Re: [LAT] Hyper Threading

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From: Robin Gareus <robin@...>

To: Jaromír Mikeš <mira.mikes@...>

Cc: <linux-audio-tuning@...>

Subject: Re: [LAT] Hyper Threading

Date: Thursday, September 18, 2008 - 2:53 pm

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Jaromír Mikeš wrote:

quoted text

> Hi,
>
> While configuring new kernel should I check "yes" for SMP ?

Disable it if you don't have a dual core and compile for your machine only.

However there may be a few kernel features like HPET or SMT that depend
on SMP, `make menuconfig` will tell you about it.

> (Symmetric multi-processing support )

quoted text

> I have Pentium 4 with "Hyper threading"

that's CONFIG_SCHED_SMT :

SMT scheduler support improves the CPU scheduler's decision making
when dealing with Intel Pentium 4 chips with HyperThreading at a
cost of slightly increased overhead in some places. If unsure say
N here.

HTH,
robin
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Messages in current thread:

[LAT] Hello, Gilberto Borges, (Wed Jul 30, 9:39 pm)

[LAT] Hyper Threading, Jaromír Mikeš, (Wed Sep 17, 10:43 pm)

[LAT] amd64: kernels? base system?, james of jwm-art net, (Tue Dec 2, 5:53 pm)

Re: [LAT] [LAU] Are RT-patches needed anymore? (Was Re: >..., Fernando Lopez-Lezcano, (Mon Feb 2, 11:08 pm)

Re: [LAT] 2.6.29-rt1, Robin Gareus, (Sat Mar 28, 1:18 pm)

[LAT] RT kernel for audio and dynamic vs static ticks, Lars-Erik Helander, (Mon Jan 18, 12:50 pm)

[LAT] scheduled server downtime - 10/Jan/12 - linuxaudio.org, Robin Gareus, (Tue Jan 10, 3:26 pm)

Re: [LAT] 2.6.29-rt1, Fernando Lopez-Lezcano, (Sat Mar 28, 6:11 pm)

Re: [LAT] 2.6.29-rt1, Ray Rashif, (Wed Apr 8, 2:54 am)

Re: [LAT] [LAU] Are RT-patches needed anymore? (Was Re: >..., dieeasy, (Tue Feb 3, 3:04 pm)

Re: [LAT] [LAU] Are RT-patches needed anymore? (Was Re: >..., Fernando Lopez-Lezcano, (Tue Feb 3, 6:11 pm)

Re: [LAT] [LAU] Are RT-patches needed anymore? (Was Re: >..., dieeasy, (Wed Feb 4, 8:42 am)

Re: [LAT] amd64: kernels? base system?, Daniel James, (Wed Dec 3, 11:17 am)

Re: [LAT] amd64: kernels? base system?, james of jwm-art net, (Wed Dec 3, 3:29 pm)

Re: [LAT] Hyper Threading, Robin Gareus, (Thu Sep 18, 2:53 pm)

Re: [LAT] Hyper Threading, Jaromír Mikeš, (Thu Sep 18, 7:45 pm)

Re: [LAT] Hello, Andy Farnell, (Wed Jul 30, 10:00 pm)

Re: [LAT] Hello, Marcos Guglielmetti, (Wed Jul 30, 11:00 pm)

Re: [LAT] Hello, Daniel James, (Tue Aug 5, 3:12 pm)

Re: [LAT] Hello / kernels, Marcos Guglielmetti, (Wed Aug 6, 8:53 am)

Re: [LAT] Hello / kernels, Robin Gareus, (Thu Aug 7, 5:05 pm)

Re: [LAT] Hello / kernels, Marcos Guglielmetti, (Wed Aug 6, 3:36 pm)