On 8/31/2017 2:09 PM, Adrian Hunter wrote:
On 30/08/17 16:04, Ritesh Harjani wrote:
Hi All,
Please ignore the previous patch series from a wrong email
address. Stupid gitconfig issue. Apologies for the spam.
This is RFC patch series based on top of ulfh_mmc/cmdq branch
which is based upon Adrian's CMDQ patch series.
Below patch series enables CQE for sdhci-msm platform.
This has been tested on internal 8996 MTP which has CMDQ support.
Fixes w.r.t. CMDQ:-
There are some patches identified which were required atleast on
MSM platform. I am not sure if these are required for any other
CQE platform or not. Patchset 1, 3 & 4 commit text describes
the problems.
Performance related:-
I gave one small shot for performance and the numbers were not looking good.
So, unless I have tested for performance completely, I should not discuss
on performance numbers as of now with this patchset.
I can try doing some more performance testing and post the results -
though this may take some while.
You might also need custom Send Status Configuration.
Yes, I will check that once.
I think for the single job I/O this may not would have matter much.
But sure, I will check on this, if re-configuring is needed.
I used below test script for random read/write test.
*randwrite-test-script*
[global]
bs=32k
size=1g
rw=randwrite
direct=1
directory=/data/fiotest
Random write results can vary a lot. It is important to know if the eMMC
has lots of un-mapped blocks or not. e.g. for ext4 is the "-o discard"
option being used. I find I get more consistent results if I always have
discards enabled.
[file1]
filename=singlefile1
*randread-test-script*
[global]
bs=32k
size=1g
rw=randread
directory=/data/fiotest
If you don't set numjobs > 1 then there is little benefit of the queue.
Also still need direct=1
Yes, silly me. But still I got lower results with single job then.
But anyways let me again check this out. Thanks.
[file1]
filename=singlefile1
@Adrian,
Thanks a lot for pursuing and bringing CMDQ patch series to it's final stages :)
Ritesh Harjani (4):
mmc: cqhci: Move CQHCI_ENABLE before setting TDLBA/TDLBAU
mmc: sdhci-msm: Add CQHCI support for sdhci-msm
mmc: sdhci-msm: Change the desc_sz on cqe_enable/disable.
mmc: sdhci-msm: Handle unexpected interrupt case on enabling legacy
IRQs on CQE halt
.../devicetree/bindings/mmc/sdhci-msm.txt | 1 +
drivers/mmc/host/Kconfig | 1 +
drivers/mmc/host/cqhci.c | 7 +-
drivers/mmc/host/sdhci-msm.c | 121 ++++++++++++++++++++-
4 files changed, 125 insertions(+), 5 deletions(-)
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