Messages in this thread | | | Date | Mon, 10 Oct 2011 22:31:34 +0800 | Subject | [Question] PM-QoS: PM_QOS_CPU_DMA_LATENCY == interrupt latency? | From | Ming Lei <> |
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Hi,
Looks like it is a bit difficult to understand PM_QOS_CPU_DMA_LATENCY from the words' meaning.
After searching from google, I don't find some useful information about the root cause for introducing PM_QOS_CPU_DMA_LATENCY. I understand it is very similar to interrupt latency. Also from the comment for omap_pm_set_max_mpu_wakeup_lat in file[1], the description is basically same with interrupt latency.
From comments of pm_qos_add_request usages in drivers, it can be understood as interrupt latency too, IMO.
So, could we think that PM_QOS_CPU_DMA_LATENCY is interrupt latency?
[1], arch/arm/plat-omap/include/plat/omap-pm.h
thanks, -- Ming Lei
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