htop On Fri, 07 Mar 2008 10:25:59 +1300 Kerry Mayes <[EMAIL PROTECTED]> wrote:
> Do you know of a command line program to watch the processor load on > multiple cores? (I've been using "top" but it just gives a single > figure. The other alternatives I've seen only give a point in time.) > > The machine I want to watch is a server and doesn't have a gui > installed. It has twin dual core processors and is running a windows > vm under vmware that is set to use two processors. I'd like to see > whether it is using two of the notional processors or is just mimicing > two processors. > > Cheers > Kerry > > > On 06/03/2008, John Carter <[EMAIL PROTECTED]> wrote: > > Now, if you have a dual core (like me) or higher processor... watch > > what happens to your CPU load with something like gkrellm. > > > > Only one core is doing all the work. > > > > > > The man page says... > > --max-procs=max-procs, -P max-procs > > Run up to max-procs processes at a time; the default is 1. > > If max-procs is 0, xargs will run > > as many processes as possible at a time. > > > > Well, lets make things happen twice as fast.... > > > > find ~/oldmail -type f | xargs -P 2 zgrep -i 'some keyphrase' > > > > Whoops... That didn't work. Still only keeping one core busy. > > > > Lets see what happen... > > > > find ~/oldmail -type f | xargs -P 2 echo ---------MARKER----------- > > zgrep -i 'some keyphrase' > > > > ---------MARKER----------- zgrep -i 'some keyphrase' file.1 file.2 file.3 > > ....... > > > > Aha! xargs packed _all_ the files onto the command line of one zgrep > > instance, it didn't need to invoke a second. > > > > In fact, if only I had finished reading the man page... > > Use the -n option with -P; otherwise chances are that only one exec > > will be done. > > I would have known that! > > > > Let's try that again... > > > > find ~/oldmail -type f | xargs -P 2 -n 1 zgrep -i 'some keyphrase' > > > > Hmm. That's creating hundreds of setups and tear downs for zgrep. How > > about... > > > > find ~/oldmail -type f | xargs -P 2 -n 5 zgrep -i 'some keyphrase' > > > > Yip. Good balance. Both cores busy full time on useful work. > > > > > > > > John Carter Phone : (64)(3) 358 6639 > > Tait Electronics Fax : (64)(3) 359 4632 > > PO Box 1645 Christchurch Email : [EMAIL PROTECTED] > > New Zealand > > > >
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