From: Claudio Fontana <cfontana@suse.de>
To: "Paolo Bonzini" <pbonzini@redhat.com>,
"Thomas Huth" <thuth@redhat.com>,
"Laurent Vivier" <lvivier@redhat.com>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Peter Maydell" <peter.maydell@linaro.org>,
"Philippe Mathieu-Daudé" <philmd@redhat.com>,
"Roman Bolshakov" <r.bolshakov@yadro.com>,
"Markus Armbruster" <armbru@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>,
Colin Xu <colin.xu@intel.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
qemu-devel@nongnu.org, haxm-team@intel.com,
Wenchao Wang <wenchao.wang@intel.com>,
Sunil Muthuswamy <sunilmut@microsoft.com>,
Richard Henderson <rth@twiddle.net>
Subject: Re: [PATCH 3/3] cpu-timers, icount: new modules
Date: Sat, 11 Jul 2020 11:14:26 +0200 [thread overview]
Message-ID: <e3cc11a4-8ba7-917a-844b-4f6ec69d140a@suse.de> (raw)
In-Reply-To: <146b0cf2-509b-6a48-e82b-b93740e4c60d@redhat.com>
On 7/11/20 12:45 AM, Paolo Bonzini wrote:
> On 10/07/20 06:36, Thomas Huth wrote:
>>
>> In short this goes away if I again set icount to enabled for qtest,
>> basically ensuring that --enable-tcg is there and then reenabling icount.
>>
>> qtest was forcing icount and shift=0 by creating qemu options, in order to misuse its counter feature,
>> instead of using a separate counter.
>
> Why would it need a separate counter? In both cases it's a
> manually-updated counter that is used for QEMU_CLOCK_VIRTUAL. The only
> difference is that shift > 0 doesn't make sense for qtest.
>
> Paolo
>
I think I would reverse the question. Why reuse for qtest a counter that has absolutely nothing to do with it?
qtest has nothing to do with instruction counting.
Keeping the relationship between qtest and the icount module means that
functionality of icount cannot be carved out into a separate module that is only included with tcg.
Ciao,
CLaudio
next prev parent reply other threads:[~2020-07-11 9:15 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-29 9:35 [PATCH 0/3] QEMU cpus.c refactoring part1 Claudio Fontana
2020-06-29 9:35 ` [PATCH 1/3] softmmu: move softmmu only files from root Claudio Fontana
2020-07-03 17:21 ` Paolo Bonzini
2020-06-29 9:35 ` [PATCH 2/3] cpu-throttle: new module, extracted from cpus.c Claudio Fontana
2020-06-29 9:35 ` [PATCH 3/3] cpu-timers, icount: new modules Claudio Fontana
2020-07-08 14:34 ` Paolo Bonzini
2020-07-08 15:00 ` Claudio Fontana
2020-07-08 15:05 ` Paolo Bonzini
2020-07-08 15:07 ` Thomas Huth
2020-07-08 15:12 ` Paolo Bonzini
2020-07-08 15:15 ` Claudio Fontana
2020-07-08 15:15 ` Thomas Huth
2020-07-08 15:17 ` Claudio Fontana
2020-07-08 15:23 ` Paolo Bonzini
2020-07-08 15:30 ` Claudio Fontana
2020-07-09 18:38 ` Claudio Fontana
2020-07-09 18:46 ` Claudio Fontana
2020-07-10 6:33 ` Cornelia Huck
2020-07-10 19:20 ` Claudio Fontana
2020-07-13 10:46 ` Cornelia Huck
2020-07-11 11:40 ` Claudio Fontana
2020-07-13 10:51 ` Cornelia Huck
2020-07-13 11:27 ` Claudio Fontana
2020-07-10 4:36 ` Thomas Huth
2020-07-10 22:45 ` Paolo Bonzini
2020-07-11 9:14 ` Claudio Fontana [this message]
2020-07-11 9:39 ` Paolo Bonzini
2020-07-11 11:49 ` Claudio Fontana
2020-07-11 12:19 ` Paolo Bonzini
2020-07-11 12:48 ` Claudio Fontana
2020-07-29 8:48 ` Claudio Fontana
2020-07-29 10:01 ` Paolo Bonzini
2020-07-30 16:33 ` Claudio Fontana
2020-07-30 22:09 ` Paolo Bonzini
2020-07-31 10:59 ` Claudio Fontana
2020-07-02 6:27 ` [PATCH 0/3] QEMU cpus.c refactoring part1 Claudio Fontana
2020-07-03 17:21 ` Paolo Bonzini
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