Re: VM tests on 2.4.15-pre6 and 2.4.15pre6aa1

[rwhron@earthlink.net]

On Mon, Nov 19, 2001 at 01:23:12AM +0100, Andrea Arcangeli wrote:
> 
> 	echo 9 >/proc/sys/vm/vm_mapped_ratio
> 
> and also after backing out those two patches in order:
> 
> 	ftp://ftp.us.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4/2.4.15pre6aa1/10_vm-14-no-anonlru-1-simple-cache-1
> 	ftp://ftp.us.kernel.org/pub/linux/kernel/people/andrea/kernels/v2.4/2.4.15pre6aa1/10_vm-14-no-anonlru-1
> 
> and again using "echo 9 >/proc/sys/vm/vm_mapped_ratio" after backing out
> the two patches.
> 
> thanks for the feedback,

Andrea,

Changing vm_mapped_ratio from 50 to 9 improved the time on the mmap001 
test by 11%.  

Backing out the 2 patches and changing vm_mapped_ratio to 9 improved the 
time on the memfill tests by 28% and improved mp3 playtime as well. :)  

2.4.15-pre6-vm_scan_rate=9
--------------------------

played 360 seconds of mp3 in 453 second test (79%)

Averages for 10 mtest01 runs
bytes allocated:                    1665138688
User time (seconds):                7.605
System time (seconds):              3.139
Elapsed (wall clock) time:          45.214
Percent of CPU this job got:        23.30
Major (requiring I/O) page faults:  144.6
Minor (reclaiming a frame) faults:  407313.4

played 808 seconds of mp3 in 813 second test (99%)

Average for 5 mmap001 runs
bytes allocated:                    2048000000
User time (seconds):                3.530
System time (seconds):              23.138
Elapsed (wall clock seconds) time:  162.60
Percent of CPU this job got:        15.80
Major (requiring I/O) page faults:  500191.8
Minor (reclaiming a frame) faults:  30.2

2.4.15-pre6-vm_scan_rate=9
without: 10_vm-14-no-anonlru-1-simple-cache-1 10_vm-14-no-anonlru-1
--------------------------

played 318 seconds of mp3 in 356 second test (89%)

Averages for 10 mtest01 runs
bytes allocated:                    1668179558
User time (seconds):                7.672
System time (seconds):              3.322
Elapsed (wall clock) time:          35.637
Percent of CPU this job got:        30.50
Major (requiring I/O) page faults:  154.4
Minor (reclaiming a frame) faults:  408058.2

played 796 seconds of mp3 in 806 second test (99%)

Average for 5 mmap001 runs
bytes allocated:                    2048000000
User time (seconds):                3.402
System time (seconds):              23.298
Elapsed (wall clock seconds) time:  161.46
Percent of CPU this job got:        15.80
Major (requiring I/O) page faults:  500190.4
Minor (reclaiming a frame) faults:  31.6

-- 
Randy Hron