Very Computer

by **Mohun Biswa** » Sat, 16 Oct 2004 13:19:24

> The following is an excerpt from the 'top' output:
> ---------
> PID USERNAME THR PRI NICE SIZE RES STATE TIME CPU COMMAND
> 19828 tstUsr 25 47 4 899M 58M sleep 4:11 14.34%
> bin.execRun
> ---------

> The above state is after Thread.Sleep()(Java code) is invoked. I am
> just wondering, how the thread which is in 'sleep' state consumes so
> much i.e.14.34% of CPU.

> Could anybody clarify this?

Can't help directly, but 'top' is deprecated on Solaris nowadays in
favor of the built-in 'prstat' program which provides largely the same
output. Try that and see if it's perhaps a problem with top itself
rather than your system.

--
M.Biswas

by **Fredrik Lundho** » Sat, 16 Oct 2004 18:36:18

>The following is an excerpt from the 'top' output:
>---------
> PID USERNAME THR PRI NICE SIZE RES STATE TIME CPU COMMAND
>19828 tstUsr 25 47 4 899M 58M sleep 4:11 14.34%
>bin.execRun
>---------

>The above state is after Thread.Sleep()(Java code) is invoked. I am
>just wondering, how the thread which is in 'sleep' state consumes so
>much i.e.14.34% of CPU.

>Could anybody clarify this?

The CPU usager percent is not an instant snapshot rather an average over some
time back. Wait some more and watch the value lower over time.

/Fredrik

--
Fredrik Lundholm

by **Paul Lutu** » Sat, 16 Oct 2004 12:33:47

> The following is an excerpt from the 'top' output:
> ---------
> PID USERNAME THR PRI NICE SIZE RES STATE TIME CPU COMMAND
> 19828 tstUsr 25 47 4 899M 58M sleep 4:11 14.34%
> bin.execRun
> ---------

> The above state is after Thread.Sleep()(Java code) is invoked. I am
> just wondering, how the thread which is in 'sleep' state consumes so
> much i.e.14.34% of CPU.

> Could anybody clarify this?

Something is wrong with your program or your system. You have not posted any
code or revealed your OS, so all one can do is conjecture in obvious ways.

I just created a dummy program that calls Thread.sleep(15000) and watched my
"top" output on Fedora Core 2, no CPU-hogging activity here.

Maybe you could provide some information?

--
Paul Lutus
http://www.arachnoid.com

by **Darren Dunha** » Sat, 16 Oct 2004 23:50:52

Quote:> The following is an excerpt from the 'top' output:
> ---------
> PID USERNAME THR PRI NICE SIZE RES STATE TIME CPU COMMAND
> 19828 tstUsr 25 47 4 899M 58M sleep 4:11 14.34%
> bin.execRun
> ---------
> The above state is after Thread.Sleep()(Java code) is invoked. I am
> just wondering, how the thread which is in 'sleep' state consumes so
> much i.e.14.34% of CPU.

The state is a snapshot at one point in time. The thread may have been
sleeping for a moment, but in general is running.

Also, the CPU time there is identical to the one in 'ps'. It represents
what is basically a weighted average of CPU consuption over the previous
few seconds (not quite, but pretty close).

So the process could consume CPU for 30 seconds, then sleep for
something like 40 to 50 seconds and you'd get a sleeping process that
has a CPU figure of 14% or so.

--

Senior Technical Consultant TAOS http://www.taos.com/
Got some Dr Pepper? San Francisco, CA bay area
< This line left intentionally blank to confuse you. >

Very Computer

'top' output -> High CPU consumption when thread is in 'sleep' state

'top' output -> High CPU consumption when thread is in 'sleep' state

'top' output -> High CPU consumption when thread is in 'sleep' state

'top' output -> High CPU consumption when thread is in 'sleep' state

'top' output -> High CPU consumption when thread is in 'sleep' state