Re: MMC Driver Throughput

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Hello Bruce,
On 1/30/2013 8:35 PM, Bruce Ford (bford) wrote:
Question:

Has any testing been done to determine the maximum data throughput to/from
a MMC device; assuming the MMC device takes zero time to complete tasks?

Put another way - at what level of IOPS does the kernel/driver become the
bottleneck, instead of the storage device?
This should depend on specific host controller, hardware and driver.
You can look from another end:

kernel/driver overhead = "Row max TPT of of the MMC device" - "lmdd/iozone/tiotest max TPT"

Where the row tpt can be found from card vendor data.

--
Konstantin Dorfman,
QUALCOMM ISRAEL, on behalf of Qualcomm Innovation Center,
Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation

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