RE: [Xen-devel][Pv-ops][PATCH 3/3 v3] Netback: Use Kernel thread to replace the tasklet.

["Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx>]

Dulloor wrote:
> On Mon, May 3, 2010 at 6:52 PM, Xu, Dongxiao <dongxiao.xu@xxxxxxxxx>
> wrote: 
>> Netback: Use Kernel thread to replace the tasklet.
>> 
>> Kernel thread has more control over QoS, and could improve dom0's
>> userspace responseness. This option is defaultly off currently.
> 
> Why not use just kthreads ?

Actually according to our previous testing, kthreads will cost more cpu
cycle than tasklet under certain workload, due to the frequent context
switch. But kthread could achieve more control over QoS. Therefore we
offer this option.

> 
> Also, the multiple checks for MODPARM_kthread could be avoided using
> an inline function : schedule_netback_thread

Thanks for the suggestion.

Best Regards,
-- Dongxiao

> 
>> 
>> Signed-off-by: Dongxiao Xu <dongxiao.xu@xxxxxxxxx>
>> _______________________________________________
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>> http://lists.xensource.com/xen-devel
>> 
>> 
> 
> -dulloor


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