On Tue, Jul 16, 2024 at 07:25:41PM -0700, Stephen Hemminger wrote: > On Mon, 15 Jul 2024 15:44:20 +0100 > Jack Bond-Preston <jack.bond-pres...@foss.arm.com> wrote: > > > The mempool memory channel striding optimisation is not necessary on > > Arm platforms. > > Update the Programmer's Guide's mempool section to clarify this. > > > > Signed-off-by: Jack Bond-Preston <jack.bond-pres...@foss.arm.com> > > Reviewed-by: Wathsala Vithanage <wathsala.vithan...@arm.com> > > --- > > The whole memory channels argument has been a problem from day 0 of DPDK. > There is no good way to find it from the OS, and it was never clear how much > impact > it had anyway. It would simplify users experience if it was deprecated or at > least > not required and rarely used.
The default for mempools (at least on x86) is set to 4 which is a reasonable value, and so specifying memory channels is not really required for running DPDK in most cases (I never use the -n flag when running tests myself). While I don't think we should deprecate the option, I feel it should be removed from our examples and scripts. Hopefully in future a method of determining memory channels from code can be come up with that we can use, but in the meantime using a sane default I feel is good enough. /Bruce
