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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

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Old 05-30-2003, 03:26 PM   #1
plisken
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Registered: Dec 2001
Location: Scotland
Distribution: Slackware 9.1-15 RH 6.2/7, RHEL 6.5 SuSE 8.2/11.1, Debian 10.5
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quad processors


Hi there, I have been running RH6.2 on a sparc 20 which was installed with two CPU's on board, I have however since installed 4 CPU's.

How can I find out if these additional 2 CPU's are being used by the OS?

The reason, I'm asking, is that I did not really see any improvement in performace, only really an increase in heat

The initial installation comrised of 2x75MHz and when changing to 2x125MHz, I did notice some increase in speed for general things like loading images etc. But after adding the final 2 processors, I didn't really notice any improvements at all.

Will I need to "recompile the kernel"? something that frightens the life out of me...

Thanks in advance...

Harry
 
Old 05-30-2003, 06:31 PM   #2
ranger_nemo
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Location: N'rn WI -- USA
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Two things to look at...

/proc/cpuinfo ... If it lists the four processors, it's using them.

top ... It will show the percent use / idle of all the processors running.

Adding processors isn't really additive... It won't perform the same as four separate systems. The four processors use the same memory, and it can only take requests from one at a time. So, if all four have to access memory or the hard-drive at the same time, the others have to wait their turn.
 
Old 05-31-2003, 07:50 AM   #3
joel112
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dmesg, look near the top, it should show each processor being initialised
 
Old 05-31-2003, 09:11 AM   #4
plisken
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Distribution: Slackware 9.1-15 RH 6.2/7, RHEL 6.5 SuSE 8.2/11.1, Debian 10.5
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The /proc/cpuinfo file looks like this:

cpu : ROSS HyperSparc RT625 or RT626
fpu : ROSS HyperSparc combined IU/FPU
promlib : Version 3 Revision 2
prom : 2.25
type : sun4m
ncpus probed : 4
ncpus active : 4
Cpu0Bogo : 124.92
Cpu1Bogo : 125.33
Cpu2Bogo : 125.33
Cpu3Bogo : 125.33
MMU type : ROSS HyperSparc
invall : 0
invmm : 0
invrnge : 0
invpg : 0
contexts : 4096
CPU0 : online
CPU1 : online
CPU2 : online
CPU3 : online

I assume that all are operating, ie being recognised by the OS and hopefully being utilised.
If nothing else, it will make for a good heater in the winter time

Cheers...
 
  


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