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Computation Error With Optimized Apps
Lysia:
Had Memtest running last night (about 10 hours), no errors detected.
And http://setiathome.berkeley.edu/workunit.php?wuid=417591604 is finished, found 30 single pulses and is inconclusive.
--- Quote from: sunu on 27 Mar 2009, 09:56:22 am ---Nevertheless if you want to test the stability of your machine run prime95 ( http://www.mersenne.org/freesoft ) for at least 8h (some like to run at least 24h).
--- End quote ---
Running right now.
--- Quote from: sunu on 27 Mar 2009, 09:56:22 am ---T2300 should support sse3. You can gain a slight increase in computation speed switching from sse2 to sse3 app.
--- End quote ---
That's the information in Wikipedia and intels datasheet, but /proc/cpuinfo just tells me
--- Code: ---flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon bts pni monitor est tm2 xtpr pdcm
--- End code ---
I guess the "ss" should be sse3 or ssse3
sunu:
--- Quote from: Lysius on 28 Mar 2009, 09:35:27 pm ---That's the information in Wikipedia and intels datasheet, but /proc/cpuinfo just tells me
--- Code: ---flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon bts pni monitor est tm2 xtpr pdcm
--- End code ---
I guess the "ss" should be sse3 or ssse3
--- End quote ---
nx is sse3.
Josef W. Segur:
--- Quote from: Lysius on 28 Mar 2009, 09:35:27 pm ---That's the information in Wikipedia and intels datasheet, but /proc/cpuinfo just tells me
--- Code: ---flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon bts pni monitor est tm2 xtpr pdcm
--- End code ---
I guess the "ss" should be sse3 or ssse3
--- End quote ---
--- Quote from: sunu on 28 Mar 2009, 10:32:36 pm ---nx is sse3.
--- End quote ---
I disagree. SSE3 was originally called Prescott New Instructions, and is shown as pni in that list (Windows Vista may also use the pni code). The nx code means an execution protection mechanism which allows marking memory regions for data only, not executable instructions. Early Prescott chips didn't have nx but obviously did have pni/SSE3, early AMD Athlon 64 chips had nx but not SSE3.
Joe
sunu:
--- Quote from: Josef W. Segur on 29 Mar 2009, 12:26:44 am ---I disagree. SSE3 was originally called Prescott New Instructions, and is shown as pni in that list (Windows Vista may also use the pni code). The nx code means an execution protection mechanism which allows marking memory regions for data only, not executable instructions. Early Prescott chips didn't have nx but obviously did have pni/SSE3, early AMD Athlon 64 chips had nx but not SSE3.
Joe
--- End quote ---
I stand corrected. :)
Lysia:
mprime didn't find any problem in 20 hours, my system seems fine. What's left is a buggy app or there is a bug in the CPU that is triggered by an instruction which is used in the optimized AP but not in mprime.
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