Hi, > This enables us to share the same page table code for > both radix and hash. Radix use a hardware defined big endian > page table
This is measurably worse (a little over 2% on POWER8) on a futex microbenchmark: #define _GNU_SOURCE #include <unistd.h> #include <sys/syscall.h> #include <linux/futex.h> #define ITERATIONS 10000000 #define futex(A, B, C, D, E, F) syscall(__NR_futex, A, B, C, D, E, F) int main(void) { unsigned long i = ITERATIONS; while (i--) { unsigned int addr = 0; futex(&addr, FUTEX_WAKE, 1, NULL, NULL, 0); } return 0; } Is there any way to avoid the radix tax here? Anton _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev