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>