----- Original Message -----
From: "Shane Robinett" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: 28 May 2004 15:27
Subject: Re: [hlds] Questions again And my opinion
> BeNT -
>
> When looking at the HT Xeons in task manager, you really need to figure on
> doubling the % reported as true work being done. If it says 20% - assume
> it's at 40%.
Actually dual with HT u need to * 4 not 2 as u look in taskman u will see
4 CPU's its calculation is % of total processing power and it assumes
for this each cpu is capable of the same.
> While we have tested dual 2.4/2.6's with HT on and HT off and feel we get
> better performance with the HT on, the task manager seems to not report the
> true usage.
It reports true usage with the proviso that each cpu can perform the same
amount which it cant :(
> 60% for a 32 man - full on a dual 2.6 or 2.8 seems a wee bit harsh. I can
> get away with running 2 32man servers on a similiar box and not report any
> lag or choke from CPU.
Indeed 2 * 32 would be fine on a dual ( not a single ) as I was quoting %'s of
a single CPU so with a you could have 1 server using 60% of CPU #1 and
the other 60% of CPU #2
You always need to normalise CPU %'s to that of a Single CPU be that
virtual or physical. Also need to be aware that even though taskman in
windows shows 4 CPU's with HT enabled and each can reach 100%
you will not be seeing the ability to run 2 times that which u can run
without it enabled at most is 1.3 times and most the time not even that.
Steve / K
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