diff options
Diffstat (limited to 'benchtests/README')
| -rw-r--r-- | benchtests/README | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/benchtests/README b/benchtests/README index 4ddff794d1..aaf0b659e2 100644 --- a/benchtests/README +++ b/benchtests/README @@ -34,6 +34,15 @@ the benchmark to use clock_gettime by invoking make as follows: Again, one must run `make bench-clean' before changing the measurement method. +On x86 processors, RDTSCP instruction provides more precise timing data +than RDTSC instruction. All x86 processors since 2010 support RDTSCP +instruction. One can force the benchmark to use RDTSCP by invoking make +as follows: + + $ make USE_RDTSCP=1 bench + +One must run `make bench-clean' before changing the measurement method. + Running benchmarks on another target: ==================================== |