Messages in this thread | | | From | Baolin Wang <> | Date | Mon, 9 Sep 2019 20:16:43 +0800 | Subject | Re: [PATCH 2/4] mmc: Add virtual command queue support |
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Hi Adrian,
On Mon, 9 Sep 2019 at 20:02, Adrian Hunter <adrian.hunter@intel.com> wrote: > > On 6/09/19 6:52 AM, Baolin Wang wrote: > > Now the MMC read/write stack will always wait for previous request is > > completed by mmc_blk_rw_wait(), before sending a new request to hardware, > > or queue a work to complete request, that will bring context switching > > overhead, especially for high I/O per second rates, to affect the IO > > performance. > > > > Thus this patch introduces virtual command queue interface, which is > > similar with the hardware command queue engine's idea, that can remove > > the context switching. > > CQHCI is a hardware interface for eMMC's that support command queuing. What > you are doing is a software issue queue, unrelated to CQHCI. I think you
Yes.
> should avoid all reference to CQHCI i.e. call it something else.
Since its process is similar with CQHCI and re-use the CQHCI's interfaces, I called it virtual command queue. I am not sure what else name is better, any thoughts? VCQHCI? Thanks.
-- Baolin Wang Best Regards
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