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Re: multi cpus

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On 02/28/2015 11:11 AM, Robert Heller wrote:
> At Sat, 28 Feb 2015 18:31:27 +0000 (UTC) William Unruh <unruh@invalid.ca> wrote:
>
>>
>> On 2015-02-28, john@wexfordpress.com <john@wexfordpress.com> wrote:
>>> My computer seems to bog down on certain apps like scribus, swriter etc. Yet when
>>> I check "top" the app in question is using 100% of the cpu. In fact I have three cpus. Is it possible that only one is being used? If so, how do I fix this?
>>> Slackware 14.1.
>>
>> Most programs can use only one cpu. They are not designed for parallel
>> operation. So, unless you rewrite the programs, or persuade the writer
>> to write them in a parallel processor form, ( a gift of $10000 would
>> probably help in that) there is nothing you can do.
>
> Many programs would not benefit from multi-threading. Any GUI program that is
> not doing anything computationly intensive would get little or no benefit from
> multi-threading. Multi-threading is most useful for server daemons (handling
> multiple connection requests concurrently) and computationly intensive
> programs (running computation in parallel). Certain other programs where
> multiple concurrent activities are possible or advantagious (like a web
> browser [eg FF] downloading multiple files for a web site -- eg html in one
> thread, css in another, javascript in another, images in yet another, etc.).
>
> Most of the time having multiple CPUs in a *desktop* machine helps when you
> are actually running multiple programs OR have background daemons also running
> (eg your desktop machine is also acting as a server). This includes running
> virtual machines on your desktop.
>
>>
>>>
>>> John Culleton

	Not all programs but some such as fwbackups will run 2 of my 4 
processors at 100% or close to it and 2 with lower percentages of
utilization.  That is 4 processors in an AMD A10.  Running KSysGuard
to get a visual representation which may have added to the work load.

	Next time I run fwbackups I will use top or htop so that I
can post the output here.

	bliss

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multi cpus "john@wexfordpress.com" <john@wexfordpress.com> - 2015-02-28 06:01 -0800
  Re: multi cpus Pascal Hambourg <boite-a-spam@plouf.fr.eu.org> - 2015-02-28 15:15 +0100
    Re: multi cpus Robert Heller <heller@deepsoft.com> - 2015-02-28 08:52 -0600
    Re: multi cpus Baho Utot <baho-utot@columbus.rr.com> - 2015-02-28 15:51 -0500
  Re: multi cpus Tim Watts <tw_usenet@dionic.net> - 2015-02-28 14:51 +0000
  Re: multi cpus William Unruh <unruh@invalid.ca> - 2015-02-28 18:31 +0000
    Re: multi cpus Robert Heller <heller@deepsoft.com> - 2015-02-28 13:11 -0600
      Re: multi cpus Bobbie Sellers <bliss-sf4ever@dslextreme.com> - 2015-02-28 13:35 -0800
    Re: multi cpus Andreas Kohlbach <feb15.5.ankman@spamgourmet.net> - 2015-02-28 16:31 -0500
    Re: multi cpus Jean-David Beyer <jeandavid8@verizon.net> - 2015-03-05 21:11 -0500
  Re: multi cpus faeychild <faeychild@nomail.afraid.org> - 2015-03-01 12:32 +1100

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