Messages in this thread | | | Date | Fri, 25 May 2007 10:40:41 +0530 | From | "Nitin Gupta" <> | Subject | Re: [RFC] LZO de/compression support - take 3 |
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On 5/25/07, Bret Towe <magnade@gmail.com> wrote: > On 5/24/07, Nitin Gupta <nitingupta910@gmail.com> wrote: > > On 5/23/07, Bret Towe <magnade@gmail.com> wrote: > > > On 5/23/07, Nitin Gupta <nitingupta910@gmail.com> 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.
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