Messages in this thread | | | Date | Fri, 19 May 2017 11:42:45 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH v2 1/2] cpufreq: Make iowait boost a policy option |
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On Thu, May 18, 2017 at 11:23:43PM -0700, Joel Fernandes wrote: > Make iowait boost a cpufreq policy option and enable it for intel_pstate > cpufreq driver. Governors like schedutil can use it to determine if > boosting for tasks that wake up with p->in_iowait set is needed.
Rather than just flat out disabling the option, is there something better we can do on ARM?
The reason for the IO-wait boost is to ensure we feed our external devices data ASAP, this reduces wait times, increases throughput and decreases the duration the devices have to operate.
I realize max freq/volt might not be the best option for you, but is there another spot that would make sense? I can imagine you want to return your MMC to low power state ASAP as well.
So rather than a disable flag, I would really rather see an IO-wait OPP state selector or something.
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