Rene Herman wrote: > On 12-12-07 00:55, Nigel Cunningham wrote: > >> (AMD 1.8GHz Turion, running at 800MHz. ATI RS480 - Mitac 8350 mobo) >> >> [EMAIL PROTECTED]:~/Downloads$ gcc port80.c -o port80 >> [EMAIL PROTECTED]:~/Downloads$ sudo ./port80 >> cycles: out 1235, in 1207 > > Looking good. > >> [EMAIL PROTECTED]:~/Downloads$ gcc -O2 port80.c -o port80 >> [EMAIL PROTECTED]:~/Downloads$ sudo ./port80 >> cycles: out 1844674407370794, in 1844674407369408 > > Obviously not. I suppose this changes with -m32 on the GCC command line? > (sorry for missing that, I have no 64-bit machines).
Yes, it does: [EMAIL PROTECTED]:~/Downloads$ gcc -m32 -o port80 port80.c [EMAIL PROTECTED]:~/Downloads$ sudo ./port80 cycles: out 1231, in 1208 [EMAIL PROTECTED]:~/Downloads$ sudo ./port80 cycles: out 1233, in 1210 Incidentally: [EMAIL PROTECTED]:~/Downloads$ processor_speed (A little script I made because my lappy does a solid lock every now and then that seems to be cpu-freq related - locking it to one frequency makes the lock far less common). Speed is now 1800000. [EMAIL PROTECTED]:~/Downloads$ sudo ./port80 cycles: out 2472, in 2505 [EMAIL PROTECTED]:~/Downloads$ sudo ./port80 cycles: out 2489, in 2515 [EMAIL PROTECTED]:~/Downloads$ sudo ./port80 cycles: out 2481, in 2503 [EMAIL PROTECTED]:~/Downloads$ sudo ./port80 cycles: out 2476, in 2507 So the same effect Maxim reported is seen here. Regards, Nigel -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
