Below are single cpu stream results for an HP ProLiant BL30p, configured as follows: HP ProLiant BL30p 2x3.2GHz/2MB L3 Xeon processors 2GB memory (2x1GB DIMMs) Red Hat 3 Update 3 ------------------------------------------------------------- This system uses 8 bytes per DOUBLE PRECISION word. ------------------------------------------------------------- Array size = 1000000, Offset = 2048 Total memory required = 22.9 MB. Each test is run 100 times, but only the *best* time for each is used. ------------------------------------------------------------- Your clock granularity/precision appears to be 1 microseconds. Each test below will take on the order of 5419 microseconds. (= 5419 clock ticks) Increase the size of the arrays if this shows that you are not getting at least 20 clock ticks per test. ------------------------------------------------------------- WARNING -- The above is only a rough guideline. For best results, please be sure you know the precision of your system timer. ------------------------------------------------------------- Function Rate (MB/s) RMS time Min time Max time Copy: 2463.4338 0.0066 0.0065 0.0075 Scale: 2478.3538 0.0065 0.0065 0.0067 Add: 2112.3344 0.0115 0.0114 0.0116 Triad: 2014.2731 0.0121 0.0119 0.0123