Messages in this thread | | | From | Norbert van Nobelen <> | Subject | Re: 50% CPU user usage but top doesn't list any CPU unfriendly task | Date | Tue, 4 Jan 2005 08:51:23 +0100 |
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The load and the CPU useage are two separate things: Load: Defined by a programmer on an estimate on which his program is running 100% fulltime, thus consuming little or more CPU/IO. The interesting program you mention is the VoIP application. Is this program multithreaded and is every thread using a little bit of CPU? Than it quickly adds up to the mentioned 40%. The load is than also easily reached.
On Monday 03 January 2005 22:46, jerome lacoste wrote: > Hi, > > on a fairly old box used as a desktop (PII 300 Mhz with 196M RAM), I > observe the following strange behavior which I believe comes from the > kernel. > > There's a VoIP known 'P2P' closed source application running, an IP > tables based firewall and a remote ssh session initiated. When using > top, sorting by CPU usage, no program is using more than a couple of > percent of CPU. On the other side, the total CPU user time is at > around 40%, with a 1.5 load average. Memory looks OK. The machine is > responsive as usual. > > So I wonder why the cpu user time is at 40% without any particular > program showing as using CPU in the top listing. 'Problem' was > reproducible with 2.4.x and now with 2.6.8.1. > > So it this a real problem or is there something that I don't > understand in particular? Thanks for the insight. > > Jerome > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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