[bf1942] OT: /proc, top, ps broken in some linux kernels?
luca.fabbro at procne.it
Thu Jun 3 08:54:23 EDT 2004
If you find something it will be very apreciated.
I'm going to upgrade kernels to 2.6 this summer, not to close to the server
farm, and I hope that at that time procs will show up correctly.
At 14.41 03/06/2004, you wrote:
>Thanks for that Luca good to see we're not the only one. I've been talking
>to the coder of top / ps and there may well be a kernel patch out there
>to fix this but it will mean more load in general is it will add cycles
>to each context switch. If I find it I will report it.
> Steve / K
>----- Original Message -----
>From: "Luca Fabbro" <luca.fabbro at procne.it>
>To: <bf1942 at icculus.org>
>Sent: 03 June 2004 13:22
>Subject: Re: [bf1942] OT: /proc, top, ps broken in some linux kernels?
> > I have the same problem running kernel 2.4.20 of a Slackware distro.
> > I've tried several machines XP1700+, XP1800+, XP2000+, XP2500+ and XP2800+
> > and also some PIII and P4. I noticed the same stange thing, some
> servers as
> > for example MOHAA, COD, BF1942, BFV, HLDS won't show the real CPU usage
> > while the machine has a low CPU load, other servers as Q3, SOF2, ET, JKO
> > and JKA seem to show the real CPU usage.
> > A lot of server as you said show a 0% of cpu usage (also in proc) but they
> > are really using more than 0 (of course). I've noticed that if the load of
> > the machine reaches a certain value things stats to show up as they really
> > are. I was running a server of COD of 18 players on an XP1700+, the cpu
> > usually 0% but of course it wasn't the truth. I've also turned on on that
> > machine a Q3 server and had the following. When the q3 server was full the
> > cpu usage of the COD server was the one supposed to be that was for full
> > 18/18 60% of cpu. 60% of COD plus around 25% of Q3 wich means 85% of load
> > of the machine. It seems that for a strange mechanism the kernel is not
> > able to identify the real CPU usage of certyain processes till the CPU is
> > heavilly loaded :(
> > BF1942 and BFVietnam for example will show a very low cpu usage untill
> > start to be crowded, let's say at least 14 players, at this point I'll
> > notice a probable CPU usage starting from 20-25% depending on the machine.
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