Re: [RFC] LZO de/compression support - take 6

["Bret Towe" <magnade@gmail.com>]

On 5/28/07, Nitin Gupta <nitingupta910@gmail.com> wrote:
> Hi,
>
> Attached is tester code used for testing.
> (developed by Daniel Hazelton -- modified slightly to now use 'take 6'
> version for 'TinyLZO')
>
> Cheers,
> Nitin
>
> On 5/28/07, Nitin Gupta <nitingupta910@gmail.com> wrote:
> > (Using tester program from Daniel)
> >
> > Following compares this kernel port ('take 6') vs original miniLZO code:
> >
> > 'TinyLZO' refers to this kernel port.
> >
> > 10000 run averages:
> > 'Tiny LZO':
> >        Combined: 61.2223 usec
> >        Compression: 41.8412 usec
> >        Decompression: 19.3811 usec
> > 'miniLZO':
> >        Combined: 66.0444 usec
> >        Compression: 46.6323 usec
> >        Decompression: 19.4121 usec
> >
> > Result:
> > Overall: TinyLZO is 7.3% faster
> > Compressor: TinyLZO is 10.2% faster
> > Decompressor: TinyLZO is 0.15% faster
> >

10000 run averages:
'Tiny LZO':
       Combined: 112.6642 usec
       Compression: 56.3321 usec
       Decompression: 56.3321 usec
'miniLZO':
       Combined: 77.6642 usec
       Compression: 56.3416 usec
       Decompression: 21.3226 usec

now the interesting bit I thought was the following
root@mini:/usr/src/lzo1x-test-4# ./fulltest
[test_lzo.c::compress (93)] run took 42 microseconds
[test_lzo.c::decompress (127)] run took 20 microseconds
root@mini:/usr/src/lzo1x-test-4# ./tinytest
[test.c::compress (91)] run took 44 microseconds
[test.c::decompress (117)] BUG: lzo1x_decompress has failed ( t == -6 )
[test.c::main (149)] BUG: Decompression routine failure
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