Intel® C++ Compiler
Community support and assistance for creating C++ code that runs on platforms based on Intel® processors.
7956 Discussions

ferquents peaks in CPU utilization with C/C++ compiler

mayank_kumarin
Beginner
‎07-01-2004 08:35 AM
280 Views
Hi all
i am facing the following problem. I compiled my application whhich performs some complex dsp calculations
using the flags /O3 and /QxNP. The applications
avergae behavior has improved in terms of CPU utilization
by as much as 40 % but the peak behavior has still not improved . In fact i am getting the same peak cpu utilization as earlier but these peak cpu utilizations occur very frequently. Can anybody explain this.


thanks
Mayank

Message Edited by mayank_kumarin on 07-01-2004 01:37 AM

0 Kudos

Link Copied

1 Reply
Peng_T_
Beginner
‎07-01-2004 01:43 PM
280 Views
Hi,
One explanation is the most compute intensive part of your program has not been changed, so the peak stays the same. The rest have better performance with the optimizations causing average utilization up.
Peng.
0 Kudos
Copy link
Reply

Community support is provided during standard business hours (Monday to Friday 7AM - 5PM PST). Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.