On Wed, Mar 19, 2014 at 11:05 PM, vichy wrote:
> hi Ming:
One approach I like to use is trace event.
>>> Would you please let us how to to use trace event for calculate
>>> max/average usb irq time?
>>
>> You can enable irq_handler_entry and irq_handler_exit event, then
>> write a script easi
hi Ming:
>>> One approach I like to use is trace event.
>> Would you please let us how to to use trace event for calculate
>> max/average usb irq time?
>
> You can enable irq_handler_entry and irq_handler_exit event, then
> write a script easily to figure out the time consumed in ehci irq handler,
On Wed, 19 Mar 2014, Ming Lei wrote:
> But actually the local interrupt is still disabled during completion
> because we need to convert spin_lock in all current usb drivers
> to spin_lock_irqsave() first.
>
> I posted lot of patches to do the conversion, but unfortunately
> most of them aren't m
On Wed, Mar 19, 2014 at 9:34 PM, vichy wrote:
> hi Ming
>>>
>>> in http://permalink.gmane.org/gmane.linux.usb.general/89363
>>>
>>> I have some questions about this patch.
>>> 1. is there patch or kernel config I can use to measure man/avage usb
>>> irq time consuming like the above link show
>>
>
hi Ming
>>
>> in http://permalink.gmane.org/gmane.linux.usb.general/89363
>>
>> I have some questions about this patch.
>> 1. is there patch or kernel config I can use to measure man/avage usb
>> irq time consuming like the above link show
>
> One approach I like to use is trace event.
Would you pl
On Wed, Mar 19, 2014 at 5:57 PM, vichy wrote:
> hi Ming.lei:
> 2014-03-17 22:01 GMT+08:00 Alan Stern :
>> On Sun, 16 Mar 2014, vichy wrote:
>>
>>> hi all:
>>> recently we bump to system performance issue when usb irq take quite long.
>>> I found below link for discussing how to short
>>>
>
> in h
hi all:
2014-03-19 17:57 GMT+08:00 vichy :
> hi Ming.lei:
> 2014-03-17 22:01 GMT+08:00 Alan Stern :
>> On Sun, 16 Mar 2014, vichy wrote:
>>
>>> hi all:
>>> recently we bump to system performance issue when usb irq take quite long.
>>> I found below link for discussing how to short
>>>
>
> in http
hi Ming.lei:
2014-03-17 22:01 GMT+08:00 Alan Stern :
> On Sun, 16 Mar 2014, vichy wrote:
>
>> hi all:
>> recently we bump to system performance issue when usb irq take quite long.
>> I found below link for discussing how to short
>>
in http://permalink.gmane.org/gmane.linux.usb.general/89363
I h
On Sun, 16 Mar 2014, vichy wrote:
> hi all:
> recently we bump to system performance issue when usb irq take quite long.
> I found below link for discussing how to short
>
> http://permalink.gmane.org/gmane.linux.usb.general/89363
>
> I have some questions about this patch.
Instead of just post
hi all:
recently we bump to system performance issue when usb irq take quite long.
I found below link for discussing how to short
http://permalink.gmane.org/gmane.linux.usb.general/89363
I have some questions about this patch.
1. is there patch or kernel config I can use to measure man/avage usb
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