On Wed, 9 Jul 2014 18:40:46 +0530 Bob Biloxi <iambobbiloxi@xxxxxxxxx> wrote: > Hi, > > I was going through the mr.c file as part of understanding WRITE_MTT > command in the mlx4 code. > > I could see that instead of issuing the WRITE_MTT HCR command, in case > of SRIOV, we're directly accessing the ICM space for the MTT Table, > taking the ownership and updating it. We're doing this using > dma_sync_single_for_cpu and dma_sync_single_for_cpu. > > I was curious as to why this approach was chosen instead of using the > HCR command. > > Can anyone please explain the reason/motivation behind this approach? > Performance. Direct write to memory is much faster than via HCR -Jack > > > Thanks so much, > > > Best Regards, > Marc > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" > in the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
