On Wed, 12 May 2010 06:19:29 +0200 Justus Winter <4win...@informatik.uni-hamburg.de> wrote: > And here are the results: > > Benchmarking /home/teythoon/ext2fs.vanilla... > Running 'dd if=/dev/zero of=/mnt/sink bs=1M count=51'... > 2.28 2.27 2.28 2.30 2.30 Average: 2.286 > Running 'tar xf /tmp/ramdisk/hurd_20090404.orig.tar.gz -C /mnt'... > 23.23 23.15 23.26 23.02 23.13 Average: 23.158 > Benchmarking /home/teythoon/ext2fs.sc_unlock... > Running 'dd if=/dev/zero of=/mnt/sink bs=1M count=51'... > 2.32 2.06 2.33 2.09 2.36 Average: 2.232 > Running 'tar xf /tmp/ramdisk/hurd_20090404.orig.tar.gz -C /mnt'... > 23.00 23.15 23.08 22.84 22.73 Average: 22.96 > > If there's anything wrong with my benchmarking method or if you want > me to increase the amount of data written or the number of runs, > please let me know.
Since the performance of my hard drive is of little interest here, I ran the script again, once with the call to sync removed and once with a storeio based ramdisk as backend: Benchmarking /home/teythoon/ext2fs.vanilla... Running 'dd if=/dev/zero of=/mnt/sink bs=1M count=51'... 2.05 2.29 2.07 2.25 2.19 Average: 2.17 Running 'tar xf /tmp/ramdisk/hurd_20090404.orig.tar.gz -C /mnt'... 24.08 23.22 22.94 23.56 22.89 Average: 23.338 Benchmarking /home/teythoon/ext2fs.sc_unlock... Running 'dd if=/dev/zero of=/mnt/sink bs=1M count=51'... 2.32 2.00 2.40 2.05 2.30 Average: 2.214 Running 'tar xf /tmp/ramdisk/hurd_20090404.orig.tar.gz -C /mnt'... 22.74 22.94 23.26 23.41 23.06 Average: 23.082 Benchmarking /home/teythoon/ext2fs.vanilla.static... Running 'dd if=/dev/zero of=/mnt/sink bs=1M count=51'... 2.60 2.48 2.56 2.52 2.55 Average: 2.542 Running 'tar xf /tmp/ramdisk/hurd_20090404.orig.tar.gz -C /mnt'... 18.70 18.70 18.67 18.78 18.75 Average: 18.72 Benchmarking /home/teythoon/ext2fs.sc_unlock.static... Running 'dd if=/dev/zero of=/mnt/sink bs=1M count=51'... 2.30 2.35 2.30 2.30 2.30 Average: 2.31 Running 'tar xf /tmp/ramdisk/hurd_20090404.orig.tar.gz -C /mnt'... 18.73 18.74 18.78 18.75 18.80 Average: 18.76 Somehow I expected the performance of the storeio backed filesystem to be somewhat better... Justus
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