On Wed, Jul 7, 2021 at 5:57 PM Bruce Richardson <bruce.richard...@intel.com> wrote: > > On Wed, Jul 07, 2021 at 06:46:33AM +0000, Ruifeng Wang wrote: > > > -----Original Message----- > > > From: Thomas Monjalon <tho...@monjalon.net> > > > Sent: Wednesday, July 7, 2021 2:32 PM > > > To: Ruifeng Wang <ruifeng.w...@arm.com> > > > Cc: Jan Viktorin <vikto...@rehivetech.com>; jer...@marvell.com; Bruce > > > Richardson <bruce.richard...@intel.com>; dev@dpdk.org; > > > david.march...@redhat.com; nd <n...@arm.com>; Honnappa Nagarahalli > > > <honnappa.nagaraha...@arm.com> > > > Subject: Re: [PATCH v4 3/3] build: add option to enable wait until equal > > > > > > 07/07/2021 07:48, Ruifeng Wang: > > > > Introduce a meson option 'use_wfe' to select wait until equal method. > > > > The default is disable. Traditional polling loop is used. > > > > When enabled, architecture specific mechanism is relied on to do the > > > > wait. > > > > > > Why do we need an option? > > > Can it be automatic to enable it when supported? > > > > > The problem is inconsistency in performance on different Arm platforms. We > > had decided that each platform needs to enable it after some testing. > > > Can that not be done via variables in the cross-file for the builds, or via > automatic detection if it's a native build? Is it likely that individual > users of DPDK will be knowledgable enough to use this option correctly?
+1 to add this in cross-file instead of the top of config option as scope if is only for arm64 builds.
