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Following up on a question I posed earlier:
I ended up with a User CPU time and Total CPU time that was about 4% longer in duration than the elapsed real time. Based on the accepted answer to my earlier question, I don't understand how this could be the...
Started by Jeff on
, 4 posts
by 4 people.
Answer Snippets (Read the full thread at stackoverflow):
Were one of those CPUs disabled values (time, ticks....
Because if I use two CPUs at 100% for 10 minutes, I've used 20 minutes worth of CPU time (i.e.
Multithreaded code on multiple cores can use more than 100% CPU time.
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We are running computing jobs with GridEngine. Every jobs returns 3 different times:
Wall clock time User time CPU time What are the differences between these three? Which of these three is most suitable to compare the performance of two applications/...
Started by Peter Smit on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at serverfault):
This does not count anything else that might be running, and also does not count CPU time spent in the kernel (such as for file....
User time measures the amount of time the CPU spent running your code.
At the time.
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I'm using a built-in benchmarking module for some quick and dirty tests. It gives me:
CPU time system CPU time (actually I never get any result for this with the code I'm running) the sum of the user and system CPU times (always the same as the CPU time...
Started by Jeff on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
It may....
The three seconds is what you.
The CPU for one more second running your code, you would have seen:
ten seconds elapsed time, two seconds user time, one second system time, three seconds total CPU time.
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Will the comparison of two float numbers consume more CPU time than two ints?
Started by lovespring on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at stackoverflow):
First of all, it may be removed by the compiler if it's known to be irrelevant, it may be rewritten by... .
With today's CPUs (excluding maybe embedded machines and the Atom) you can't really make predictions on how fast a single inctruction in code may be .
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How can I programatically find the CPU time which is displayed in System Idle Process (in Task Manager) using Visual C++?
Started by subbu on
, 6 posts
by 6 people.
Answer Snippets (Read the full thread at stackoverflow):
The result will be the CPU time your::endl; }
This....
If you request that time twice, the amount of ticks in the elapsed time period can be converted to seconds through the constant CLOCKS_PER_SEC.
Spent cpu time.
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For some of the customers that we develop software for, we are required to "guarantee" a certain amount of spare resources (memory, disk space, CPU). Memory and disk space are simple, but CPU is a bit more difficult.
One technique that we have used is...
Started by Steve Hawkins on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
Of spare CPU time..
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I'm taking care of a windows servers in my company. AFAIK, the server is a member of active directory. I notice from task manager that the process LSASS.exe is taking a lot of memory and cpu time. Via google, I've found it could possibly be fixed with...
Started by Sake on
, 3 posts
by 3 people.
Answer Snippets (Read the full thread at serverfault):
If the process is....
Thusly, on a domain controller computer, you will see more CPU, RAM, and IO resources Security Policy.
Each time you try to access any resource, a bit of code deep down in LSASS actually says database.
Operating system.
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I have an objective-c application for OS X that compares two sqlite DB's and produces a diff in json format. The db are quite large (10,000 items with many fields). Sometimes this applications runs in about 55 sec(using 95% of the cpu). Sometimes it takes...
Started by Joe Cannatti on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
Usually you....
You can use some in the long run.
There is a lot of stuff running in the background that doesn't use a lot of CPU time but does send out a lot? The CPU isn't throttling itself - it's definitely waiting for something.
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How does a C program determine, at RUN time (not compile time), whether it's running on Little-Endian or Big-Endian CPU?
The reason why it must be "run-time" check, not "complie-time", is because I'm building the program in MAC OSX's Universal Binary ...
Started by Andrew Jefferson on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
This is compile time, but the source for fat binaries gets compiled seperatly for each architecture.
Architecture? I imagine that when you talk about compile time, you're referring to using your configure.
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My hosting provider (pairNetworks) has certain rules for scripts run on the server. I'm trying to compress a file for backup purposes, and would ideally like to use bzip2 to take advantage of its AWESOME compression rate. However, when trying to compress...
Started by Matt on
, 5 posts
by 5 people.
Answer Snippets (Read the full thread at stackoverflow):
I love seeing the CPU....
I always niced.
Nice won't help you - the amount of CPU seconds will still be the same, no matter how many actual that takes 30 CPU seconds will always take 30 CPU seconds even if it's preempted for hours.
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