Re: Kernel tracing options with USB subsystem

2012-07-23 Thread Kernel Newbie
Hello Greg, On Fri, Jul 20, 2012 at 11:30 PM, Greg KH wrote: > > A: No. > Q: Should I include quotations after my reply? > > http://daringfireball.net/2007/07/on_top > > On Fri, Jul 20, 2012 at 10:14:57PM +0530, Balakumar wrote: >> Hi Greg, >> >> When it comes to embedded device cases, I feel tha

Re: Kernel tracing options with USB subsystem

2012-07-20 Thread Greg KH
A: No. Q: Should I include quotations after my reply? http://daringfireball.net/2007/07/on_top On Fri, Jul 20, 2012 at 10:14:57PM +0530, Balakumar wrote: > Hi Greg, > > When it comes to embedded device cases, I feel that the options are > just left with debug messages. It becomes really difficu

Re: Kernel tracing options with USB subsystem

2012-07-20 Thread Balakumar
Hi Greg, When it comes to embedded device cases, I feel that the options are just left with debug messages. It becomes really difficult to debug some SMP specific issues, thread deadlocks etc. I felt that, using trace events, we could effectively log some of those specific data without the pen

Re: Kernel tracing options with USB subsystem

2012-07-19 Thread Greg KH
On Thu, Jul 19, 2012 at 10:00:12PM +0530, Balakumar wrote: > Hello Alan, John, > > I had this question from the embedded perspective. printk on > occasions seems to have some overhead which actually dilutes the > issue occurrence frequency. So, just wanted to know if this was not > included by cho

Re: Kernel tracing options with USB subsystem

2012-07-19 Thread Balakumar
Hello Alan, John, I had this question from the embedded perspective. printk on occasions seems to have some overhead which actually dilutes the issue occurrence frequency. So, just wanted to know if this was not included by choice. Many Thanks, ~Bala On 07/19/2012 12:12 AM, Alan Stern wrote:

Re: Kernel tracing options with USB subsystem

2012-07-18 Thread Alan Stern
On Wed, 18 Jul 2012, Balakumar wrote: > Hello All, > > I see that there are no tracing options (e.g. traceevents) defined in > the USB subsystem. Like, they have been defined for scsi, scheduler, > workqueues etc (include/trace/events/*). I am fairly new to Linux and I > am trying to study the

Re: Kernel tracing options with USB subsystem

2012-07-18 Thread Maxin B John
Hi Bala, On Wed, Jul 18, 2012 at 7:45 PM, Balakumar wrote: > Hello All, > > I see that there are no tracing options (e.g. traceevents) defined in the > USB subsystem. Like, they have been defined for scsi, scheduler, workqueues > etc (include/trace/events/*). I am fairly new to Linux and I am try