[gentoo-user] how do i know my SMP is working and setup right?

[gentoo-user] how do i know my SMP is working and setup right?

[Daevid Vincent]

I just upgraded my Gentoo server from an old Celeron 1Ghz to a Pentium4
3Ghz (hyperthreaded).
 
In /etc/make.conf I have:

CHOST="i686-pc-linux-gnu"
CFLAGS="-O2 -march=pentium4 -pipe -fomit-frame-pointer -mfpmath=sse
-mmmx -msse"
MAKEOPTS="-j3"

I compiled the new kernel and added some SMP stuff I saw:

daevid ~ # uname -a
Linux daevid.com 2.6.19-gentoo-r5 #2 SMP PREEMPT Sat May 26 13:50:25 PDT
2007 i686 Intel(R) Pentium(R) 4 CPU 3.00GHz GenuineIntel GNU/Linux

But when I'm in KDE, the little load applet doesn't show two CPUs
(should it?).

So how can I tell that it's being used, and what "tool" will show me
both CPUs and their loads n stuff (like WinXP does in taskmgr -- this
used to be an XP box BTW. I "upgraded" it ;-)

daevid ~ # x86info
x86info v1.20.  Dave Jones 2001-2006
Feedback to <davej@redhat.com>.
 
Found 2 CPUs
------------------------------------------------------------------------
--
CPU #1
Family: 15 Model: 3 Stepping: 4 Type: 0 Brand: 0
CPU Model: Pentium 4 (Prescott) [D0] Original OEM
Processor name string: Intel(R) Pentium(R) 4 CPU 3.00GHz
 
Feature flags:
 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36
clflsh ds acpi mmx fxsr sse sse2 ss ht tm pbe sse3 monitor ds-cpl
cntx-id xTPR
Extended feature flags:
 
Cache info
 Instruction trace cache: 12K uOps, 8-way associative.
 L1 Data cache: 16KB, sectored, 8-way associative. 64 byte line size.
 L2 unified cache: 1MB, sectored, 8-way associative. 64 byte line size.
TLB info
 Instruction TLB: 4K, 2MB or 4MB pages, fully associative, 64 entries.
 Data TLB: 4KB or 4MB pages, fully associative, 64 entries.
The physical package supports 2 logical processors 
 
------------------------------------------------------------------------
--
CPU #2
Family: 15 Model: 3 Stepping: 4 Type: 0 Brand: 0
CPU Model: Pentium 4 (Prescott) [D0] Original OEM
Processor name string: Intel(R) Pentium(R) 4 CPU 3.00GHz
 
Feature flags:
 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36
clflsh ds acpi mmx fxsr sse sse2 ss ht tm pbe sse3 monitor ds-cpl
cntx-id xTPR
Extended feature flags:
 
Cache info
 Instruction trace cache: 12K uOps, 8-way associative.
 L1 Data cache: 16KB, sectored, 8-way associative. 64 byte line size.
 L2 unified cache: 1MB, sectored, 8-way associative. 64 byte line size.
TLB info
 Instruction TLB: 4K, 2MB or 4MB pages, fully associative, 64 entries.
 Data TLB: 4KB or 4MB pages, fully associative, 64 entries.
The physical package supports 2 logical processors 
 
------------------------------------------------------------------------
--

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Re: [gentoo-user] how do i know my SMP is working and setup right?

[Denis]

Having done this several times now, you have to select the following
in the kernel:

-SMP support and SMP Scheduling (only for processors with Hyperthreading)
-Enhanced Real Time Clock (RTC) support
-ACPI (in the power management menu)

Without ACPI support, only one processor will be recognized, as I
recently had experienced.

There may be something else I'm forgetting, but right now the list
seems complete.  Hope this helps.
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RE: [gentoo-user] how do i know my SMP is working and setup right?

[Daevid Vincent]

> -----Original Message-----
> From: Denis [mailto:denis.che@gmail.com] 
> Sent: Saturday, May 26, 2007 3:47 PM
> To: gentoo-user@lists.gentoo.org
> Subject: Re: [gentoo-user] how do i know my SMP is working 
> and setup right?
> 
> Having done this several times now, you have to select the following
> in the kernel:
> 
> -SMP support and SMP Scheduling (only for processors with 
> Hyperthreading)
> -Enhanced Real Time Clock (RTC) support
> -ACPI (in the power management menu)
> 
> Without ACPI support, only one processor will be recognized, as I
> recently had experienced.
> 
> There may be something else I'm forgetting, but right now the list
> seems complete.  Hope this helps.

I checked my .config and it seems I have those set (and running in
current kernel).

So why doesn't KDE show it in the little CPU applet?

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Re: [gentoo-user] how do i know my SMP is working and setup right?

[darren kirby]

quoth the Daevid Vincent:

> So why doesn't KDE show it in the little CPU applet?

What does:
cat /proc/cpuinfo

tell you?

-d
-- 
darren kirby :: Part of the problem since 1976 :: http://badcomputer.org
"...the number of UNIX installations has grown to 10, with more expected..."
- Dennis Ritchie and Ken Thompson, June 1972
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Re: [gentoo-user] how do i know my SMP is working and setup right?

[Iain Buchanan]

On Sat, 2007-05-26 at 15:19 -0700, Daevid Vincent wrote:
> I just upgraded my Gentoo server from an old Celeron 1Ghz to a Pentium4
> 3Ghz (hyperthreaded).

[snip]

> But when I'm in KDE, the little load applet doesn't show two CPUs
> (should it?).

don't know about kde, but have you tried something simple like top?
load it and then press '1' to swap between a "composite" cpu and "real"
cpus.

HTH,
-- 
Iain Buchanan <iaindb at netspace dot net dot au>

In matters of principle, stand like a rock;
in matters of taste, swim with the current.
		-- Thomas Jefferson

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