quick question about P4 HT install

U D13 N0W · 06-27-08, 02:41 PM

gotta quick question about installing on a P4 HT system. How do i go about setting up a client on the second core?
Im trying to run two seperate clients on this rig b/c it is not on too often so a SMP would be impractical.

drshivas · 06-27-08, 02:57 PM

While you can run two instances of a single core client on a HT enabled P4, Stanford asks that you do not. It slows down the science being done b/c it takes longer for two units to be completed. Besides, the ppd gain from doing so isn't that dramatic.

If you choose to do so, make two separate folders, fah1 and fah2, and select advanced setup options when setting your config. The last option should be machine id. Set the first instance in fah1 folder to 1 and the second instance in fah2 folder to 2.

deadlysyn · 06-27-08, 06:12 PM

The last time I tried doing this, the gain in PPD was not worth the slowdown as far as the science is concerned IMO. Just keep in mind, the P4 with HT is not a true dual core, instead it basically "virtualizes" a second core, so Winderz will still think it is a dual core CPU. Even though Task Manager will say you are only folding at 50%, you are actually folding at 100% (I like to think of this as a flaw in Microsofts programming). By running 2 clients simultaneously, you are essentially only using half the core to run one WU, while the other half is working the other. Depending on which P4 it is, it may be able to just barely make SMP deadlines, as I know ChasR has a few folding SMP. I do believe they are pretty dedicated to be able to make the SMP deadlines.

U D13 N0W · 06-28-08, 04:43 PM

Quote:

Originally Posted by deadlysyn

The last time I tried doing this, the gain in PPD was not worth the slowdown as far as the science is concerned IMO. Just keep in mind, the P4 with HT is not a true dual core, instead it basically "virtualizes" a second core, so Winderz will still think it is a dual core CPU. Even though Task Manager will say you are only folding at 50%, you are actually folding at 100% (I like to think of this as a flaw in Microsofts programming). By running 2 clients simultaneously, you are essentially only using half the core to run one WU, while the other half is working the other. Depending on which P4 it is, it may be able to just barely make SMP deadlines, as I know ChasR has a few folding SMP. I do believe they are pretty dedicated to be able to make the SMP deadlines.

Thanks for the info. I hadn't known all the details with HT. It sounds like a sales scam to make people think they are getting more for their money. Glad to know I'm actually getting 100% of the CPU on the folding. Also thanks to drshivas

deadlysyn · 06-28-08, 06:46 PM

It wasn't really a sales scam. There was something implemented in the architecture that makes it work somewhat like a dual core, but doesn't quite get close to the same speed increase. What you are likely to see is just a 30% increase, but at the time, you will still be slowing down the WU's which is bad for the science. Here is a Wiki article about HT that I have found. Hope this helps understand it a bit.

U D13 N0W · 06-29-08, 12:49 AM

thanks for the info

deadlysyn · 06-29-08, 03:59 PM

Glad I could be of some help. I just personally set up the SMP client on my 530J, but that is with a pretty good OC. I am hoping that it will make deadlines. It hasn't quite been long enough to get a PPD or TPF estimate from either FAHSpy or FAHMon, but as soon as I have those numbers, I will be sure to post them up.

06-27-08, 02:41 PM	Thread Starter #1
U D13 N0W Join Date: Mar 2008 Location: Maryland	quick question about P4 HT install gotta quick question about installing on a P4 HT system. How do i go about setting up a client on the second core? Im trying to run two seperate clients on this rig b/c it is not on too often so a SMP would be impractical. __________________ Don't just waste your spare CPU cycles, Fold for T32 Main rig- Dell Inspiron 9300, Pentium M SL7SM 2.0GHz/2M/533, 2GB mem., ATI M300, Win XP. Undervolted for some nice icy laptop temps Folding rigs- 4X AOpen i915GMm-N, 1GB mem. each, Pentium Ms each OCed to 2.4GHz (yes i finally got them all to 2.4) All 11.6GHz folding for T32 RIP Official OCF podcast
	QUOTE Thanks

06-27-08, 02:57 PM	#2
drshivas Sith Lord Join Date: Jun 2003 Location: Maryland, USA	While you can run two instances of a single core client on a HT enabled P4, Stanford asks that you do not. It slows down the science being done b/c it takes longer for two units to be completed. Besides, the ppd gain from doing so isn't that dramatic. If you choose to do so, make two separate folders, fah1 and fah2, and select advanced setup options when setting your config. The last option should be machine id. Set the first instance in fah1 folder to 1 and the second instance in fah2 folder to 2.
	QUOTE Thanks

06-27-08, 06:12 PM	#3
deadlysyn Folding Team Content Editor Who Dolk'd my stars Senior Member Join Date: Mar 2005 Location: Stealing your megahurtz at night	The last time I tried doing this, the gain in PPD was not worth the slowdown as far as the science is concerned IMO. Just keep in mind, the P4 with HT is not a true dual core, instead it basically "virtualizes" a second core, so Winderz will still think it is a dual core CPU. Even though Task Manager will say you are only folding at 50%, you are actually folding at 100% (I like to think of this as a flaw in Microsofts programming). By running 2 clients simultaneously, you are essentially only using half the core to run one WU, while the other half is working the other. Depending on which P4 it is, it may be able to just barely make SMP deadlines, as I know ChasR has a few folding SMP. I do believe they are pretty dedicated to be able to make the SMP deadlines. __________________ Water and Air Cooling Lead Senior Folding for Team 32 as 8thDeadlySyn Folding in the memory of pscout I'm a Team 32 Folding Mentor. Ask me about Folding. Gigabyte GA-EP45-UD3LR, Q9550@3.5, 4 GB Corsair Dominator DDR2-1066, Corsair Force F60, 300 GB Maxtor SATAII, EVGA GTX460 v2 Laing D5 Vario, D-Tek Fuzion V1, Swiftech MCW60, Swiftech MCRES V2, HWLabs BIX3, 3 Panaflo FBA12G12U's on Rheobus, Primochill LRT black, Antec 900 Gigabyte GA-MA790FXT-UD5P, Athlon II X3 445, TRU120, 4 GB Kingston HyperX DDR3-1600, 8800GTS 320MB, 320 GB Maxtor Sata, SB Audigy SE HEAT - My Folding Stats Would you like to see your writing on the front page? Ask me how! Last edited by m0r7if3r on 1-23-2011 at 12:45 PM. Reason: I haz uber 1337 h4x0rz 5k1llz
	QUOTE Thanks

06-28-08, 06:46 PM	#5
deadlysyn Folding Team Content Editor Who Dolk'd my stars Senior Member Join Date: Mar 2005 Location: Stealing your megahurtz at night	It wasn't really a sales scam. There was something implemented in the architecture that makes it work somewhat like a dual core, but doesn't quite get close to the same speed increase. What you are likely to see is just a 30% increase, but at the time, you will still be slowing down the WU's which is bad for the science. Here is a Wiki article about HT that I have found. Hope this helps understand it a bit. __________________ Water and Air Cooling Lead Senior Folding for Team 32 as 8thDeadlySyn Folding in the memory of pscout I'm a Team 32 Folding Mentor. Ask me about Folding. Gigabyte GA-EP45-UD3LR, Q9550@3.5, 4 GB Corsair Dominator DDR2-1066, Corsair Force F60, 300 GB Maxtor SATAII, EVGA GTX460 v2 Laing D5 Vario, D-Tek Fuzion V1, Swiftech MCW60, Swiftech MCRES V2, HWLabs BIX3, 3 Panaflo FBA12G12U's on Rheobus, Primochill LRT black, Antec 900 Gigabyte GA-MA790FXT-UD5P, Athlon II X3 445, TRU120, 4 GB Kingston HyperX DDR3-1600, 8800GTS 320MB, 320 GB Maxtor Sata, SB Audigy SE HEAT - My Folding Stats Would you like to see your writing on the front page? Ask me how! Last edited by m0r7if3r on 1-23-2011 at 12:45 PM. Reason: I haz uber 1337 h4x0rz 5k1llz
	QUOTE Thanks

06-29-08, 12:49 AM	Thread Starter #6
U D13 N0W Join Date: Mar 2008 Location: Maryland	thanks for the info __________________ Don't just waste your spare CPU cycles, Fold for T32 Main rig- Dell Inspiron 9300, Pentium M SL7SM 2.0GHz/2M/533, 2GB mem., ATI M300, Win XP. Undervolted for some nice icy laptop temps Folding rigs- 4X AOpen i915GMm-N, 1GB mem. each, Pentium Ms each OCed to 2.4GHz (yes i finally got them all to 2.4) All 11.6GHz folding for T32 RIP Official OCF podcast
	QUOTE Thanks

quick question about P4 HT install

Internet Services

Website Development

Tech Hardware

06-29-08, 03:59 PM	#7
deadlysyn Folding Team Content Editor Who Dolk'd my stars Senior Member Join Date: Mar 2005 Location: Stealing your megahurtz at night	Glad I could be of some help. I just personally set up the SMP client on my 530J, but that is with a pretty good OC. I am hoping that it will make deadlines. It hasn't quite been long enough to get a PPD or TPF estimate from either FAHSpy or FAHMon, but as soon as I have those numbers, I will be sure to post them up. __________________ Water and Air Cooling Lead Senior Folding for Team 32 as 8thDeadlySyn Folding in the memory of pscout I'm a Team 32 Folding Mentor. Ask me about Folding. Gigabyte GA-EP45-UD3LR, Q9550@3.5, 4 GB Corsair Dominator DDR2-1066, Corsair Force F60, 300 GB Maxtor SATAII, EVGA GTX460 v2 Laing D5 Vario, D-Tek Fuzion V1, Swiftech MCW60, Swiftech MCRES V2, HWLabs BIX3, 3 Panaflo FBA12G12U's on Rheobus, Primochill LRT black, Antec 900 Gigabyte GA-MA790FXT-UD5P, Athlon II X3 445, TRU120, 4 GB Kingston HyperX DDR3-1600, 8800GTS 320MB, 320 GB Maxtor Sata, SB Audigy SE HEAT - My Folding Stats Would you like to see your writing on the front page? Ask me how! Last edited by m0r7if3r on 1-23-2011 at 12:45 PM. Reason: I haz uber 1337 h4x0rz 5k1llz
	QUOTE Thanks

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search