tracing is really important because if you turn it all
> on then the system is way too slow (and can behave differently
> as a result), and generates gigabytes of trace output. (-d exec
> and -d cpu will do this, for instance.)
Yes, but device models are going to generate orders of magnitude smaller
traces than the CPU. Since I'm not proposing to drop -d together, but
rather to integrate tracing with it, we can cross that river when we
reach it.
Paolo
next prev parent reply other threads:[~2015-10-16 15:34 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-15 7:30 [Qemu-devel] [PATCH 0/3] QEMU logging improvements Denis V. Lunev
2015-10-15 7:30 ` [Qemu-devel] [PATCH 1/3] log: improve performance of qemu_log and qemu_log_mask if disabled Denis V. Lunev
2015-10-15 17:23 ` Alex Bennée
2015-10-15 17:40 ` Denis V. Lunev
2015-10-15 18:36 ` Alex Bennée
2015-10-16 7:17 ` Markus Armbruster
2015-10-16 7:45 ` Denis V. Lunev
2015-10-16 11:02 ` Markus Armbruster
2015-10-16 11:08 ` Denis V. Lunev
2015-10-15 7:30 ` [Qemu-devel] [PATCH 2/3] log: report hmp/qmp command and qmp event Denis V. Lunev
2015-10-16 7:34 ` Markus Armbruster
2015-10-16 9:51 ` Pavel Butsykin
2015-10-16 12:35 ` Markus Armbruster
2015-10-16 12:33 ` [Qemu-devel] What's the intended use of log.h logging? (was: [PATCH 2/3] log: report hmp/qmp command and qmp event) Markus Armbruster
2015-10-16 12:48 ` [Qemu-devel] What's the intended use of log.h logging? Paolo Bonzini
2015-10-16 12:54 ` Peter Maydell
2015-10-16 13:00 ` Paolo Bonzini
2015-10-16 13:38 ` Denis V. Lunev
2015-10-16 13:26 ` Daniel P. Berrange
2015-10-16 13:29 ` Peter Maydell
2015-10-16 13:30 ` Paolo Bonzini
2015-10-16 13:36 ` Peter Maydell
2015-10-16 14:17 ` Paolo Bonzini
2015-10-16 14:31 ` Peter Maydell
2015-10-16 15:27 ` Paolo Bonzini [this message]
2015-10-19 13:17 ` Markus Armbruster
2015-10-19 13:19 ` Paolo Bonzini
2015-10-19 13:54 ` Peter Maydell
2015-10-16 12:51 ` [Qemu-devel] What's the intended use of log.h logging? (was: [PATCH 2/3] log: report hmp/qmp command and qmp event) Peter Maydell
2015-10-19 14:29 ` [Qemu-devel] What's the intended use of log.h logging? Markus Armbruster
2015-10-19 14:41 ` Peter Maydell
2015-10-19 16:57 ` Dr. David Alan Gilbert
2015-10-19 17:02 ` Dr. David Alan Gilbert
2015-10-20 13:11 ` Kevin Wolf
2015-10-16 14:36 ` [Qemu-devel] What's the intended use of log.h logging? (was: [PATCH 2/3] log: report hmp/qmp command and qmp event) Alex Bennée
2015-10-19 14:52 ` [Qemu-devel] What's the intended use of log.h logging? Markus Armbruster
2015-10-19 14:57 ` Peter Maydell
2015-10-21 10:41 ` [Qemu-devel] What's the intended use of log.h logging? (was: [PATCH 2/3] log: report hmp/qmp command and qmp event) Stefan Hajnoczi
2015-10-21 11:10 ` [Qemu-devel] What's the intended use of log.h logging? Denis V. Lunev
2015-10-21 12:22 ` [Qemu-devel] What's the intended use of log.h logging? (was: [PATCH 2/3] log: report hmp/qmp command and qmp event) Peter Maydell
2015-10-22 12:26 ` Stefan Hajnoczi
2015-10-22 13:05 ` [Qemu-devel] What's the intended use of log.h logging? Paolo Bonzini
2015-10-15 7:30 ` [Qemu-devel] [PATCH 3/3] log: adds a timestamp to each log entry Denis V. Lunev
2015-10-16 7:49 ` Markus Armbruster
2015-10-16 9:55 ` Pavel Butsykin
2015-10-16 11:33 ` Markus Armbruster
2015-10-15 14:49 ` [Qemu-devel] [PATCH 0/3] QEMU logging improvements Kashyap Chamarthy
2015-10-15 15:18 ` Pavel Butsykin
2015-10-15 16:02 ` Kashyap Chamarthy
2015-10-26 9:16 ` Markus Armbruster
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