Re: [PATCH] dmaengine: xgene-dma: Disable memcpy operation due to performance drop

2015-10-08 Thread Rameshwar Sahu
On Thu, Oct 8, 2015 at 2:23 PM, Arnd Bergmann wrote: > On Thursday 08 October 2015 13:55:16 Rameshwar Prasad Sahu wrote: >> The DMA engine supports memory copy, RAID5 XOR, RAID6 PQ, and other >> computations. But the bandwidth of the entire DMA engine is shared >> among all channels. This patch re

Re: [PATCH] dmaengine: xgene-dma: Disable memcpy operation due to performance drop

2015-10-08 Thread Arnd Bergmann
On Thursday 08 October 2015 13:55:16 Rameshwar Prasad Sahu wrote: > The DMA engine supports memory copy, RAID5 XOR, RAID6 PQ, and other > computations. But the bandwidth of the entire DMA engine is shared > among all channels. This patch re-configures operations availability > such that one can ach

[PATCH] dmaengine: xgene-dma: Disable memcpy operation due to performance drop

2015-10-08 Thread Rameshwar Prasad Sahu
The DMA engine supports memory copy, RAID5 XOR, RAID6 PQ, and other computations. But the bandwidth of the entire DMA engine is shared among all channels. This patch re-configures operations availability such that one can achieve maximum performance for XOR and PQ computation by removing the memory