[Skiboot] [PATCH] hw/phb3: Increase AIB TX command credit for DMA read in CAPP DMA mode

Andrew Donnellan andrew.donnellan at au1.ibm.com
Wed Jul 13 16:26:35 AEST 2016


On 08/07/16 16:46, Andrew Donnellan wrote:
>> Any reason why you are only increasing command credits for DMA read on
>> channel 2 and not for DMA writes on Channel 0 ?
>
> As far as I'm aware we were only observing significant performance
> degradation on reads, not writes. John/Rick/Mike - thoughts?

John's confirmed privately that he wasn't observing any performance 
issues on the writes but will check this. I'll see if we can figure out 
what value it's originally set to...

-- 
Andrew Donnellan              OzLabs, ADL Canberra
andrew.donnellan at au1.ibm.com  IBM Australia Limited



More information about the Skiboot mailing list