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

Vaibhav Jain vaibhav at linux.vnet.ibm.com
Fri Jul 8 16:40:34 AEST 2016

Hi Andrew,

Andrew Donnellan <andrew.donnellan at au1.ibm.com> writes:

> When enabling CAPI in DMA mode, set the AIB TX command credits for channel
> 2 (DMA read) to 28, rather than 1. This significantly improves DMA read
> performance in CAPI DMA mode.

Any reason why you are only increasing command credits for DMA read on
channel 2 and not for DMA writes on Channel 0 ?

~ Vaibhav

More information about the Skiboot mailing list