I finally decided that I needed to take the dreaded plunge to glibc6.
Upon completion, I recompiled Bonnie to see what timing differences
might crop up. The results were pretty disturbing when compared to
libc-45.4.43 performance, so I dug in with strace.
Bottom line: Compiling Bonnie with libc-5.4.43 headers fixed it.
I haven't (yet) started mucking up the headers; thought I'd report
first to see if it's a known/do-this-instead-dummy problem :)
-Mike
Thanks to glibc folks; the move was _remarkably_ easy. Great job!
-----------------------------the poop------------------------------
[root]:# ./Bonnie.libc2.binary.libc2.headers -s 16
File './Bonnie.560', size: 16777216
Writing with putc()...done
Rewriting...done
Writing intelligently...done
Reading with getc()...done
Reading intelligently...done
Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
16 2676 100.0 31959 99.5 10917 100.0 2313 100.0 38822 99.5 4541.0 98.8
strace output:
gettimeofday({886138519, 14624}, NULL) = 0 <0.000032>
getrusage(RUSAGE_SELF, {ru_utime={0, 10000}, ru_stime={0, 10000}, ...})
[root]:# ./Bonnie.libc2.binary.libc1.headers -s 16
File './Bonnie.564', size: 16777216
Writing with putc()...done
Rewriting...done
Writing intelligently...done
Reading with getc()...done
Reading intelligently...done
Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
16 7454 100.1 31938 99.4 10894 99.7 6638 100.1 42337 100.8 691.2 15.0
strace output:
gettimeofday({886138539, 789970}, NULL) = 0 <0.000033>
getrusage(RUSAGE_SELF, {ru_utime={0, 10000}, ru_stime={0, 0}, ...}) = 0
[root]:# ./Bonnie.libc1.binary -s 16
File './Bonnie.571', size: 16777216
Writing with putc()...done
Rewriting...done
Writing intelligently...done
Reading with getc()...done
Reading intelligently...done
Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done...
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU
16 7450 99.6 31908 99.3 10907 99.9 6595 100.2 41850 99.6 695.8 15.1
strace output:
gettimeofday({886138489, 332388}, NULL) = 0 <0.000034>
getrusage(RUSAGE_SELF, {ru_utime={0, 10000}, ru_stime={0, 0}, ...}) = 0