On 12/5/13 11:10 , Daniil Lunev wrote: > Hello. > Measuring and investigating perfomance in Illumos I have faced the problem > that I can't find a mechanism to get a thread's CPU time in the code. Two > things I've found are not applicable: the dtraces' fields in kthread_t are > filled when the dtrace's vtime is enabled only, another is tk_cpu_time and > tk_cpu_ticks in task_t but this way has a bad resolution and updates on > clockticks only. Have I missed anything? If it's all we have, may be it's a > good idea to add some mechanisms for monitoring thread CPU usage inside the > kernel? For example, I have an idea to add a flag to the kthread structure > which makes the kernel to use the dtrace's switch procedures or something > similar if it's enabled. Does it make any sense? Will it be so bad for the > context switching time?
Did you look at the thread microstates at all? eg. run prstart -mLc -p <pid> 1 Robert ------------------------------------------- illumos-discuss Archives: https://www.listbox.com/member/archive/182180/=now RSS Feed: https://www.listbox.com/member/archive/rss/182180/21175430-2e6923be Modify Your Subscription: https://www.listbox.com/member/?member_id=21175430&id_secret=21175430-6a77cda4 Powered by Listbox: http://www.listbox.com
