From: Stefan Weil <weil@mail.berlios.de>
To: Mulyadi Santosa <mulyadi.santosa@gmail.com>
Cc: QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [PATCH 0/8] tcg/interpreter: Add TCG + interpreter for bytecode (virtual machine)
Date: Sun, 18 Sep 2011 17:13:54 +0200 [thread overview]
Message-ID: <4E760AB2.50007@mail.berlios.de> (raw)
In-Reply-To: <CAGdaadazsUAY6QoNDx1qmXcPCZBUNGP6gi3OAATgw14BWnbBMg@mail.gmail.com>
Am 18.09.2011 17:02, schrieb Mulyadi Santosa:
> Hi :)
>
> On Sun, Sep 18, 2011 at 02:59, Stefan Weil <weil@mail.berlios.de> wrote:
>> Hello,
>>
>> these patches add a new code generator (TCG target) to qemu.
>
> I personally congrats you for your hard work. So, here's a question
> from who are not so keen with Qemu internals: what is the biggest
> advantage of using TCI instead of directly using TCG?
TCG with native code support is much faster (6x to 10x),
so for emulation on a supported host, TCI has no advantage
for normal users.
Its primary purpose was support of new hosts without a native
TCG.
In addition, it's easier to trace TCG operations in TCI
than in generated native code, so TCI is really good to
examine code, to test new TCG opcodes, to make statistics
(I did some with Valgrind which now now longer works
thanks to coroutines), to test the influence of TCG parameters
like the number of available registers. I'm sure there are
even more interesting applications for which TCI could be
used.
Cheers,
Stefan
next prev parent reply other threads:[~2011-09-18 15:13 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-17 19:59 [Qemu-devel] [PATCH 0/8] tcg/interpreter: Add TCG + interpreter for bytecode (virtual machine) Stefan Weil
2011-09-17 20:00 ` [Qemu-devel] [PATCH 1/8] tcg: Declare TCG_TARGET_REG_BITS in tcg.h Stefan Weil
2011-09-17 20:00 ` [Qemu-devel] [PATCH 2/8] tcg: Don't declare TCG_TARGET_REG_BITS in tcg-target.h Stefan Weil
2011-09-17 20:00 ` [Qemu-devel] [PATCH 3/8] tcg: Add forward declarations for local functions Stefan Weil
2011-09-17 21:40 ` Peter Maydell
2011-09-17 20:00 ` [Qemu-devel] [PATCH 4/8] tcg: Add some assertions Stefan Weil
2011-09-17 20:00 ` [Qemu-devel] [PATCH 5/8] tcg: Add interpreter for bytecode Stefan Weil
2011-09-18 4:03 ` Andi Kleen
2011-09-18 5:49 ` Stefan Weil
2011-09-18 7:22 ` Paolo Bonzini
2011-09-18 17:54 ` Avi Kivity
2011-09-19 6:52 ` Andi Kleen
2011-09-19 11:56 ` Avi Kivity
2011-09-19 14:48 ` Andi Kleen
2011-09-18 10:18 ` Blue Swirl
2011-09-19 16:43 ` Richard Henderson
2011-09-19 20:24 ` Stuart Brady
2011-10-16 21:54 ` Stuart Brady
2011-09-17 20:00 ` [Qemu-devel] [PATCH 6/8] tcg: Add bytecode generator for tcg interpreter Stefan Weil
2011-09-18 10:03 ` Blue Swirl
2011-09-19 22:28 ` Stuart Brady
2011-10-01 16:54 ` Andreas Färber
2011-10-01 21:25 ` Stefan Weil
2011-10-09 16:19 ` Andreas Färber
2011-09-17 20:00 ` [Qemu-devel] [PATCH 7/8] tcg: Add tcg interpreter to configure / make Stefan Weil
2011-09-18 9:37 ` Blue Swirl
2011-09-18 10:14 ` Stefan Weil
2011-09-17 20:00 ` [Qemu-devel] [PATCH 8/8] ppc: Support tcg interpreter on ppc hosts Stefan Weil
2011-09-17 21:31 ` Peter Maydell
2011-09-17 21:33 ` Stefan Weil
2011-09-18 10:26 ` [Qemu-devel] [PATCH 0/8] tcg/interpreter: Add TCG + interpreter for bytecode (virtual machine) Blue Swirl
2011-09-18 10:49 ` malc
2011-09-18 12:12 ` Blue Swirl
2011-09-18 12:46 ` malc
2011-09-18 13:00 ` Blue Swirl
2011-09-18 13:13 ` malc
2011-09-18 13:26 ` Blue Swirl
2011-09-25 20:37 ` Stefan Weil
2011-10-01 12:02 ` Blue Swirl
2011-09-18 15:02 ` Mulyadi Santosa
2011-09-18 15:13 ` Stefan Weil [this message]
2011-09-18 16:39 ` Mulyadi Santosa
2011-09-18 20:15 ` Stefan Weil
2011-09-19 15:14 ` Mulyadi Santosa
2011-09-19 8:40 ` David Gilbert
2011-09-19 10:20 ` Stefan Hajnoczi
2011-09-19 10:27 ` David Gilbert
2011-09-18 18:02 ` Avi Kivity
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