From: Wolfgang Grandegger <wg@domain.hid>
To: xenomai@xenomai.org
Subject: [Xenomai-core] Xenomai t0-2 latency measurements
Date: Fri, 13 Jan 2006 12:13:01 +0100 [thread overview]
Message-ID: <43C78B3D.1050201@domain.hid> (raw)
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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.
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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
reply other threads:[~2006-01-13 11:13 UTC|newest]
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