lkml.org 
[lkml]   [2011]   [Aug]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    SubjectRe: m68k: Convert to genirq (WIP)
    From
    On Fri, Jun 17, 2011 at 05:45, Finn Thain <fthain@telegraphics.com.au> wrote:
    > On Thu, 16 Jun 2011, Geert Uytterhoeven wrote:
    >> On Wed, Jun 15, 2011 at 21:44, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
    >> > On Sat, Jun 4, 2011 at 19:56, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
    >> >> On Sat, May 28, 2011 at 20:32, Geert Uytterhoeven <geert@linux-m68k.org> wrote:
    >> >>
    >> >> It works on Amiga now, too. It can still use some optimizations in
    >> >> the irq_{enable,disable,ack,mask,mask_ack,unmask} area, as my
    >> >> BogoMIPS rating dropped by ca 2.5% and is now under 16, for a 25 MHz
    >> >> 68040.
    >> >
    >> > Seems like everything (Atari/ARAnyM and Amiga) still works when using
    >> > handle_simple_irq instead of handle_level_irq. As a bonus, BogoMIPS is
    >> > above 16 again.
    >
    > Your bogomips benchmark would be the best-case penalty, right?
    >
    > Have you tried say, sending a ping flood to measure throughput and
    > latency?

    Results on Amiga 4000/040 (25 MHz 68040, 12 MiB Fast RAM) with Ariadne Ethernet,
    running 3.0-rc7.

    legacy m68k genirq

    bogomips: 16.17 (lpj=80896) 16.02 (lpj=80128)

    10x ping fast machine: 9034 ms 9025 ms
    rtt min/avg/max/mdev (ms) 1.815/2.556/8.580/2.008 1.903/2.142/3.275/0.388

    100x flood ping fast machine: 4654 ms 3960 ms
    rtt min/avg/max/mdev (ms) 1.831/2.113/3.285/0.361 1.887/2.068/2.958/0.242
    pipe, ipg/ewma (ms) 10, 47.013/2.111 6, 40.005/1.989

    wget 16 MiB image 86.99 KB/s 112.08 KB/s
    104.31 KB/s 115.95 KB/s
    109.56 KB/s 116.22 KB/s


    /proc/interrupts (legacy m68k):

    auto 1: 0 int1
    auto 2: 152824 CIAA, ide0, eth0
    auto 3: 133649 int3
    auto 4: 0 int4
    auto 5: 0 int5
    auto 6: 193334 CIAB
    amiga 8: 0 serial TX
    amiga 12: 133649 fb vertb handler
    amiga 19: 0 serial RX
    cia 25: 240 amikbd
    cia 27: 193334 timer


    /proc/interrupts (genirq):

    CPU0
    2: 29503 auto CIAA, ide0, eth0
    6: 93738 auto CIAB
    8: 0 amiga serial TX
    12: 64657 amiga fb vertb handler
    13: 3 amiga
    19: 0 amiga serial RX
    25: 788 cia amikbd
    27: 93738 cia timer
    ERR: 0

    I did some more refactoring which made the Mac conversion trivial (but
    still untested).
    I'll prepare it for publishing when the kids leave me alone ;-)

    Gr{oetje,eeting}s,

                            Geert

    --
    Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@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 majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2011-08-08 15:11    [W:0.033 / U:31.172 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site