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GenTimJS
Guru
Joined: 03 May 2003
Posts: 406
Location: NH, USA
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 Posted: Thu Oct 27, 2005 2:38 pm Post subject: SB1000 750mhz .. performance gain from SMP ? |
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What I've got:
SunBlade 1000
750mhz USIII
2GB ram
The machine is primarily used as a desktop, running Solaris10 and Gentoo.
I'm considering adding a second CPU (another identical 750mhz) to the system.
From what others have observed on sparc, how is the performance gain from this?
I'm familliar with how SMP does on x86, but never had the chance to play with SMP sparc hardware.
Thoughts?
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gust4voz
Retired Dev
Joined: 09 Sep 2003
Posts: 373
Location: Buenos Aires, Argentina
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| Posted: Fri Oct 28, 2005 12:50 pm Post subject: |
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It mostly boils down to the load you have on the machine.
Building will surely benefit from it for example.
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Gustavo Zacarias
Gentoo/SPARC monkey |
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Evangelion
Veteran
Joined: 31 May 2002
Posts: 1087
Location: Helsinki, Finland
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| Posted: Tue Nov 08, 2005 2:34 pm Post subject: |
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I would guess it's the same, more or less. Better interactivity, better multitasking, better performance on multithreaded apps.
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GenTimJS
Guru
Joined: 03 May 2003
Posts: 406
Location: NH, USA
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| Posted: Tue Nov 08, 2005 2:39 pm Post subject: |
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I'm somewhat torn,
The sb1000 is my primary desktop for my college work (Sorry, I dont trust my schoolwork to x86 or even x64..) and it gets quite a lot of use.
However, even with its bajillion bits of ram, its seeming quite the slug lately.
I've considered "moving up" to an sx1500 based system with a 1.5ghz cpu, or adding a CPU to the b1000
From the sounds of things however, the 2nd CPU would not be much of a boost over what I've got now, since most desktop stuff isnt really built for SMP...
the 2nd cpu in the b1000 is apx $75-$100 US
the lowest ive been quoted at for an sx1500 is close to $2k US.... and I'm not sure I could sell the b1000 at anything close to what I paid for it.
Advice?
Thoughts?
Links to cheap resellers?
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Blood Fluke
Apprentice
Joined: 15 Sep 2005
Posts: 224
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| Posted: Sun Nov 13, 2005 10:12 pm Post subject: |
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I would go ahead and buy the second CPU.
Once you go SMP, you don't ever go back. |
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Evangelion
Veteran
Joined: 31 May 2002
Posts: 1087
Location: Helsinki, Finland
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| Posted: Mon Nov 21, 2005 9:11 am Post subject: |
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| GenTimJS wrote: | I've considered "moving up" to an sx1500 based system with a 1.5ghz cpu, or adding a CPU to the b1000
From the sounds of things however, the 2nd CPU would not be much of a boost over what I've got now, since most desktop stuff isnt really built for SMP...
the 2nd cpu in the b1000 is apx $75-$100 US |
Get the extra CPU. Seriously. Even though individual apps might not benefit from SMP (although many do), the moment you run more than one app, you benefit, since one app can run on one CPU, while the other apps runs of the other CPU. And since you are running several services already, you will benefit automatically, since those services eat (a bit) CPU-power, and with SMP they can be spread between several CPU's.
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nl0pvm
n00b
Joined: 08 Nov 2004
Posts: 46
Location: Netherlands
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| Posted: Mon Nov 21, 2005 10:49 pm Post subject: |
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one stupid question from me:
i've got a sparcstation 10 running smp on a 2.4 kernel and an e250 running smp on a 2.6 kernel for which uname -a looks like this:
| Code: | Linux dory 2.6.11-gentoo-r8 #8 SMP Thu May 19 19:25:04 CEST 2005 sparc64 sun4u TI UltraSparc II (BlackBird) GNU/Linux
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BUT
for some weird reason my sparc does not split up a process on two processors so one process is only capable of consuming 50% of the total cpu power. (what first comes to my mind is: "is it the sparc hardware architecture?")
On my dual xeon server that runs suse 10 (please don't kill me) with also a 2.6 kernel you see that a single process can use both processors full load which results in a better performance that how my sparc uses its smp.
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SUN E250 2 x UltrasparcII@400Mhz 512MB RAM 6 x 9GB Kernel 2.6.8 (SMP)
SUN E250 UltrasparcII@400Mhz 512MB RAM 2 x 9GB Kernel 2.6.11
SUN E250 UltrasparcII@400Mhz 1024MB RAM 2 x 9GB
SPARCstation 10 MP 2 x 390Z55@40Mhz 512MB RAM Kernel 2.4.30 4GB & 9GB |
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Gentoo on Sparc
