by Senth » Sat, 23 Mar 2002 12:48:13
Thanks ..
by Martien Verbrugge » Sat, 23 Mar 2002 13:39:27
$ man psQuote:> I have a application running in Solairs 8 server with 12 cpus. The
> application was coded to use 4 cpus. When I use "top" to monitor the
> process, it always shows one cpu. Is there a command which can tell,
> which cpus the program is using. I wanted to make sure the program
> utilizes 4 cpus, instead of one.
Look at the -L option. it'll show you how many threads your process is
running.
Martien
--
|
Martien Verbruggen | That's not a lie, it's a terminological
Trading Post Australia | inexactitude.
|
by Marvi » Sat, 23 Mar 2002 14:40:49
man pbindQuote:> I have a application running in Solairs 8 server with 12 cpus. The
> application was coded to use 4 cpus. When I use "top" to monitor the
> process, it always shows one cpu. Is there a command which can tell,
> which cpus the program is using. I wanted to make sure the program
> utilizes 4 cpus, instead of one.
> Thanks ..
by Joe Blogg » Sat, 23 Mar 2002 17:18:14
"mpstat 1 30" might help to show the overall load across all your CPUs.Quote:> I have a application running in Solairs 8 server with 12 cpus. The
> application was coded to use 4 cpus. When I use "top" to monitor the
> process, it always shows one cpu. Is there a command which can tell,
> which cpus the program is using. I wanted to make sure the program
> utilizes 4 cpus, instead of one.
> Thanks ..
by Juergen Kei » Sat, 23 Mar 2002 22:47:51
by Senth » Sun, 24 Mar 2002 02:38:15
When I used mpstat 1 30, it says the process is using only one cpu all
the time. The same tool when ran on another sun server, its using all
the 4 cpus. Will the system restricts usage of multiple cpus? If so,
is there any system parameter, which can be set, so that the
application process can use multiple cpus.
Thanks again.
by Senth » Sun, 24 Mar 2002 02:39:29
> > Thanks ..
> "mpstat 1 30" might help to show the overall load across all your CPUs.
When I used mpstat 1 30, it says the process is using only one cpu all
the time. The same tool when ran on another sun server, its using all
the 4 cpus. Will the system restricts usage of multiple cpus? If so,
is there any system parameter, which can be set, so that the
application process can use multiple cpus.
Thanks again
by Tony Walt » Thu, 28 Mar 2002 23:42:33
> When I used mpstat 1 30, it says the process is using only one cpu all
> the time. The same tool when ran on another sun server, its using all
> the 4 cpus. Will the system restricts usage of multiple cpus?
There is no such system parameter. Unless something else[1] isQuote:> If so,
> is there any system parameter, which can be set, so that the
> application process can use multiple cpus.
[1]"Something else"s include
The application is single threaded (so will only ever run on one CPU
at a time)
The application is written to produce only a maximum number of threads
Someone has bound the process to one CPU using pbind
Someone has defined processor sets using psrset and your application
is not allowed to run on a given processor set.
The latter two are not the default - by default the OS will attempt to
schedule as many threads arew created on as many CPUs as are online.
--
Tony
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