[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [PATCH] pseries: Support for in-kernel XICS interrupt c
From: |
Alexey Kardashevskiy |
Subject: |
Re: [Qemu-devel] [PATCH] pseries: Support for in-kernel XICS interrupt controller |
Date: |
Thu, 06 Jun 2013 18:19:31 +1000 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130514 Thunderbird/17.0.6 |
On 06/06/2013 05:41 PM, David Gibson wrote:
> On Wed, Jun 05, 2013 at 05:39:58PM +1000, Alexey Kardashevskiy wrote:
>> From: David Gibson <address@hidden>
>>
>> Recent (host) kernels support emulating the PAPR defined "XICS" interrupt
>> controller system within KVM. This patch allows qemu to initialize and
>> configure the in-kernel XICS, and keep its state in sync with qemu's XICS
>> state as necessary.
>>
>> This should give considerable performance improvements. e.g. on a simple
>> IPI ping-pong test between hardware threads, using qemu XICS gives us
>> around 5,000 irqs/second, whereas the in-kernel XICS gives us around
>> 70,000 irqs/s on the same hardware configuration.
>>
>> [Mike Qiu <address@hidden>: fixed mistype which caused ics_set_kvm_state()
>> to fail]
>> Signed-off-by: David Gibson <address@hidden>
>> Signed-off-by: Alexey Kardashevskiy <address@hidden>
>
> I think this one also needs the headers update for qemu first, yes?
Yes, my bad, I sent headers patch + one patch which Scott Wood already posted.
--
Alexey