>
> In general, for a desktop or server that is doing a lot of different
> things, HT
> is likely to improve performance.
> If the server is dedicated to a single service, there is a distinct chance
> HT
> will lead to decreased performance.
>
> Thanks Joost! That certainly helps.
On Tuesday 10 May 2011 12:28:01 Adam Carter wrote:
> I haven't been able to find clear info on Hyperthreading, but from what I
> can tell it appears that with Hyperthreading On;
> 1. per core performance is slightly reduced
Not in all circumstances...
> 2. you can run two threads per core, but th
I haven't been able to find clear info on Hyperthreading, but from what I
can tell it appears that with Hyperthreading On;
1. per core performance is slightly reduced
2. you can run two threads per core, but there is some contention between
threads
So, generally, if you have less busy threads than
thanks to everyone that helped, ya'll are gods, that got me working with smp/HT
thanks again
Nick
--
gentoo-user@gentoo.org mailing list
On 12/13/05, Glenn Enright <[EMAIL PROTECTED]> wrote:
> On Wednesday 14 December 2005 09:29, Nick Smith wrote:
> > its a server, i dont think i built ACPI into the kernel cause i didnt
> > need/want it, dont think that should make a difference.
>
> From what I can see SMP functoinality seems to rel
Richard Fish wrote:
On 12/13/05, Nick Smith <[EMAIL PROTECTED]> wrote:
its a server, i dont think i built ACPI into the kernel cause i didnt
need/want it, dont think that should make a difference.
I think it does. At least, there is an "acpi=ht" boot option for the
kernel that says to enabl
On Wednesday 14 December 2005 09:29, Nick Smith wrote:
> its a server, i dont think i built ACPI into the kernel cause i didnt
> need/want it, dont think that should make a difference.
>From what I can see SMP functoinality seems to rely quite heavily on ACPI
discovery. Having said that, lots of
On 12/13/05, Nick Smith <[EMAIL PROTECTED]> wrote:
> its a server, i dont think i built ACPI into the kernel cause i didnt
> need/want it, dont think that should make a difference.
I think it does. At least, there is an "acpi=ht" boot option for the
kernel that says to enable just enough of ACPI
> In top what happens when you hit the number '1'?
>
it only lists the one cpu.
>
> Seems a bit strange to me.
>
> - Mark
>
its a server, i dont think i built ACPI into the kernel cause i didnt
need/want it, dont think that should make a difference.
> --
> gentoo-user@gentoo.org mailing list
>
>
On 12/13/05, Nick Smith <[EMAIL PROTECTED]> wrote:
> On 12/13/05, Jeff Williams <[EMAIL PROTECTED]> wrote:
> > Are you viewing /proc/cpuinfo to get that information or just watching
> > as it boots? Also, what do you get if you do this:
> >
> i was actually watching 'top' i could never get the smp
On 12/13/05, Nick Smith <[EMAIL PROTECTED]> wrote:
> seems to look correct doesnt it? its just not showing up as two cpus,
> :-\ what do you think?
I think HT support is tied somehow to ACPI. Do you have ACPI support
built into your kernel?
-Richard
--
gentoo-user@gentoo.org mailing list
On 12/13/05, Jeff Williams <[EMAIL PROTECTED]> wrote:
> Are you viewing /proc/cpuinfo to get that information or just watching
> as it boots? Also, what do you get if you do this:
>
i was actually watching 'top' i could never get the smp function to
work. here is what cpuinfo gives:
mail ~ # cat /
Are you viewing /proc/cpuinfo to get that information or just watching
as it boots? Also, what do you get if you do this:
grep -i 'smp' /boot/config
If you don't have a symbolic link from /boot/config to your kernel
config you will have to change the path somewhat (for example,
/boot/config-2.6.1
just did a reinstall of my gentoo box, (been almost a year or so) and
for some reason this time around it doesnt see my hyperthreading p4 as
two cpu's anymore, i have hyperthreading and smp support turned on in
the kernel like i had before. is this normal? what can i do to get
gentoo to see this m
On 10/20/05, Statux <[EMAIL PROTECTED]> wrote:
> On Thu, 2005-10-20 at 18:00 -0700, Mark Knecht wrote:
>
> > I'm not having your SMP problem but I did have the keyboard hang when
> > I first tried going to SMP. In you have a USB keyboard available it
> > will likely not have the problem. Someone on
On Thu, 2005-10-20 at 21:10 -0400, Statux wrote:
> On Thu, 2005-10-20 at 18:00 -0700, Mark Knecht wrote:
>
> Well I manage an electronics department somewhere in this world so
> getting a new keyboard won't be an issue (just a little money). I've
> been so happy using my Microsoft keyboard which i
On Thu, 2005-10-20 at 18:00 -0700, Mark Knecht wrote:
> I'm not having your SMP problem but I did have the keyboard hang when
> I first tried going to SMP. In you have a USB keyboard available it
> will likely not have the problem. Someone on the LKML also suggested a
> boot option called 'usb-han
On 10/20/05, Statux <[EMAIL PROTECTED]> wrote:
>
> I can't test this any further with my disappearing keyboard issue.
>
I'm not having your SMP problem but I did have the keyboard hang when
I first tried going to SMP. In you have a USB keyboard available it
will likely not have the problem. Someo
On Thu, 2005-10-20 at 16:15 -0500, Jeff Smelser wrote:
> This sounds kinda dumb, but I would pull out a gentoo live CD and see if it
> detects it. If it doesnt, there is something bios/hardware wise wrong with
> your setup, if it does, we can start going through kernel wise..
Interesting news,
On Thu, 2005-10-20 at 15:46 -0600, Dennis wrote:
> You may check into that possiblility before wasting too much time
> tweeking kernel options.
This motherboard, BIOS, and CPU all do support it. The problem seems to
be that ACPI fails to start for some reason. Solving that should fix
everything.
Statux wrote:
> Hello all.
>
> I've done a fair amount of research in order to try and solve the issue
> of my HyperThreading not getting enabled. I, however, have not gotten
> anywhere with it.
>
> I've got a 3.0GHz P4 with HyperThreading (Intel 531 processor for those
> of you who know of the I
On Wednesday 19 October 2005 10:55 pm, Statux wrote:
> I've got a 3.0GHz P4 with HyperThreading (Intel 531 processor for those
> of you who know of the Intel Processor Numbers) - kernel 2.6.13. I've
> enabled SMP and the HT scheduling option in the kernel config along with
> ACPI as I was told tha
On Wed, 2005-10-19 at 21:25 -0700, Richard Fish wrote:
[snip]
> Try adding acpi=ht to your kernel command line, which will enable just
> enough of ACPI to get hyperthreading working.
I tried adding that and the kernel recognises that I've tried the option
but ACPI still won't start up (I even r
On Thu, 2005-10-20 at 15:27 +0930, Iain Buchanan wrote:
[snip]
> CONFIG_ACPI_PROCESSOR=y
> CONFIG_NR_CPUS=2
You've probably got certain things selected under ACPI because you're
using a laptop. This is merely a desktop system so all I really need to
do, as far as I know - correct me if I'm wrong
On Wed, 2005-10-19 at 23:55 -0400, Statux wrote:
> Hello all.
> I've got a 3.0GHz P4 with HyperThreading (Intel 531 processor for those
> of you who know of the Intel Processor Numbers) - kernel 2.6.13.
I have a 3.0GHz P4 HT in my laptop, with HT working fine(ish) on 2.6.13
I did some random gre
Statux wrote:
Hello all.
current situation. I did recall that I had ACPI turned off in BIOS which
logically should be on for the kernel to get any hardware backing but
enabling it caused my keyboard to work up until a few seconds after the
login prompt comes up. After that, it locks up (LEDs do
Hello all.
I've done a fair amount of research in order to try and solve the issue
of my HyperThreading not getting enabled. I, however, have not gotten
anywhere with it.
I've got a 3.0GHz P4 with HyperThreading (Intel 531 processor for those
of you who know of the Intel Processor Numbers) - kern
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