[dpdk-dev] [PATCH] raw/ioat: fix termination descriptor for batch

Bruce Richardson bruce.richardson at intel.com
Fri Jul 16 16:27:44 CEST 2021


On Fri, Jul 16, 2021 at 02:50:27PM +0100, Konstantin Ananyev wrote:
> When batch_size == 1, idxd has to add a dummy termination descriptor
> to satisfy HW requirements.
> Right now it uses NOP descriptor with FENCE flag.
> This is excessive and fencing can slowdown things quite significantly.
> The patch removes FENCE flag from termination dummy descriptor.
> That helps to improve performance for no-burst scenarios.
> 
> Fixes: 245efe544d8e ("raw/ioat: report status of completed jobs")
> 
> Signed-off-by: Konstantin Ananyev <konstantin.ananyev at intel.com>

Thanks for patch.
Acked-by: Bruce Richardson <bruce.richardson at intel.com>


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