From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Sat, 9 Apr 2011 20:41:22 +0200 From: Richard Cochran Message-ID: <20110409184122.GA11908@domain.hid> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Subject: [Xenomai-core] arm ixp: more trouble with recent xenomai List-Id: Xenomai life and development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: xenomai@xenomai.org After fixing the ipipe big endian issue, I have run into some more problems on my arm ixp425. Ipipe kernel 2.6.31 with xenomai 2.5.6 boots and runs fine. Ipipe kernel .33 and .35 both boot, but freeze when xenomai is enabled. I tried building xenomai as modules, and I found that loading xeno_nucleus is okay, but the system freezes immediately on loading xeno_native or xeno_posix. I tried disabling various CONFIG options, and I found by accident that enabling IPIPE_DEBUG allows the system to run just fine. Any hints on where to go from here? BTW, I also started to compare latency results from various combinations of ipipe/xenomai. The results a summarized in the table below. For the tests, I cleared /proc/xenomai/latency to zero and ran two instances of "busy.sh", each one in its own xterm, via ssh. Toward the end of each run, I stopped the scripts at let the system idle for about ten seconds, in order to get a reading of the minimum latency, too. Thanks in advance, Richard * latency |--------+---------+-------+---------+---------+---------+----------| | Kernel | Xeno | IPIPE | | | | | | Vers | Vers | DEBUG | lat min | lat avg | lat max | duration | |--------+---------+-------+---------+---------+---------+----------| | v30 | v2.4.10 | no | 8.430 | 17.310 | 63.510 | 00:02:35 | | v31 | v2.5.6 | no | 7.215 | 34.020 | 85.350 | 00:02:58 | | v33 | v2.5.6 | yes | 17.250 | 55.815 | 127.516 | 00:02:00 | | v35 | v2.5.6 | yes | 7.140 | 34.200 | 84.180 | 00:02:17 | |--------+---------+-------+---------+---------+---------+----------| * busy.sh #!/bin/sh while [ 1 ] ; do find / cat /dev/mem > /dev/null hackbench -g 1 -T 4 -s 1000 -l 1000 calibrator 400 1M /tmp/out done