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Search: Posts Made By: alexkan
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No wisdom files are needed if you're on an Intel... 131,816 Views / 1,309 Replies  
No wisdom files are needed if you're on an Intel Mac. Even if you're on PowerPC, wisdom files from the past should probably not be used with v8 builds because of version differences between the FFTW...
Posted by alexkan, on Oct 9, 2007 at 10:19 PM, in Team MacNN
Actually, I'm more interested in the fact that... 131,816 Views / 1,309 Replies  
Actually, I'm more interested in the fact that you're seeing the new apps being slower than the old apps primarily on shorter WUs, which points to some sort of difference in the FFTW libraries...
Posted by alexkan, on Oct 8, 2007 at 12:13 PM, in Team MacNN
O ye of little faith! No, I didn't forget... 131,816 Views / 1,309 Replies  
O ye of little faith!

No, I didn't forget about all of you, but as time went on, it became easier to just do small-scale (rather than real-world) testing. Also, it eventually became clear to me...
Posted by alexkan, on Oct 7, 2007 at 11:31 PM, in Team MacNN
This could be happening because the app is built... 131,816 Views / 1,309 Replies  
This could be happening because the app is built against a relatively old version of the BOINC libraries. I haven't made a habit of actually building from something more recent from CVS, so in theory...
Posted by alexkan, on Aug 24, 2007 at 02:12 AM, in Team MacNN
[I am currently unable to post to the main SETI... 3,279 Views / 33 Replies  
[I am currently unable to post to the main SETI boards because my RAC is too low, so if someone could link to this post in one of the relevant discussions on the main boards, that would be fantastic....
Posted by alexkan, on Aug 22, 2007 at 04:33 AM, in Team MacNN
Last I checked, the analysis that the app does... 1,770 Views / 7 Replies  
Last I checked, the analysis that the app does hasn't changed for MB, so in theory, current apps accompanied by modified app_info.xml files would produce valid science. However, the issue of credit...
Posted by alexkan, on Aug 9, 2007 at 02:57 AM, in Team MacNN
I think you've asking a very good question. As... 131,816 Views / 1,309 Replies  
I think you've asking a very good question. As things are now, I actually maintain two Xcode projects in order to build with ICC for x86 and GCC for PPC, so perhaps I should just release the two...
Posted by alexkan, on Jun 6, 2007 at 02:35 AM, in Team MacNN
Make sure your brother's Mac Pro has all four... 131,816 Views / 1,309 Replies  
Make sure your brother's Mac Pro has all four memory channels occupied with matching FB-DIMMs. SETI is sensitive to memory bandwidth, so having only two of the four channels populated (which is often...
Posted by alexkan, on Jun 4, 2007 at 12:22 PM, in Team MacNN
Yes, I'm still alive. Unfortunately, performance... 131,816 Views / 1,309 Replies  
Yes, I'm still alive. Unfortunately, performance on v8 is not yet where I want it to be on PowerPC, so I'm going to take some time to investigate whether or not I'm overlooking something. I also...
Posted by alexkan, on May 14, 2007 at 02:53 AM, in Team MacNN
Sorry to keep you guys waiting! Yes, beta testing... 131,816 Views / 1,309 Replies  
Sorry to keep you guys waiting! Yes, beta testing for Core2 processors is at a point where I'd say those apps are ready for release. However, I want to do a simultaneous release for PowerPC and x86,...
Posted by alexkan, on Apr 12, 2007 at 02:23 AM, in Team MacNN
Your times seem about right for a Core Duo at... 131,816 Views / 1,309 Replies  
Your times seem about right for a Core Duo at that clockspeed. It's reasonable for a similarly-clocked Core 2 Duo to vastly outperform your Core Duo, because the architectural improvements in...
Posted by alexkan, on Mar 25, 2007 at 04:31 PM, in Team MacNN
While a good portion of the work that SETI does... 598 Views / 2 Replies  
While a good portion of the work that SETI does on a single WU does a good job of fitting in the L2 cache, there is also a sizable portion of the WU that doesn't fit as well, and which tends to...
Posted by alexkan, on Mar 9, 2007 at 03:34 AM, in Team MacNN
If you are the owner of a Mac Pro and would like... 131,816 Views / 1,309 Replies  
If you are the owner of a Mac Pro and would like to collect numbers for a prerelease app, please send me a PM with contact info. Dual-core C2D Intel owners, I already have a machine to test on. :p...
Posted by alexkan, on Feb 27, 2007 at 03:36 AM, in Team MacNN
Yep, I have changes in the works to relieve... 131,816 Views / 1,309 Replies  
Yep, I have changes in the works to relieve memory bandwidth pressure. I believe this will help real-world performance on multiprocessor Macs, but I'll need to verify this on other machines besides...
Posted by alexkan, on Feb 17, 2007 at 12:33 PM, in Team MacNN
E.T, have you increased the amount of shared... 131,816 Views / 1,309 Replies  
E.T, have you increased the amount of shared memory available on the machine? Considering how many problems the Quads (both PPC and Intel) have had, I can imagine that this beast needs the shared...
Posted by alexkan, on Jan 15, 2007 at 11:40 AM, in Team MacNN
It looks like you're having issues with shared... 131,816 Views / 1,309 Replies  
It looks like you're having issues with shared memory, which are most likely to pop up when a lot of instances of the SETI cruncher are starting and stopping. The WUs that result in -9...
Posted by alexkan, on Jan 4, 2007 at 12:18 AM, in Team MacNN
Actually, there might be. The PPC and x86... 131,816 Views / 1,309 Replies  
Actually, there might be. The PPC and x86 versions of the app tend to leapfrog each other in terms of optimization, so there are some things in v7.2 for x86 that weren't in v7.1 for PPC. I'm hesitant...
Posted by alexkan, on Dec 31, 2006 at 10:28 PM, in Team MacNN
I don't have any high-level tweaks that I want to... 131,816 Views / 1,309 Replies  
I don't have any high-level tweaks that I want to test right now, but I may still be able to tune the x86 assembly I've written, since the current Intel chips are more out-of-order processors than...
Posted by alexkan, on Dec 31, 2006 at 02:21 AM, in Team MacNN
Hopefully I'm not more than a couple days late,... 131,816 Views / 1,309 Replies  
Hopefully I'm not more than a couple days late, but I wanted to mark the occasion of the PowerMac G5 Quad leaving the first page of the Top Computers list on SETI for the last time. :( It was a good...
Posted by alexkan, on Dec 26, 2006 at 12:42 AM, in Team MacNN
You're not doing anything wrong--the WUs worth... 131,816 Views / 1,309 Replies  
You're not doing anything wrong--the WUs worth 58.69 credits take disproportionately long. You'll find that most other WUs in that credit range take less time to crunch.

Also, I noticed that...
Posted by alexkan, on Dec 18, 2006 at 12:13 AM, in Team MacNN
Links in my original post are now... 131,816 Views / 1,309 Replies  
Links in my original post are now corrected--thanks to njmaugbill and Bad to the bone for pointing it out and offering corrections, respectively.

adream, that Frankenmac of yours is turning in...
Posted by alexkan, on Dec 11, 2006 at 04:11 AM, in Team MacNN
v7.2 for Intel Macs released (now with a Core2-specific binary!) 131,816 Views / 1,309 Replies  
More goodies for you all (the MacNN forums will always have the jump on the main SETI forums by however long it takes me to write these posts)...

v7.2-coreduo-nographics...
Posted by alexkan, on Dec 10, 2006 at 04:31 AM, in Team MacNN
Autosaving in Emacs doesn't work the way you... 131,816 Views / 1,309 Replies  
Autosaving in Emacs doesn't work the way you think it does. (It saves to a temporary file so that you can recover from a lost session.) To save in Emacs after you make the modifications, you need to...
Posted by alexkan, on Nov 11, 2006 at 02:30 PM, in Team MacNN
For the most part, I wouldn't worry about... 131,816 Views / 1,309 Replies  
For the most part, I wouldn't worry about problems unless they're causing you to crash, misclaim credit or fail to validate, since these are the only sorts of effects that my changes are likely to...
Posted by alexkan, on Oct 27, 2006 at 10:57 AM, in Team MacNN
Don't compare the times on two work units unless... 131,816 Views / 1,309 Replies  
Don't compare the times on two work units unless they're within +/- 0.5 of each other in terms of claimed credit. Crunch times vary a lot more than they used to in SETI Enhanced.
Posted by alexkan, on Oct 27, 2006 at 10:41 AM, in Team MacNN
Well, there were a couple other things that I... 131,816 Views / 1,309 Replies  
Well, there were a couple other things that I want to pursue, but v7.1 is already enough of an improvement over v6 that I might as well put this out now and release v7.2 later... :P
...
Posted by alexkan, on Oct 26, 2006 at 11:44 AM, in Team MacNN
The Core 2 Duo in your iMac has quite a few... 802 Views / 13 Replies  
The Core 2 Duo in your iMac has quite a few architectural advantages over the Core Duos (note the lack of number) that have powered MacBook Pros up until yesterday. C2Ds are much more efficient,...
Posted by alexkan, on Oct 26, 2006 at 01:29 AM, in Team MacNN
Haha, it feels like my entire installed user base... 131,816 Views / 1,309 Replies  
Haha, it feels like my entire installed user base has volunteered to beta test v7.1...:p

Those of you who got in early found out that I pulled the clients because of initial worries about...
Posted by alexkan, on Oct 18, 2006 at 02:03 AM, in Team MacNN
Anyone interested in testing a PPC beta of v7.1?... 131,816 Views / 1,309 Replies  
Anyone interested in testing a PPC beta of v7.1? Drop me a PM if you do...I want to see it successfully crunch a couple real-world WUs before I release it into the wild. Yes, I'm calling it v7.1...
Posted by alexkan, on Oct 16, 2006 at 03:09 AM, in Team MacNN
It's coming, it's coming...I've had less time to... 131,816 Views / 1,309 Replies  
It's coming, it's coming...I've had less time to code recently, when you consider both that my day job sometimes becomes my evening job as well, and that my brain is sometimes too tired to keep...
Posted by alexkan, on Oct 11, 2006 at 12:24 AM, in Team MacNN
If I had to venture a guess, I'd say that amount... 131,816 Views / 1,309 Replies  
If I had to venture a guess, I'd say that amount of noise is normal. Based how your performance changed after the second stick of RAM, I'd say the silence from before was basically because your cores...
Posted by alexkan, on Sep 22, 2006 at 02:14 AM, in Team MacNN
Tom, are you still running on 2 FB-DIMMs? 131,816 Views / 1,309 Replies  
Tom, are you still running on 2 FB-DIMMs?
Posted by alexkan, on Sep 20, 2006 at 04:09 PM, in Team MacNN
First of all, v7 is compiled with the Intel... 131,816 Views / 1,309 Replies  
First of all, v7 is compiled with the Intel compiler and uses IPP for FFTs, instead of FFTW. Additionally, some functions have been tuned to run better on the new Core architecture. (Core Duos...
Posted by alexkan, on Sep 19, 2006 at 02:54 AM, in Team MacNN
It looks like E.T has updated his C2D Mac mini to... 131,816 Views / 1,309 Replies  
It looks like E.T has updated his C2D Mac mini to run v7. Take a look at the times he's turning in--that's the new Core architecture for you. Keep in mind that that chip is only running at 2.16 GHz...
Posted by alexkan, on Sep 17, 2006 at 11:39 PM, in Team MacNN
Go ahead and compare--the science is the same. :) 131,816 Views / 1,309 Replies  
Go ahead and compare--the science is the same. :)
Posted by alexkan, on Sep 16, 2006 at 01:06 PM, in Team MacNN
No, binaries are operating system-specific. As... 131,816 Views / 1,309 Replies  
No, binaries are operating system-specific. As for Windows, there's always Simon Zadra's clients. I don't think I have the additional tools necessary to roll a fast binary on Windows, anyway.
Posted by alexkan, on Sep 16, 2006 at 12:01 PM, in Team MacNN
I know most of these WU links are dead, but it's... 131,816 Views / 1,309 Replies  
I know most of these WU links are dead, but it's important to look at the actual clock speed that people are running these chips at, since the chip identifies itself as its stock clock speed, rather...
Posted by alexkan, on Sep 15, 2006 at 03:21 AM, in Team MacNN
...and that's why you all need to hurry up and... 131,816 Views / 1,309 Replies  
...and that's why you all need to hurry up and buy Mac Pros, so we can reclaim that list!
Posted by alexkan, on Sep 6, 2006 at 03:16 AM, in Team MacNN
It looks like I'm going to have to shelve GPUFFTW... 131,816 Views / 1,309 Replies  
It looks like I'm going to have to shelve GPUFFTW for now, at least until ATI_draw_buffers/ARB_draw_buffers is supported in OS X.


Well, there is software available, but what I've done for SETI...
Posted by alexkan, on Aug 21, 2006 at 03:18 AM, in Team MacNN
Of course. I might only wind up pulling the bare... 799 Views / 5 Replies  
Of course. I might only wind up pulling the bare minimum required for my clients to behave like 5.17/5.18 clients, but there will definitely need to be changes made. It sounds like I still have some...
Posted by alexkan, on Aug 21, 2006 at 03:11 AM, in Team MacNN
Great! It's good to see confirmation that what... 131,816 Views / 1,309 Replies  
Great! It's good to see confirmation that what I'm working on for v7 is making a difference. It looks like I still have some tuning to do, though, so don't expect me to release v7 tomorrow.

From...
Posted by alexkan, on Aug 14, 2006 at 03:18 AM, in Team MacNN
From what I've seen, the 2.66 GHz Mac Pro sounds... 131,816 Views / 1,309 Replies  
From what I've seen, the 2.66 GHz Mac Pro sounds like your best bet. Going down 667 MHz to save $300 and paying $800 for 333 MHz both sound like bad deals. On another note, it does seem like a good...
Posted by alexkan, on Aug 13, 2006 at 01:42 AM, in Team MacNN
Soooo...is anyone thinking of getting a Mac Pro... 131,816 Views / 1,309 Replies  
Soooo...is anyone thinking of getting a Mac Pro anytime in the near future? :)
Posted by alexkan, on Aug 10, 2006 at 03:28 AM, in Team MacNN
Unfortunately, I wasn't on the Mac Pros for long... 131,816 Views / 1,309 Replies  
Unfortunately, I wasn't on the Mac Pros for long enough each time to test performance on long WUs, but from a preliminary examination, these machines are fast! (Incidentally, the Mac Pros also...
Posted by alexkan, on Aug 8, 2006 at 11:52 PM, in Team MacNN
I don't recall if I've released a Universal... 131,816 Views / 1,309 Replies  
I don't recall if I've released a Universal version of fft_test, but it doesn't help much and it's not really worth the trouble (since you'd have to edit app_info.xml to get SETI to actually use your...
Posted by alexkan, on Aug 8, 2006 at 02:40 AM, in Team MacNN
No need to contact me about testing anymore--I've... 765 Views / 4 Replies  
No need to contact me about testing anymore--I've released v6.1 into the wild. Check the Enhanced Optimized thread (http://forums.macnn.com/showthread.php?p=3074008#post3074008) for the link!
Posted by alexkan, on Aug 3, 2006 at 11:55 PM, in Team MacNN
Alright, I'm done testing what I've got to make... 131,816 Views / 1,309 Replies  
Alright, I'm done testing what I've got to make sure it's solid. (What an inopportune time for the SETI servers to start having validation issues!)

Core Duo v6.1...
Posted by alexkan, on Aug 3, 2006 at 11:52 PM, in Team MacNN
Oh, I've still got a few things up my sleeve for... 131,816 Views / 1,309 Replies  
Oh, I've still got a few things up my sleeve for PowerPC. Can't promise how much they'll help, though...
Posted by alexkan, on Jul 30, 2006 at 10:36 AM, in Team MacNN
I am in the process of testing an optimized... 131,816 Views / 1,309 Replies  
I am in the process of testing an optimized cruncher for Intel Macs. It uses SSE3, so no guarantees that it'll run on Developer Transition Kits, but it will run on every Intel Mac that Apple has...
Posted by alexkan, on Jul 29, 2006 at 11:15 PM, in Team MacNN
I'm in the process of rolling some Intel binaries... 765 Views / 4 Replies  
I'm in the process of rolling some Intel binaries from the codebase I'm using for my PowerPC crunchers. However, I still need to put in assembly optimizations, and without an Intel Mac to test and...
Posted by alexkan, on Jul 23, 2006 at 11:51 AM, in Team MacNN
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