Bob, Is it possible to disable C-States and Turbo Mode in the BIOS and any dynamic power/cpu freq. scaling in the system?
I believe you are hitting a profiling effect on the 1 sec boundaries but would like to rule out the other possibilities as well. -- Carlos On Wed, Feb 13, 2013 at 9:27 AM, Bob Friesenhahn < [email protected]> wrote: > On Wed, 13 Feb 2013, Jim Klimov wrote: > >> >> These suggest that there are (were?) issues with power management, at >> least on some platforms, and in particular that in their cases the >> kernel time started at 0% but could grow over time to some 20%. >> >> You might look into whether this is relevant to your case, if you can >> disable the cpupm completely and if that helps... >> > > You may be on to something here. In fact, now I notice something odd in > the 'timeline' plot in the Studio Performance Analyzer tool. > > The system CPU is jumping, and exactly on one second boundaries. I am not > sure if the jump is a function of the analyzer tool (which samples at close > to 1KHz) or what is really happening. > > Timeline > ======== > > Seconds User CPU System CPU > > 0-1 95.64 4.36% > 1-2 82.21 17.79% > 2-9 58.81 41% > 9- 75.20 24.8% > > I don't know if it will get through, but I have attached a screen capture > of the analyzer timeline. > > This program should be totally CPU and memory bound so it really does not > make sense for there to be much system time at all. > > Here is my current content from /etc/power.conf: > > device-dependency-property removable-media /dev/fb > autopm disable > autoS3 default > cpu-threshold 1s > S3-support enable > # Auto-Shutdown Idle(min) Start/Finish(hh:mm) Behavior > autoshutdown 30 9:00 9:00 noshutdown > cpupm enable > > % prtdiag > System Configuration: Supermicro X9DAi > BIOS Configuration: American Megatrends Inc. 1.00 02/03/2012 > > ==== Processor Sockets ==============================**====== > > Version Location Tag > ------------------------------**-- -------------------------- > Intel(R) Xeon(R) CPU E5-2680 0 @ 2.70GHz SOCKET 0 > Intel(R) Xeon(R) CPU E5-2680 0 @ 2.70GHz SOCKET 1 > > % psrinfo -vp > The physical processor has 8 cores and 16 virtual processors (0-7 16-23) > The core has 2 virtual processors (0 16) > The core has 2 virtual processors (1 17) > The core has 2 virtual processors (2 18) > The core has 2 virtual processors (3 19) > The core has 2 virtual processors (4 20) > The core has 2 virtual processors (5 21) > The core has 2 virtual processors (6 22) > The core has 2 virtual processors (7 23) > x86 (GenuineIntel 206D7 family 6 model 45 step 7 clock 2700 MHz) > Intel(r) Xeon(r) CPU E5-2680 0 @ 2.70GHz > The physical processor has 8 cores and 16 virtual processors (8-15 24-31) > The core has 2 virtual processors (8 24) > The core has 2 virtual processors (9 25) > The core has 2 virtual processors (10 26) > The core has 2 virtual processors (11 27) > The core has 2 virtual processors (12 28) > The core has 2 virtual processors (13 29) > The core has 2 virtual processors (14 30) > The core has 2 virtual processors (15 31) > x86 (GenuineIntel 206D7 family 6 model 45 step 7 clock 2700 MHz) > Intel(r) Xeon(r) CPU E5-2680 0 @ 2.70GHz > > > Bob > -- > Bob Friesenhahn > [email protected], http://www.simplesystems.org/** > users/bfriesen/ <http://www.simplesystems.org/users/bfriesen/> > GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ > > > ------------------------------**------------- > illumos-discuss > Archives: > https://www.listbox.com/**member/archive/182180/=now<https://www.listbox.com/member/archive/182180/=now> > RSS Feed: https://www.listbox.com/**member/archive/rss/182180/** > 21830666-0797d1b5<https://www.listbox.com/member/archive/rss/182180/21830666-0797d1b5> > Modify Your Subscription: https://www.listbox.com/** > member/?&id_**secret=21830666-1de30d6d<https://www.listbox.com/member/?&;> > Powered by Listbox: http://www.listbox.com > ------------------------------------------- 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
