Hello, I just pushed some changes to the new "x86-common" branch in hwloc's git. You should be able to use it from the Xen component with:
hwloc_x86_discovery(topology, nbprocs /* total number of PUs */, HWLOC_X86_DISC_FLAG_CPUINFO|HWLOC_X86_DISC_FLAG_CACHES, func, data); func must be something like: static int hwloc_x86_xen_cpuid(void *data, unsigned pu, unsigned *eax, unsigned *ebx, unsigned *ecx, unsigned *edx) { /* PU is the physical PU number */ } data will likely be the Xen handle. Brice Le 01/02/2014 11:24, Brice Goglin a écrit : > Le 29/01/2014 18:47, Andrew Cooper a écrit : >> This would be nice, although it would involve some more selection on the >> exclusions. Currently, running Xen excludes all other cpu detection >> methods as they are more likely than not to be wrong. >> >> One solution to this would be to have a "generic" x86 cpuid topology >> generator which must be parametrised with a structure, at which point >> both Xen and the fallback x86 methods can supply appropriate function >> pointers. >> >> This would allow Xen to use the generic topology code while still >> preventing fallback to the x86 topology detection method. > Right, that'd work better, and the code would be nicer. > I'll look at this. > > Brice > > _______________________________________________ > hwloc-devel mailing list > hwloc-de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-devel