On Wed, Mar 19, 2014 at 11:05 PM, vichy vichy@gmail.com 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
hi Ming.lei:
2014-03-17 22:01 GMT+08:00 Alan Stern st...@rowland.harvard.edu:
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
hi all:
2014-03-19 17:57 GMT+08:00 vichy vichy@gmail.com:
hi Ming.lei:
2014-03-17 22:01 GMT+08:00 Alan Stern st...@rowland.harvard.edu:
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
On Wed, Mar 19, 2014 at 5:57 PM, vichy vichy@gmail.com wrote:
hi Ming.lei:
2014-03-17 22:01 GMT+08:00 Alan Stern st...@rowland.harvard.edu:
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
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 please let us
On Wed, Mar 19, 2014 at 9:34 PM, vichy vichy@gmail.com 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
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
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,
see
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 posting
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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