I have released a new experimental version of Bonnie++ that includes a program to test per-char IO using putc()/getc(), putc()/getc() when linked in a non-threaded way (significantly improves performance) putc_unlocked()/getc_unlocked(), and write()/read().
Here's the results of testing my Thinkpad T20 with P3-650: Version 1.93 write read putcNT getcNT putc getc putcU getcU lyta 142 651 8189 9348 1763 1813 22174 44887 lyta,142,651,8189,9348,1763,1813,22174,44887 Here's the results of testing my Athlon 800 play machine: Version 1.93 write read putcNT getcNT putc getc putcU getcU test 146 607 7356 7280 1834 1971 41995 59100 test,146,607,7356,7280,1834,1971,41995,59100 Both machines run ReiserFS. A quick test indicates that using Ext2 instead of ReiserFS triples the performance of write(fd, buf, 1), but this is something I already knew (and had mentioned before on the ReiserFS list). Also based on previous tests I expect Solaris to outperform Linux with glibc on putcNT, getcNT, putc, and getc. The regular performance of putc() on Solaris comes close to putc_unlocked() on Linux with glibc. I'd like to thank Andrew Morton for forwarding messages from L-K that provoked me to write this new test program. I was tempted to subscribe to L-K to join this discussion, but it seems that Linus is saying everything that needs to be said anyway so there's no point. ;) -- http://www.coker.com.au/bonnie++/ Bonnie++ hard drive benchmark http://www.coker.com.au/postal/ Postal SMTP/POP benchmark http://www.coker.com.au/projects.html Projects I am working on http://www.coker.com.au/~russell/ My home page
