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Re: [Qemu-ppc] [PATCH v3 6/8] xics-kvm: Support for in-kernel XICS inter
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From: |
Alexander Graf |
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Subject: |
Re: [Qemu-ppc] [PATCH v3 6/8] xics-kvm: Support for in-kernel XICS interrupt controller |
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Date: |
Tue, 27 Aug 2013 11:28:20 +0200 |
On 19.08.2013, at 07:55, 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.
>
> Signed-off-by: David Gibson <address@hidden>
> [Mike Qiu <address@hidden>: fixed mistype which caused ics_set_kvm_state() to
> fail]
> Signed-off-by: Alexey Kardashevskiy <address@hidden>
Reviewed-by: Alexander Graf <address@hidden>
Very nice!
Alex
- Re: [Qemu-ppc] [PATCH v3 2/8] xics: add pre_save/post_load/cpu_setup dispatchers, (continued)
- [Qemu-ppc] [PATCH v3 5/8] xics: split to xics and xics-common, Alexey Kardashevskiy, 2013/08/19
- [Qemu-ppc] [PATCH v3 6/8] xics-kvm: Support for in-kernel XICS interrupt controller, Alexey Kardashevskiy, 2013/08/19
- Re: [Qemu-ppc] [Qemu-devel] [PATCH v3 0/8] xics: reworks and in-kernel support, Andreas Färber, 2013/08/23
- [Qemu-ppc] [PATCH v3] xics: Add H_IPOLL implementation, Alexey Kardashevskiy, 2013/08/23
- [Qemu-ppc] [PATCH v3] xics: Implement H_XIRR_X, Alexey Kardashevskiy, 2013/08/23