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Re: TS 8.2 w/ HT or multi processors



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Hi Jimmy,

By full HT I mean as run by XP. W2000 doesn't fully support all the little HT tricks. On multi-processors... some folks on the TS lists with dual processor systems were having some similar things, but not as bad as me.

Good info. Makes me more convinced I have a dead rat someplace. Just can't figure out where. Brand new, absolutely clean XP install. Ran the latest intel inf file, installed drivers and that's it.

Supposedly the best thing now is the new core2duo. Shares caches between cores. I hate to go thru the hassle - while the stuff that I use looks complex, virtually nothing is realtime. Fed mtg today my cpu just got up to 50% for a couple of minutes. Normally it runs 5-15%.

There are a lot of folks that think that HT is not really compatible with TS, find they work better without. I am wondering if there is some fine point of the setup that gets commonly blotched... a couple of other folks besides you said theirs worked fine. Geez, I hate messing with this stuff.

I figured out how to properly switch XP to no HD (along with bios) and think I will try that tomorrow. See how it goes.

Thanks again,
Chris


----- Original Message ----- From: "Jimmy Snowden" <jhsnowden@xxxxxxxxxxxxx> To: "Chris Cheatham" <chris_c@xxxxxxxxxx>; "Omega-List" <omega-list@xxxxxxxxxx>
Sent: Thursday, March 22, 2007 12:35 AM
Subject: Re: TS 8.2 w/ HT or multi processors


Chris,

Never had a problem with it. Only ran TS8 on a hyperthreading machine. Ran versions 3159, 3247 and 3258. I am unclear what you mean by full hyperthreading. Also unclear what you mean by hyperthreading/multi-processors. I used a dual processor for years with TS2ki. Only way to go. Now use a hyperthreading machine for TS2ki and TS8. Works fine even with both TS programs running. Have not run a new processor with two processors on one chip. Should make no negative effects. My guess is you did something fancy and messed it up. I'm not even sure TS8 can utilize a dual or hyperthreading processor properly. TS2ki can.

Give us more detail as to what you did or just undo it.


Jimmy



Hi gang,

Anyone out there know much about hyperthreading/multi-processors? I finally gave up my trusty old Win 2000 for XP, and set up my P IV to do full HT. I'm having some really bizarre problems with TS 8.2. It might just be something
going on with TS - seems quite a few folks have issues now - but given the
magnitude of what I am seeing and the new install I still wonder if
something else might contribute.

What is happening is the are amazingly large context switchs by the orplat
and orchart services, and mainly when both charts and matrix/market depth
windows are open at the same time. By large I mean stable 10-20,000/sec, and with volume can easily climb to 70-80,000. The same processor with w2000/ no
HT would maybe hit 2000 on very busy times.  Along with the context
switches, both orchart and orplat are running way more cpu than they should.
For example, a single matrix used to run maybe 1-2 pct on orplat. Now it
15-30%. And orchart cpu use increases considerably due to the switching as
well. The more matrix windows, the more switching.

If you close the matrix window and just run charts, everything is fine.
There will be an occasional blip really high, but the devastating  cpu
effect is gone . OK, now here's the kicker... if you set the affinity of
orplat and orchart to the same cpu, the switching goes away. So that makes
me thing that it's a cache miss or common memory thing. Affinities are not a
good solution long term though, as it is much easier to peg half the
processor.

I have tried everything I can think of and can't find anything wrong on the
pc. Intel Inf files were run...then I ran all the Intel HT diagnostics and
they are perfect. Bios is current. I tried running with nothing else at all
on the pc. Nothing changes. Other than inability to use matrix, HT is much
smoother than without. FED day today was super smooth.

I know there are some PC wizards out there. If anyone has any ideas, I'd be
most appreciative.

Best,
Chris