On three different systems, the cpuinfo.sh is passing the wrong FLAGS to the make file. For this CPU - cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz stepping : 6 cpu MHz : 2999.718 cache size : 6144 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr sse4_1 lahf_lm bogomips : 6002.46 clflush size : 64
---------- other core muted --------------- With gcc 4.3.3 and 4.2.3 passing --build/host=i686 these flags are written - -march=i686 -mcpu=i686. -mcpu is no longer used. Same cpu with gcc and no --build/host being passed -march=nocona -mtune=nocona <--------- These are for 64bit systems only. I'm using 32bit. Should be prescott or core2 for gcc 4.3+ For this CPU - processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : 44 model name : AMD Sempron(tm) Processor 3000+ stepping : 2 cpu MHz : 1808.082 cache size : 128 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext fxsr_opt lm 3dnowext 3dnow up pni bogomips : 3616.16 clflush size : 64 Same gcc's with no --build/host -march=k8 -mtune=k8 <----- might be ok. -march=athlon-xp -msse3 is what I've found to give the best results. With --build/host=i686 -march=i686 -mcpu=i686 <--------- wrong. I've been using sed to edit the make for for some time now (pre .rc2) It is still happening in 1.9.0. ------------------------------------------------------------------------------ Register Now & Save for Velocity, the Web Performance & Operations Conference from O'Reilly Media. Velocity features a full day of expert-led, hands-on workshops and two days of sessions from industry leaders in dedicated Performance & Operations tracks. Use code vel09scf and Save an extra 15% before 5/3. http://p.sf.net/sfu/velocityconf _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
