OMAP baseline test results for v3.7-rc1
Rafael J. Wysocki
rjw at sisk.pl
Wed Oct 31 05:05:43 EDT 2012
On Wednesday, October 31, 2012 04:34:21 AM Jean Pihet wrote:
> - Added Rafael for the PM QoS discussion -
> On Tue, Oct 30, 2012 at 10:04 AM, Paul Walmsley <paul at pwsan.com> wrote:
> > On Tue, 30 Oct 2012, Paul Walmsley wrote:
> >> Based on a very quick look, I'd say the original patch 3db11fe is broken.
> >> I don't see how it can ensure that its PM_QOS_CPU_DMA_LATENCY request is
> >> honored when CONFIG_CPU_IDLE=n. CONFIG_CPU_IDLE=n is the default for
> >> omap2plus_defconfig.
> > So in fact to follow up on this, looks like one of two changes are needed:
> > 1. Revert 3db11fe
> > or
> > 2. If CONFIG_CPU_IDLE=n, the driver needs to call disable_hlt() in place
> > of the pm_qos constraint add, and call enable_hlt() in place of the pm_qos
> > constraint remove.
> I do not think this is correct. Using disable_hlt is a too radical
> solution and will prevent the idle completely, this is not what we
> Rafael, what do you think?
Well, I agree.
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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