Kernel: 2.4.13-pre5
Tests: mmap001 and mtest01 from Linux Test Project. Listen to mp3blaster.
Summary:
mmap001 wall clock time higher than 2.4.13-ac3-vmpatch-freeswap and 2.4.13-pre3aa1.
mtest01 terminated with signals 2 and 3, CPU utilization ~ 100% on first run.
Second try had much longer wall clock times than other kernels.
mp3blaster not too pleasant.
Average for 5 mmap001 runs
bytes allocated: 2048000000
User time (seconds): 19.558
System time (seconds): 19.800
Elapsed (wall clock seconds) time: 262.80
Percent of CPU this job got: 14.60
Major (requiring I/O) page faults: 500213.0
Minor (reclaiming a frame) faults: 40.6
Comparison for mmap001 test:
2.4.12-ac3-vmpatch-freeswap Elapsed (wall clock seconds) time: 152.87
2.4.13-pre3aa1 Elapsed (wall clock seconds) time: 204.09
2.4.13-pre3aa1 page-cluster=2 Elapsed (wall clock seconds) time: 213.90
2.4.13-pre3aa1 page-cluster=4 Elapsed (wall clock seconds) time: 209.41
2.4.13-pre3aa1 page-cluster=6 Elapsed (wall clock seconds) time: 206.08
2.4.13-pre5 Elapsed (wall clock seconds) time: 262.80
mtest01
The first time I ran this test, it went much longer than expected.
Five tests terminated with signal 2, and five terminated with signal 3.
That was odd because I run the same script with the same basically the
same processes running each time.
I re-ran the test a second time (only 3 iterations).
Averages for 3 mtest01 runs
bytes allocated: 1249902592
User time (seconds): 2.143
System time (seconds): 4.600
Elapsed (wall clock) time: 153.333
Percent of CPU this job got: 4.00
Major (requiring I/O) page faults: 164.3
Minor (reclaiming a frame) faults: 305953.3
Comparison for mtest01:
2.4.12-ac3 page-cluster=2 Elapsed (wall clock) time: 36.066
2.4.12-ac3 page-cluster=4 Elapsed (wall clock) time: 34.777
2.4.13-pre3aa1 page-cluster=2 Elapsed (wall clock) time: 47.878
Only 2.4.13-pre3aa1 page-cluster=2 sounds good in mp3blaster throughout the test.
mmap001test scripty
#!/bin/bash
# script to exercise mmap.
#
# Uses "mmap001" test from Linux Test Project
#
# see: http://ltp.sourceforge.net/
#
PATH="$PATH:/usr/src/sources/l/cvs/ltp/testcases/bin"
# mmap, touch, msync, and munmap pages
test=mmap001
pages=500000
args="-m $pages"
test_log=${test}-`uname -r`.log
vmstat_log=vmstat-${test}-`uname -r`.log
# iterations
typeset -i i=5
# watch memory usage every second
vmstat 1 > $vmstat_log &
echo running $i iterations of $test $args
echo "output is going to $test_log and $vmstat_log"
# need full featured bash for (( arith )).
while ((i > 0))
do /usr/bin/time -v $test $args
((i--))
done > $test_log 2>&1
# kill vmstat
kill $!
--
Randy Hron