Re: test jiffies on ARM SMP board

2013-02-24 Thread bill4carson
On 2013年02月21日 01:30, Russell King - ARM Linux wrote: On Wed, Feb 20, 2013 at 10:54:41PM +0530, anish kumar wrote: On Thu, 2013-02-21 at 00:39 +0800, buyitian wrote: i am confused about my test. in one device driver, i put below code: printk("start to test test jiffies\n"); local_

Re: test jiffies on ARM SMP board

2013-02-20 Thread Mandeep Sandhu
On Wed, Feb 20, 2013 at 10:54 PM, anish kumar wrote: > On Thu, 2013-02-21 at 00:39 +0800, buyitian wrote: >> i am confused about my test. in one device driver, >> i put below code: >> >> printk("start to test test jiffies\n"); >> >> local_irq_save(flags); >> >> jf1 = jiffies; // read j

Re: test jiffies on ARM SMP board

2013-02-20 Thread anish kumar
On Wed, 2013-02-20 at 17:30 +, Russell King - ARM Linux wrote: > On Wed, Feb 20, 2013 at 10:54:41PM +0530, anish kumar wrote: > > On Thu, 2013-02-21 at 00:39 +0800, buyitian wrote: > > > i am confused about my test. in one device driver, > > > i put below code: > > > > > > printk("start t

Re: test jiffies on ARM SMP board

2013-02-20 Thread Russell King - ARM Linux
On Wed, Feb 20, 2013 at 10:54:41PM +0530, anish kumar wrote: > On Thu, 2013-02-21 at 00:39 +0800, buyitian wrote: > > i am confused about my test. in one device driver, > > i put below code: > > > > printk("start to test test jiffies\n"); > > > > local_irq_save(flags); > > > > jf1 =

Re: test jiffies on ARM SMP board

2013-02-20 Thread anish kumar
On Thu, 2013-02-21 at 00:39 +0800, buyitian wrote: > i am confused about my test. in one device driver, > i put below code: > > printk("start to test test jiffies\n"); > > local_irq_save(flags); > > jf1 = jiffies; // read jiffies first time > > // hold cpu for about 2 seconds(d