Turbostat: use MSR_IA32_TSC instead of rdtsc

diff --git a/src/turbostat.c b/src/turbostat.c
index aef6628..6466d5c 100644 (file)
--- a/src/turbostat.c
+++ b/src/turbostat.c
@@ -197,6 +197,7 @@ enum return_values {
        ERR_MSR_PKG_PERF_STATUS,
        ERR_MSR_DRAM_PERF_STATUS,
        ERR_MSR_IA32_PACKAGE_THERM_STATUS,
+       ERR_MSR_IA32_TSC,
        ERR_CPU_NOT_PRESENT,
        ERR_NO_MSR,
        ERR_CANT_OPEN_FILE,
@@ -409,17 +410,6 @@ delta_cpu(struct thread_data *t, struct core_data *c,
        return 0;
 }
 
-static unsigned long long
-rdtsc(void)
-{
-       unsigned int low, high;
-
-       asm volatile("rdtsc" : "=a" (low), "=d" (high));
-
-       return low | ((unsigned long long)high) << 32;
-}
-
-
 /*
  * get_counters(...)
  * migrate to cpu
@@ -436,7 +426,8 @@ get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
                return -ERR_CPU_MIGRATE;
        }
 
-       t->tsc = rdtsc();       /* we are running on local CPU of interest */
+       if (get_msr(cpu, MSR_IA32_TSC, &t->tsc))
+               return -MSR_IA32_TSC;
 
        if (get_msr(cpu, MSR_IA32_APERF, &t->aperf))
                return -ERR_MSR_IA32_APERF;