Daniel John Debrunner wrote: > > >>It would be great if some one can run this test on other platforms and > >>post the results to the list. > > > On Suse Linux, with an old Dell machine (2cpu 733Mhz Pentium) I see no > real difference between aligned and non-aligned writes. > I used Sun's 1.4.2 & 1.5.0 and IBM's 1.4.2 vms > > Dan.
I also ran on linux, there does not seem to be any major difference between aligned vs non-aligned. FYI: OS: suse linux ( 2.4.21-202-smp4G) cpu : 2 731 MHZ pentium III processors memory: 256 MB disk: SCSI 10600 rpm (Tagged Queuing enabled) file system: reiserfs (rw) JVM:Classic VM (build 1.4.2, J2RE 1.4.2 IBM build cxia32142-20040926 (JIT enable d: jitc)) write cache enabled: NO (Buffer-Size(K) | Alligned Write(msec) |NonAlligned Write(msec)) | gain % 512 | 47.3818359375 | 49.673828125 | 4.837280240730436% 256 | 35.9814453125 | 37.6083984375 | 4.521644727914236% 128 | 28.541015625 | 35.5166015625 | 24.44056661876411% 64 | 27.0712890625 | 26.033203125 | -3.8346380000721467% 32 | 25.2734375 | 25.2626953125 | -0.042503863987633395% 16 | 24.853515625 | 24.9521484375 | 0.3968565815324183% 12 | 24.6181640625 | 24.7978515625 | 0.7298980522829197% 10 | 24.9287109375 | 25.6162109375 | 2.757864222196106% 8 | 24.677734375 | 24.6181640625 | -0.2413929560743965% 6 | 24.591796875 | 24.7333984375 | 0.5758081169089032% 4 | 24.51171875 | 24.654296875 | 0.5816733067729084% 2 | 24.4208984375 | 24.548828125 | 0.5238533210701004% 1 | 24.466796875 | 24.490234375 | 0.09579308693222639% Thanks -suresht
