On Tue, 5 Aug 2003, Andrew Morton wrote:
> Solutions to this inaccuracy are to make the test so long-running (ten
> minutes or more) that the difference is minor, or to include the `sync' in
> the time measurement.
And/or reduce RAM at kernel boot, etc. Anyway, I also asked for 'sync'
yesterday and Grant included some but not after every each tests.
I run the results through some scripts to make it more readable.
It indeed has some interesting things ...
reiser4 reiserfs ext3 XFS JFS
copy 33.39,34% 39.55,32% 39.42,25% 43.50,32% 48.15,20%
sync 1.54, 0% 3.15, 1% 9.05, 0% 2.08, 1% 3.05, 1%
recopy1 31.09,34% 75.15,13% 79.96, 9% 102.37,12% 108.39, 5%
recopy2 33.15,33% 77.62,13% 98.84, 7% 108.00,12% 114.96, 5%
sync 2.89, 3% 3.84, 1% 8.15, 0% 2.40, 2% 3.86, 0%
du 2.05,42% 2.46,21% 3.31,11% 3.73,32% 2.42,17%
delete 7.41,52% 5.22,58% 3.71,39% 8.75,56% 15.33, 7%
tar 52.25,25% 90.83,12% 74.93,13% 157.61, 7% 135.86, 6%
sync 6.77, 2% 4.19, 3% 1.67, 1% 0.95, 1% 38.18, 0%
overall 171.28,30% 302.53,16% 319.71,11% 429.79,13% 470.88, 6%
BTW, zsh has a built-in 'time' so measuring a full operation can be
easily done as 'sync; time ( my_test; sync )'
Szaka
