Re: [PATCH] usb: dwc3: gadget: Fix ISO transfer performance

From	Felipe Balbi <balbi@kernel.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH] usb: dwc3: gadget: Fix ISO transfer performance
Date	2017-05-17 09:50 +0200
Message-ID	<tI1Sy-ck-19@gated-at.bofh.it> (permalink)
References	<tyGki-5UE-5@gated-at.bofh.it> <tI1Sy-ck-21@gated-at.bofh.it>
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Hi,

Roger Quadros <rogerq@ti.com> writes:
> On 21/04/17 15:58, Roger Quadros wrote:
>> Commit 08a36b543803 ("usb: dwc3: gadget: simplify __dwc3_gadget_ep_queue()")
>> caused a small change in the way ISO transfer is handled in the case
>> when XferInProgress event happens on Isoc EP with an active transfer.
>> This caused a performance degradation of 50%. e.g. using g_webcam on DUT
>> and luvcview on host the video frame rate dropped from 16fps to 8fps
>> @high-speed.
>> 
>> Make the ISO transfer handling equivalent to that prior to that commit
>> to get back the original ISO performance numbers.
>> 
>> Fixes: 08a36b543803 ("usb: dwc3: gadget: simplify __dwc3_gadget_ep_queue()")
>> Signed-off-by: Roger Quadros <rogerq@ti.com>
>
> Any comments?

pull request coming shortly ;-)

-- 
balbi

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Re: [PATCH] usb: dwc3: gadget: Fix ISO transfer performance Felipe Balbi <balbi@kernel.org> - 2017-05-17 09:50 +0200

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