On 5 April 2016 at 13:57, Lluís Vilanova <vilan...@ac.upc.edu> wrote: > Emilio G Cota writes: > >> I'm assuming windows compilers don't support this attribute. >> Signed-off-by: Emilio G. Cota <c...@braap.org> >> --- >> include/qemu/compiler.h | 10 ++++++++++ >> 1 file changed, 10 insertions(+) > >> diff --git a/include/qemu/compiler.h b/include/qemu/compiler.h >> index 8f1cc7b..fb946f1 100644 >> --- a/include/qemu/compiler.h >> +++ b/include/qemu/compiler.h >> @@ -41,6 +41,16 @@ >> # define QEMU_PACKED __attribute__((packed)) >> #endif > >> +#define QEMU_CACHELINE (64) > [...] > > You should make this a value taken from configure. In linux you could use > something like: > > getconf LEVEL1_DCACHE_LINESIZE > > Or an equivalent program using sysconf(3) if getconf is not present.
The cache line size at compile time is not necessarily the cache line size at runtime... thanks -- PMM
