On Thu, Aug 16, 2012 at 7:52 PM, Andi Kleen <a...@firstfloor.org> wrote: >> I have locked the Allwinner A10 CPU in my Mele A2000 to 60 MHz using >> cpufreq-set, >> and ran your test. rnd.lzo is a 9 MB file from /dev/urandom compressed with >> lzo. >> There doesn't seem to be a significant difference between all three variants. > > I found that in compression benchmarks it depends a lot on the data > compressed. > > urandom (which should be essentially incompressible) will be handled > by different code paths in the compressor than other more compressible data. > It becomes a complicated memcpy then.
In addition, locking the CPU to 60 MHz may improve the memory access penalty, as a cache miss may cost much less cycles. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/