| 1 |
On Mittwoch, 11. Juli 2007, Thanasis wrote: |
| 2 |
> on 07/11/2007 08:20 PM Hemmann, Volker Armin wrote the following: |
| 3 |
> >> I don't see _any_such_flags_ in /etc/make.conf.example. |
| 4 |
> >> I use: |
| 5 |
> >> CFLAGS="-march=k8 -fomit-frame-pointer -pipe -O2" |
| 6 |
> >> CXXFLAGS="${CFLAGS}" |
| 7 |
> >> |
| 8 |
> >> System: notebook AMILO Xa 1526 with AMD Turion(tm) 64 X2 Mobile |
| 9 |
> >> Technology TL-56 |
| 10 |
> >> |
| 11 |
> >> Am I missing something? |
| 12 |
> > |
| 13 |
> > if you have 'pni' in /proc/cpuinfo you should add -msse3. |
| 14 |
> > -fomit-frame-pointer is useless/not needed on amd64-. |
| 15 |
> |
| 16 |
> I do. |
| 17 |
> |
| 18 |
> # cat /proc/cpuinfo |
| 19 |
> processor : 0 |
| 20 |
> vendor_id : AuthenticAMD |
| 21 |
> cpu family : 15 |
| 22 |
> model : 72 |
| 23 |
> model name : AMD Turion(tm) 64 X2 Mobile Technology TL-56 |
| 24 |
> stepping : 2 |
| 25 |
> cpu MHz : 800.000 |
| 26 |
> cache size : 512 KB |
| 27 |
> physical id : 0 |
| 28 |
> siblings : 2 |
| 29 |
> core id : 0 |
| 30 |
> cpu cores : 2 |
| 31 |
> fpu : yes |
| 32 |
> fpu_exception : yes |
| 33 |
> cpuid level : 1 |
| 34 |
> wp : yes |
| 35 |
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge |
| 36 |
> mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext |
| 37 |
> fxsr_opt rdtscp lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm |
| 38 |
> cr8_legacy bogomips : 3611.22 |
| 39 |
> TLB size : 1024 4K pages |
| 40 |
> clflush size : 64 |
| 41 |
> cache_alignment : 64 |
| 42 |
> address sizes : 40 bits physical, 48 bits virtual |
| 43 |
> power management: ts fid vid ttp tm stc |
| 44 |
> |
| 45 |
> processor : 1 |
| 46 |
> vendor_id : AuthenticAMD |
| 47 |
> cpu family : 15 |
| 48 |
> model : 72 |
| 49 |
> model name : AMD Turion(tm) 64 X2 Mobile Technology TL-56 |
| 50 |
> stepping : 2 |
| 51 |
> cpu MHz : 800.000 |
| 52 |
> cache size : 512 KB |
| 53 |
> physical id : 0 |
| 54 |
> siblings : 2 |
| 55 |
> core id : 1 |
| 56 |
> cpu cores : 2 |
| 57 |
> fpu : yes |
| 58 |
> fpu_exception : yes |
| 59 |
> cpuid level : 1 |
| 60 |
> wp : yes |
| 61 |
> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge |
| 62 |
> mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext |
| 63 |
> fxsr_opt rdtscp lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm |
| 64 |
> cr8_legacy bogomips : 1603.39 |
| 65 |
> TLB size : 1024 4K pages |
| 66 |
> clflush size : 64 |
| 67 |
> cache_alignment : 64 |
| 68 |
> address sizes : 40 bits physical, 48 bits virtual |
| 69 |
> power management: ts fid vid ttp tm stc |
| 70 |
> |
| 71 |
> *PS: |
| 72 |
> 1) Should I add any other flags also, besides adding -msse3 |
| 73 |
> (CFLAGS="-march=k8 -msse3 -pipe -O2") |
| 74 |
|
| 75 |
no. I experimented a lot with different flags in the past - and if there are |
| 76 |
differences they are so small that I missed them. When chasing bugs I had to |
| 77 |
recompile everything with safe flags, and nothing changed. Maybe the system |
| 78 |
is a little bit more stable now... |
| 79 |
|
| 80 |
|
| 81 |
> 2) Just curious: Why is there such a big difference between the 2 CPUs' |
| 82 |
> bogomips values reported? |
| 83 |
|
| 84 |
I really don't know ;) |
| 85 |
-- |
| 86 |
gentoo-amd64@g.o mailing list |
Archives