On 5/25/07, Bret Towe <[email protected]> wrote:
On 5/24/07, Nitin Gupta <[email protected]> wrote:
> On 5/23/07, Bret Towe <[email protected]> wrote:
> > On 5/23/07, Nitin Gupta <[email protected]> wrote:
>
> > > For now, tested on x86 only.
> >
> > If you have a program to test this I can run it on an amd64 and a g4 ppc
> >
>
> Attached is the kernel module (compress-test) to test this LZO code.
> Just compile this module against 2.6.22-rc2 with this LZO patch. Then
> testing can be done as:
> 1- Mount DebugFS somewhere e.g:
> mkdir /debug; mount -t debugfs debugfs /debug
> 2- Load the module and do:
> cat /path/to/some_file > /debug/compress_test/compress
> (/var/log/messages should show that compression was successful)
> 3- Then decompress this file as:
> cat /debug/compress_test/decompress > /tmp/t
> (/var/log/messages should show that decompression was successful)
> 4- For extra verification do:
> diff /tmp/t /path/to/some_file -- O/P must be empty
>
>
the test worked fine on amd64
from dmesg:
LZO compress successful: orig_size=17448, comp_size=8183
LZO decompress successful: decomp_size=17448
and input and output files I gave it:
sha1sum test-input output
2221c586e3eb869af7f4333d4f56b441b9aa8414 test-input
2221c586e3eb869af7f4333d4f56b441b9aa8414 output
Good to know it worked correctly on 64-bit system too. I will also
add exporting benchmarking figures soon.
(will be giving the ppc box the same file to test btw when I get to it)
and I don't know if it matters much but I tried feeding it a 260k file
and it didn't like it
cat /usr/bin/yelp > /debug/compress_test/compress
cat: write error: No space left on device
Ah! I forgot to mention that max file size to feed is 256K (this was
just for simplicity of compress-test module implementation).
Thanks for your testing.
- Nitin
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