From: "Emilio G. Cota" <cota@braap.org>
To: qemu-devel@nongnu.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
"Peter Crosthwaite" <crosthwaite.peter@gmail.com>,
"Richard Henderson" <rth@twiddle.net>,
"Eduardo Habkost" <ehabkost@redhat.com>,
"Michael S . Tsirkin" <mst@redhat.com>,
"Marcel Apfelbaum" <marcel.apfelbaum@gmail.com>,
"Alex Bennée" <alex.bennee@linaro.org>
Subject: [Qemu-devel] [PATCH 0/4] x86_64 mttcg
Date: Mon, 13 Aug 2018 21:37:57 -0400 [thread overview]
Message-ID: <20180814013801.26036-1-cota@braap.org> (raw)
With this series I can boot a busybox image and several Ubuntu images
with various -smp's.
The speedup we get is in line with what we get with other ISAs, e.g.
-smp 4 takes 34s instead of 1min with thread=single.
I've run this through the Valgrind race detectors, and the remaining
races reported seem benign.
I have not tested i386, so I'm not turning mttcg on for it yet.
Patches 1-2 comply with cpu_get_ticks' documentation. I'm not too
happy about effectively serializing rdtsc, since Linux guests call it
very often (for each vCPU!). But as usual, correctness goes before
performance or scalability.
You can fetch the series from:
https://github.com/cota/qemu/tree/x86_64-mttcg
Thanks,
Emilio
next reply other threads:[~2018-08-14 1:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-14 1:37 Emilio G. Cota [this message]
2018-08-14 1:37 ` [Qemu-devel] [PATCH 1/4] hw/i386/pc: hold the BQL when calling cpu_get_ticks Emilio G. Cota
2018-08-14 6:37 ` Paolo Bonzini
2018-08-14 1:37 ` [Qemu-devel] [PATCH 2/4] cpus: assert that the BQL is held in cpu_get_ticks Emilio G. Cota
2018-08-14 1:38 ` [Qemu-devel] [PATCH 3/4] target/i386/translate: use thread-local storage in !user-mode Emilio G. Cota
2018-08-14 6:31 ` Paolo Bonzini
2018-08-14 7:34 ` Emilio G. Cota
2018-08-14 1:38 ` [Qemu-devel] [PATCH 4/4] configure: enable mttcg for x86_64 Emilio G. Cota
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