Basically I have a program that does a lot of I/O and alloctes/frees a lot
of memory. The time command gives result like this:
6.239u 19.329s 7:59.76 5.3% 310+775k 3993+246io 7pf+0w
I want to know why CPU is running only 5.3% of the total time. I just
want know how long it is waiting for
* Zhihui Zhang [EMAIL PROTECTED] [020515 10:33] wrote:
Basically I have a program that does a lot of I/O and alloctes/frees a lot
of memory. The time command gives result like this:
6.239u 19.329s 7:59.76 5.3% 310+775k 3993+246io 7pf+0w
I want to know why CPU is running only 5.3% of
What if most I/O are asynchronous writes and handled by a background
process (e.g. SoftUpdate syncer daemon or a special kernel daemon), then I
guess the wait should have something to do with memory or buffer. But I do
not know to to confirm this. Maybe some profiling or instrumentation (too
Zhihui Zhang wrote:
Basically I have a program that does a lot of I/O and alloctes/frees a lot
of memory. The time command gives result like this:
6.239u 19.329s 7:59.76 5.3% 310+775k 3993+246io 7pf+0w
I want to know why CPU is running only 5.3% of the total time. I just
want know
Zhihui Zhang wrote:
What if most I/O are asynchronous writes and handled by a background
process (e.g. SoftUpdate syncer daemon or a special kernel daemon), then I
guess the wait should have something to do with memory or buffer. But I do
not know to to confirm this. Maybe some profiling or
On Mon, 13 May 2002, Zhihui Zhang wrote:
A process can sleep for various reasons such as memory, I/O etc. Is there
a way to collect statistics about how long it sleeps for different
reasons? Thanks.
I don't think it's actually accounted for anywhere, but if a process does
go to sleep the
Doug White wrote:
On Mon, 13 May 2002, Zhihui Zhang wrote:
A process can sleep for various reasons such as memory, I/O etc. Is there
a way to collect statistics about how long it sleeps for different
reasons? Thanks.
I don't think it's actually accounted for anywhere, but if a process
A process can sleep for various reasons such as memory, I/O etc. Is there
a way to collect statistics about how long it sleeps for different
reasons? Thanks.
-Zhihui
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