On Dec 3, 2004, at 4:36 PM, Suresh Thalamati wrote:
It would be great if some one can run this test on other platforms and post the results to the list.
AIX 5.2, IBM JDK 1.4.2, 1 GHz Power4, only marginal differences in times. full results:
(Buffer-Size(K) | Alligned Write(msec) |NonAlligned Write(msec))
512 | 15.3046875 | 15.9609375 256 | 10.7109375 | 11.578125 128 | 8.328125 | 8.640625 64 | 7.234375 | 7.4296875 32 | 6.59375 | 6.78125 16 | 6.328125 | 6.4921875 12 | 6.3515625 | 6.40625 10 | 6.3125 | 6.359375 8 | 6.1875 | 6.359375 6 | 6.2421875 | 6.3125 4 | 6.1171875 | 6.265625 2 | 6.078125 | 6.2109375 1 | 6.0703125 | 6.171875
Solaris 9, Sun JDK 1.4.2_03, Sparc II class CPU of unknown speed, significant increase in speed for certain values, esp. 4, 8, 16. full results:
512 | 578.3046875 | 586.796875 256 | 289.1171875 | 297.1484375 128 | 144.1875 | 153.21875 64 | 72.09375 | 81.3359375 32 | 36.0859375 | 44.6171875 16 | 18.046875 | 26.7109375 12 | 17.7265625 | 22.09375 10 | 18.1484375 | 19.8046875 8 | 9.1953125 | 17.59375 6 | 13.0546875 | 15.25 4 | 8.7265625 | 13.171875 2 | 8.5625 | 10.7578125 1 | 8.4765625 | 9.6484375
And just for fun, Mac OS X 10.3.5, JDK 1.4.2, rwd mode (not rws, of course), 466 Mhz G4, aligned writes faster in most cases, sometimes by a large margin, except at 512 block size, where there is a significant performance penalty. full results:
512 | 70.5859375 | 42.453125 256 | 9.8203125 | 22.1328125 128 | 3.6953125 | 7.0390625 64 | 1.28125 | 4.28125 32 | 0.3515625 | 1.8828125 16 | 0.1171875 | 0.109375 12 | 0.09375 | 0.1015625 10 | 0.0703125 | 0.078125 8 | 0.0546875 | 0.0625 6 | 0.2265625 | 0.046875 4 | 0.03125 | 0.0390625 2 | 0.03125 | 0.03125 1 | 0.03125 | 0.0234375
andrew
