diff options
Diffstat (limited to 'kvm/test/x86/tsc.c')
-rw-r--r-- | kvm/test/x86/tsc.c | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/kvm/test/x86/tsc.c b/kvm/test/x86/tsc.c deleted file mode 100644 index 394a9c6b8..000000000 --- a/kvm/test/x86/tsc.c +++ /dev/null @@ -1,38 +0,0 @@ -#include "libcflat.h" - -u64 rdtsc(void) -{ - unsigned a, d; - - asm volatile("rdtsc" : "=a"(a), "=d"(d)); - return a | (u64)d << 32; -} - -void wrtsc(u64 tsc) -{ - unsigned a = tsc, d = tsc >> 32; - - asm volatile("wrmsr" : : "a"(a), "d"(d), "c"(0x10)); -} - -void test_wrtsc(u64 t1) -{ - u64 t2; - - wrtsc(t1); - t2 = rdtsc(); - printf("rdtsc after wrtsc(%lld): %lld\n", t1, t2); -} - -int main() -{ - u64 t1, t2; - - t1 = rdtsc(); - t2 = rdtsc(); - printf("rdtsc latency %lld\n", (unsigned)(t2 - t1)); - - test_wrtsc(0); - test_wrtsc(100000000000ull); - return 0; -} |