The CDT and copywaza lab

[KTE]

Copywaza is an old method - well known and I've ran it countless times before. Gets me about 8-5 seconds drop usually (at a Pi test which runs in 15-10 minutes).

May i ask whats going on?

I think he just got THE TWEAK working full scale Cant wait the report.

Its tricky but it ONLY works if you get it just right and boy does it work well. Damn what a tweak, this is more a miracle!

Took me around 15 attempts over two days to learn it right and EVEN still I've not perfected it no where near to the screenshots I saw of OPB. The guy will slaughter anyones Pi times with this tweak at the same clocks, timings, hardware, and settings. Make no mistake about that.

[before]

Took me around 15 attempts over two days to learn it right and EVEN still I've not perfected it no where near to the screenshots I saw of OPB. The guy will slaughter anyones Pi times with this tweak at the same clocks, timings, hardware, and settings. Make no mistake about that.

lol

So what about teaching us dude? I eventually tried it and not succeeded in beating my cw method... may be you know something else, something we don't know. I'm not sarcastic, honestly if something exists, I really would like to learn it.

[dinos22]

lol

So what about teaching us dude? I eventually tried it and not succeeded in beating my cw method... may be you know something else, something we don't know. I'm not sarcastic, honestly if something exists, I really would like to learn it.

i'm with you on that one Xavier heheh

[massman]

lol

So what about teaching us dude? I eventually tried it and not succeeded in beating my cw method... may be you know something else, something we don't know. I'm not sarcastic, honestly if something exists, I really would like to learn it.

And how does you CW method work?

[KTE]

lol

So what about teaching us dude? I eventually tried it and not succeeded in beating my cw method... may be you know something else, something we don't know. I'm not sarcastic, honestly if something exists, I really would like to learn it.

I followed the same routine you did from reading here late on. Kev did all the work and my utter thanks to him for putting up with **** when he could do and new what no one else here did. Rather than keeping it hidden he spoke openly and tried to help everyone get and beat his times. Salute to that.

If I get hold of a Phenom straight after release and someone else has one to test as comparison then I'll show you the time difference it can make if done properly. Pretty damn sure about that. Just run it as good as you can and try to keep variations out of it as little things can make it fluck. You've seen my 8M results above with a Presy Celeron (similar to your 32M) and I'll show you my new test results for CopyWaza and CDT. Just at work yet.

Did you get your system cache and available memory above 450MB or 500MB each before running Pi? You need to do that, read kevs words properly honestly. He 'aint kidding. You need to balance both values and have them as high as possible or it doesn't quite show its true nature.

There's no doubt the tweak influences hardware caches, buffers and prefetch. It decreases latency very much (I've only tested on a slow CPU yet, it may give less drops in time on a faster core).

BRB

[dinos22]

KTE
it would be nice to see your conroe 3.6Ghz times
that's the best indication and comparison points for this

[Zeus]

Man i hope you're right.

I 'm not sure you can replicate the very same thing with a C2D setup though.

Last night i really tried hard, got 527984 for available memory and 532088 for Systemcache, which to me is close to supreme but i did not see the accelaration in the third group of loops as it should.

I'm not done testing myself as i still have faith in this tweak and hope to get it working properly on my C2D setup.

Reading all OPB's ramblings on this subject makes me feel like a complete n00b, the study he made in SuperPi calculation time is nothing short of awesome.

Just trying to comprehend all this complicated stuff takes some time.

[mrlobber]

...You need to balance both values ...

That's the goal I've failed to reach with my 3.6Ghz C2D testing so far.

[kiwi]

That's the goal I've failed to reach with my 3.6Ghz C2D testing so far.

If balance means start 32M when system cache = available memory then that is easy to do with CDT, at least I always can

[Zeus]

Having the available cache matching the system is cache is easy, i accomplished that in each and every copy waza session i did, most often available cache is even exceeding system cache by a small amount.

I think the whole memory subsystem is in balance if one can achieve ~512mb for both.

[mrlobber]

Having the available cache matching the system is cache is easy, i accomplished that in each and every copy waza session i did, most often available cache is even exceeding system cache by a small amount.

This NEVER happens for me, never. The only way I can get available memory > system cache is when I rar a big file in superpi's folder right before the 32M run. In all other cases (copywaza, CDT, whatever) I see a pattern like available memory + 20 Mb = system cache. The OS is the default XP SP2 Corporate install with initial "commit charge" after reboot showing between 60 and 70 Mb (I wonder where people get those 100+ Mb figures with "clean install"? ) Right now, testing Windows 2003 server with the same results.

Have tried both IDE as well as SATA HDD's, 2Mb and 8Mb cache as well.

[massman]

Did you get your system cache and available memory above 450MB or 500MB each before running Pi? You need to do that, read kevs words properly honestly. He 'aint kidding. You need to balance both values and have them as high as possible or it doesn't quite show its true nature.

The higher the better?

I'm running with systemcache over 560MB and Available memory over 550MB.

[BeardyMan]

The higher the better?

I'm running with systemcache over 560MB and Available memory over 550MB.

no, otherwise you wouldn't been setting 600 or 680 as a max, then you could just leave it like that 2048/4096 etc..

I've done some more testing ,i lend a seagate 160GB 16Mb hdd yesterday 7200rpm and compared it to the same disk but 8Mb and a maxtor 5Gb wich has i believe no buffer

maxmem 680 + no pagefile + 632mb file + performance set to systemcache + 160Gb 8Mb = average gain of 0.7secs in SPI 1M on my AMD rig.

maxmem 680 + no pagefile + 632mb file + performance set to systemcache + 160Gb 16Mb = average gain of 0.9secs in SPI 1M on my AMD rig.

maxmem 680 + no pagefile + 632mb file + performance set to systemcache + maxtor 5gb = average gain of 0.2/3secs in SPI 1M on my AMD rig.

the best HDD woudl be this,
150 GB, 10.000 rpm, 4.5ms Zugriffszeit, 16MB Cache,

10k rpm instead of 7200
4.5ms instead of the 8.9/8.5 and ofcourse 16mb cache.