On Sun, Nov 28, 2004 at 09:36:45PM -0500, Jeff Johnson wrote: >And it also shouldn't surprise that there are indeed instructions that have >crept into various packages that preven execution on i386, rdtsc in rpm (so I >don't have to stare at gettimeofday in straces) comes to mind. Hopefully you're checking the cpuid feature flags to make sure 'tsc' is there first, and falling back to get_timeofday if not present ? If not, this is horribly broken on.. - lots of 586's. Cyrix, and early AMDs iirc didn't have TSC. - Any CPU with errata making TSC unusable. Winchip C6 was one such beast. (586), there may be others too. - Some NUMA boxes have big problems keeping TSCs in sync, and fall back to alternative timing sources. Come to think of it, why is rpm needing to do this anyway ? Dave
