Hello,

attached you will find the results of my todays Xenomai latency measurements on various PowerPC boards with Linux 2.4 and 2.6.

Wolfgang.
New latency tests with Xenomai on various PowerPC boards
--------------------------------------------------------

Board   : Processor  CPU-Clk Bus-Clk I-Cache D-Cache Memory Kernel Remarks
                                       
TQM860L : MPC 860     50 MHz  50 MHz    4 KB    4 kB  16 MB 2.4.25
PM825   : MPC 8260   200 MHz  66 MHz   16 KB   16 kB 128 MB 2.4.25 FPU 
Ocotea  : AMCC 440GX 533 MHz 152 MHz   32 KB   32 KB 256 MB 2.6.14 DDR-RAM, L2 256 KB


Linux  : DENX Linux 2.6.14 or DENX Linux 2.4.25 (linuxppc_2_4_devel)
iPipe  : 1.0-02 or 1.1-02
Xenomai: SVN 2006-01-12


LATENCY on TQM860L with load (and -p500):

         |-----lat min|-----lat avg|-----lat max|-overrun|---test-time
     -t0 |       58240|      122240|      217280|       0|    00:05:00
     -t1 |       64480|       97584|      160320|       0|    00:05:00
     -t2 |       24640|       48961|      105280|       0|    00:05:00


LATENCY on PM825 with load:

         |-----lat min|-----lat avg|-----lat max|-overrun|---test-time
     -t0 |       17750|       29125|       64062|       0|    00:05:00
     -t1 |       10188|       22413|       50188|       0|    00:05:00
     -t2 |       15062|       10754|       38438|       0|    00:05:00


LATENCY on Ocotea with load:

         |-----lat min|-----lat avg|-----lat max|-overrun|---test-time
     -t0 |        4897|       10815|       27774|       0|    00:05:00
     -t1 |        3423|        8316|       23935|       0|    00:05:00
     -t2 |        1714|        3701|       12010|       0|    00:05:00


Note: load has been put onto the system by running in a telnet session
      "ping -f <remote-host-ip>" and "calibrator ..." (Cache-Memory and 
      TLB Calibration Tool http://monetdb.cwi.nl/Calibrator/).

Note: all test have been run with CONFIG_XENO_HW_TIMER_LATENCY="1" and
      CONFIG_XENO_HW_SCHED_LATENCY="1" to get correct latancy values.


Old latency measurements:
-------------------------

Linux  : DENX linux-2.6.14-rc3-g4c234921
iPipe  : 1.0-00
Xenomai: SVN 2005-10-15

KLATENCY with load:

         |-----lat min|-----lat avg|-----lat max|-overrun|---test-time
TQM860L  |       50560|       98976|      199040|       0|    00:09:45
Ocotea   |        2953|        5974|       19147|       0|    00:12:05


LATENCY with load:

         |-----lat min|-----lat avg|-----lat max|-overrun|---test-time
TQM860L  |       60480|      120960|      224320|       0|    00:09:46
Ocotea   |        3575|        7438|       24474|       0|    00:10:50

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