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Admiral Gloval Send message Joined: 31 Mar 13 Posts: 20332 Credit: 5,308,449 RAC: 0 |
Gosh Admiral, I admire your patience and tenacity. I do them 4 at a whack. I have 4 coming into their last 24 hour stretch. Then back to Seti very shorts. |
JBird Send message Joined: 3 Sep 02 Posts: 297 Credit: 325,260,309 RAC: 549 |
So interesting. I suppose at 12,500+ credits/per x 4, it might be considered worth it; with a quad core, you're forced to suspend SETI then I presume. It must be pretty intensive stuff. Do they even have GPU versions? I noticed your OpenCL 2.0 spec in your Bonaire - I'd think that would enhance ops. BTW have you tried/considered Lunatics at SETI? They sure have cut my runtimes down. |
Darth Beaver Send message Joined: 20 Aug 99 Posts: 6728 Credit: 21,443,075 RAC: 3 |
jbird i just looked at my results if your talking about the one AP that ran for 36,000 seconds that is a CPU units and they allways run about that long . I don't know much about what Instuction sets are in the AMD but even if they are using some Intel pieces then you can bet picking and choosing bits of code don't always work the way they think it will. Someone said the FX is realy only a 4 core chip as it only has 1 mathcoproccesor or something like that . When i bought it the box says 8 cores and 8 threads so if you have only used Intel you would think there is 16 cores that show up in your task man but with the FX chip you only get 8 not 16 so i Think AMD are playing with words here it's a 4 cored chip with hyperthread so you get 8 , but with copywright , patents and skit they can't have it the same as Intel. |
OzzFan Send message Joined: 9 Apr 02 Posts: 15691 Credit: 84,761,841 RAC: 28 |
To clarify, Intel's Hyperthreading makes one ALU/FPU pair appear to the OS and all software as two ALUs and FPUs. AMD's chips pair two ALUs with a single FPU. So if an AMD FX chip says it is 8 cores, it has 4 FPUs - but that's only for recent models. Phenom II and older chips all have a 1:1 ratio of ALU to FPU. In most cases, the reduced FPU count doesn't affect much. But for math intensive programs like SETI crunching, it does hamper processing just a bit. However, with the CPU acting as nothing more than a feeder for powerful GPUs these days, it doesn't really seem to matter much even then. |
Darth Beaver Send message Joined: 20 Aug 99 Posts: 6728 Credit: 21,443,075 RAC: 3 |
Jbird i run 1 units per Cpu core and depending weather it a AP or MB units i have i use 7 Cpu cores for MB's and 4 for AP's The GPU's do 2 units per GPU no matter weather there MB or AP i have a RAC of approx 25-30,000 doing just AP's and a RAC of approx 15-18,000 doing just MB When doing AP's on the GPU's i only use 4 of the CPU cores there by leaving 4 cores to feed the 4 units being done on the GPU's With the never version of the Seti Client i can leave only 2 CPU cores free to feed the GPU's however i have not run it long enough in that confog to get a good idea weather it's worth it |
JBird Send message Joined: 3 Sep 02 Posts: 297 Credit: 325,260,309 RAC: 549 |
Stderr from the task = Build features: Non-graphics BLANKIT TWINDECHIRP USE_LRINT FFTW USE_INCREASED_PRECISION USE_AVX x64 CPUID: AMD FX(tm)-8350 Eight-Core Processor Cache: L1=64K L2=2048K CPU features: FPU TSC PAE CMPXCHG8B APIC SYSENTER MTRR CMOV/CCMP MMX FXSAVE/FXRSTOR SSE SSE2 HT SSE3 SSSE3 FMA3 SSE4.1 SSE4.2 AVX SSE4A XOP FMA4 = Your chip is definitely a true 8 core with 8 Threads and AVX x64 (bit) = Intel getting ready to launch it's first true 8 core and they're $1000 bucks! Up til now their 8 core "rated" CPU only had 4 cores +4 logical I'd sure look into a cmdline for CPU APs - bet it would cut runtime in half |
Admiral Gloval Send message Joined: 31 Mar 13 Posts: 20332 Credit: 5,308,449 RAC: 0 |
So interesting. I suppose at 12,500+ credits/per x 4, it might be considered worth it; with a quad core, you're forced to suspend SETI then I presume. A couple of versions ago. I was running both at the same time. I was letting boinc handle the time sharing management. It would go between projects running one then switch to the other giving it CPU time. Right now after I installed the GPU. It is running SETI GPU MB wu on the GPU and Climate Prediction on the CPU. Don't know if they have GPU versions of Climate Prediction. As for Lunatics. I'm scratching my head. Not sure how and where to go with it. |
Darth Beaver Send message Joined: 20 Aug 99 Posts: 6728 Credit: 21,443,075 RAC: 3 |
I'd sure look into a cmdline for CPU APs - bet it would cut runtime in half I'm happy it's plenty fast enough . Command line versions mmmmm I'm a bit lazy . If i kick the other machine on it will give me another 8,000 + to the Rac but at 6 mill i'm happy |
Darth Beaver Send message Joined: 20 Aug 99 Posts: 6728 Credit: 21,443,075 RAC: 3 |
Stderr from the task At the moment I am doing mainly MB's so i have it set to use 7 of the 8 cores . While still doing 4 units on the GPU a total of 11 units . This unit was probably being done with these settings . When doing Ap's i can not have this many Cpu cores working i would need to drop it to 6 Cpu cores and i probably didn't When they finally get around to fixing the Ap data base and there are more units i'll change it to only Ap's. I'm doing something else as well |
OzzFan Send message Joined: 9 Apr 02 Posts: 15691 Credit: 84,761,841 RAC: 28 |
CPU features: FPU TSC PAE CMPXCHG8B APIC SYSENTER MTRR CMOV/CCMP MMX FXSAVE/FXRSTOR SSE SSE2 HT SSE3 SSSE3 FMA3 SSE4.1 SSE4.2 AVX SSE4A XOP FMA4 Be careful with the wording there. The part where it says "Your chip is definitely a true 8 core with 8 threads..." is in reference to not using virtual cores with Hyperthreading. Your AMD FX83xx series CPU still has only 4 FPU "cores" - each ALU shares an FPU. And while that chip may be cheaper than the Intels, you're paying more per watt over the course of a year due to higher electricity usage. Mind you, I'm just giving you the facts. I'm not an Intel or AMD fanboy (even though I currently use mostly Intel). I'm just a general nerd for the entire x86 market. :-) |
HAL9000 Send message Joined: 11 Sep 99 Posts: 6534 Credit: 196,805,888 RAC: 57 |
CPU features: FPU TSC PAE CMPXCHG8B APIC SYSENTER MTRR CMOV/CCMP MMX FXSAVE/FXRSTOR SSE SSE2 HT SSE3 SSSE3 FMA3 SSE4.1 SSE4.2 AVX SSE4A XOP FMA4 I would also point out Intel has been selling CPUs with 8c/16t since 2010 & the 8c/8t Atom was released in 2013 for < $200. SETI@home classic workunits: 93,865 CPU time: 863,447 hours Join the [url=http://tinyurl.com/8y46zvu]BP6/VP6 User Group[ |
JBird Send message Joined: 3 Sep 02 Posts: 297 Credit: 325,260,309 RAC: 549 |
Apologies! I stand corrected/modified. And thanks for the comparative details/definitions. Meant no harm. Live and learn! I did parrot the "...first true 8 core/$1000..." piece from an ad at Newegg, whilst shopping for my own next upgrades, recently : = Codename: Haswell-E First Intel 8-Core Desktop Processor New Intel® Core™ i7 Processors on LGA 2011-v3 socket Support for 8-core and 6-core options New Intel® X99 Chipset with upgraded I/O capabilities First desktop platform to support DDR4 memory Ultimate Platform for Multi-Thread Computing Up to 79% more multi-thread performance1over 4 Core Platform Massive 16-thread performance and quad-channel memory for content creation and multi-tasking = The "virtual" stuff that exists in the wafer world via lithography is just a boggle to me. Just tryin to keep up! = "I'm just a general nerd for the entire x86 market. :-)" Ya me too! @ OzzFan = And - "I would also point out Intel has been selling CPUs with 8c/16t since 2010 & the 8c/8t Atom was released in 2013 for < $200." Surely, the 8c/16t isn't a mainstream, consumer "Desktop processor" you refer to HAL -- ie mebe a Server class or CAD Workstation Xeon product? |
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