Department of Computer Science
University of São Paulo
São Paulo, Brazil
Compression and Performance Statistics
On this page you can find some of our compression tests on swapped out
pages in Linux 2.4. This page was created to help us out visualize and
make some analysis on these data. WARNING: this material is still
very raw and some numbers may not be correct due to unpredictable
situations. If you have any suggestions or opinion, please
send an e-mail to us at linuxcompressed-devel@lists.sourceforge.net.
Configuration
Acknowledgements: special thanks to Livio Baldini Soares
for running these tests on his machine.
- 486 DX 50 MHz
- 24 Mb RAM
- 48 Mb Swap
- Kernels tested:
- 2.4.6 Linux Kernel + 0.17 Compressed Cache
- 2.4.6 Linux Kernel
- Compression Algorithm: WKdm
Test Run
Kernel Compilation (2.2.19 vanilla)
- command:
time "make -j2 dep; make -j2 bzImage"
2.4.6 + 0.17 comp cache 500 pages
real 135m5.470s
user 127m32.400s
sys 5m39.990s
compressed cache - statistics
-- algorithm --
WKdm
-- pages --
21976
-- size --
min | max | mean
272 | 4092 | 2172
compression ratio: 53%
discarded pages: 2115
discarded ratio: 9%
2.4.6 + 0.17 comp cache 500 pages
real 133m25.466s
user 127m10.930s
sys 5m16.370s
Page last updated on "Tue Jun 4 06:58:39 2002"
Send feedback to Rodrigo S. de Castro
<rcastro@lists.sourceforge.net>