On 02/18/2010 09:40 AM, Avi Kivity wrote:
Now you made me check how fast the real hw is. I get about 65,000,000
fmul operations per second on it.
That's surprisingly low.
I get 3.7 Gflops on my home machine (1G loops, 4 fmul and 4 fadds, all
independent, in 2.15 seconds; otherwise I can't
On 09.02.2010, at 13:27, Avi Kivity wrote:
On 02/09/2010 01:13 PM, Alexander Graf wrote:
Avi Kivity wrote:
On 02/09/2010 01:00 PM, Alexander Graf wrote:
That's pretty impressive (never saw x86 with this exit rate) but it's
more than 1000 times slower than the hardware,
On 02/17/2010 04:56 PM, Alexander Graf wrote:
So I changed to code according to your input by making all FPU calls explicit,
getting rid of all binary patching.
On the PowerStation again I'm running this code (simplified to the important
instructions) using kvmctl:
li r2,
On 17.02.2010, at 17:34, Avi Kivity wrote:
On 02/17/2010 06:23 PM, Alexander Graf wrote:
On 17.02.2010, at 17:03, Avi Kivity wrote:
On 02/17/2010 04:56 PM, Alexander Graf wrote:
So I changed to code according to your input by making all FPU calls
explicit, getting rid of all
On 02/17/2010 08:07 PM, Alexander Graf wrote:
On 17.02.2010, at 17:34, Avi Kivity wrote:
On 02/17/2010 06:23 PM, Alexander Graf wrote:
On 17.02.2010, at 17:03, Avi Kivity wrote:
On 02/17/2010 04:56 PM, Alexander Graf wrote:
So I changed to code according to
Avi Kivity wrote:
On 02/08/2010 12:02 AM, Alexander Graf wrote:
It's not a good idea for the kernel either, if it happens all the
time. If a typical Gekko application uses the fpu and the emulated
instructions intensively, performance will suck badly (as in: qemu/tcg
will be faster).
On 02/09/2010 01:00 PM, Alexander Graf wrote:
That's pretty impressive (never saw x86 with this exit rate) but it's
more than 1000 times slower than the hardware, assuming 1 fpu IPC (and
the processor can probably do more). An fpu intensive application
will slow to a crawl.
Measuring a
Avi Kivity wrote:
On 02/09/2010 01:00 PM, Alexander Graf wrote:
That's pretty impressive (never saw x86 with this exit rate) but it's
more than 1000 times slower than the hardware, assuming 1 fpu IPC (and
the processor can probably do more). An fpu intensive application
will slow to a
On 02/09/2010 01:13 PM, Alexander Graf wrote:
Avi Kivity wrote:
On 02/09/2010 01:00 PM, Alexander Graf wrote:
That's pretty impressive (never saw x86 with this exit rate) but it's
more than 1000 times slower than the hardware, assuming 1 fpu IPC (and
the processor can
On 02/08/2010 12:02 AM, Alexander Graf wrote:
It's not a good idea for the kernel either, if it happens all the
time. If a typical Gekko application uses the fpu and the emulated
instructions intensively, performance will suck badly (as in: qemu/tcg
will be faster).
Yeah, I haven't
On 08.02.2010, at 09:53, Avi Kivity wrote:
On 02/08/2010 12:02 AM, Alexander Graf wrote:
It's not a good idea for the kernel either, if it happens all the
time. If a typical Gekko application uses the fpu and the emulated
instructions intensively, performance will suck badly (as in:
On 02/08/2010 01:30 PM, Alexander Graf wrote:
Hum, so you suggest I get some real application running properly first so we
can evaluate if it's fast enough?
Yes, a real application typical for whatever use case you envision for Gekko
emulation (can you shed a few words on that
On 08.02.2010, at 13:03, Avi Kivity wrote:
On 02/08/2010 01:30 PM, Alexander Graf wrote:
Hum, so you suggest I get some real application running properly first so
we can evaluate if it's fast enough?
Yes, a real application typical for whatever use case you envision for
Gekko
On 02/08/2010 02:05 PM, Alexander Graf wrote:
http://www.dolphin-emu.com/
Basically I envision that this is the easiest way to do PR for KVM on PPC.
Releasing this properly will instantly raise awareness and thus potentially
increase our user base by a lot. IMHO it'd also help KVM in
On 08.02.2010, at 13:15, Avi Kivity wrote:
On 02/08/2010 02:05 PM, Alexander Graf wrote:
http://www.dolphin-emu.com/
Basically I envision that this is the easiest way to do PR for KVM on PPC.
Releasing this properly will instantly raise awareness and thus
potentially increase our user
On 02/04/2010 05:55 PM, Alexander Graf wrote:
In an effort to get KVM on PPC more useful for other userspace users than
Qemu, I figured it'd be a nice idea to implement virtualization of the
Gekko CPU.
The Gekko is the CPU used in the GameCube. In a slightly more modern
fashion it lives on in
Am 07.02.2010 um 13:54 schrieb Avi Kivity a...@redhat.com:
On 02/04/2010 05:55 PM, Alexander Graf wrote:
In an effort to get KVM on PPC more useful for other userspace
users than
Qemu, I figured it'd be a nice idea to implement virtualization of
the
Gekko CPU.
The Gekko is the CPU used in
Avi Kivity wrote:
On 02/07/2010 05:49 PM, Alexander Graf wrote:
Am 07.02.2010 um 13:54 schrieb Avi Kivity a...@redhat.com:
On 02/04/2010 05:55 PM, Alexander Graf wrote:
In an effort to get KVM on PPC more useful for other userspace
users than
Qemu, I figured it'd be a nice idea to implement
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