Here is the first candidate release [1] of the 2.2 series. Updates, fixes and hopefully improvements have taken place all over the map. Added features mainly concern the VxWorks skin and the Adeos support (2.4/2.6, all architectures).
Direct invocation of the VxWorks emulation services running in kernel space is now possible from user-space applications, the same way it is already done with the native, POSIX and RTDM skins. The new interface can be mixed with any of the existing ones, e.g. one may call RTDM services in a user-space application also relying on the VxWorks skin. The former VxWorks-over-UVM support which provides a different approach for running a (sandboxed) VxWorks emulation in user-space is continued and will be maintained though. This said, the trend is clearly to provide to user-space applications a direct call interface to all kernel-based skins (e.g. VRTX, pSOS+ and uITRON), and this work will be pursued during the next releases. Adeos-wise, patches have been upgraded for all architectures. A new kind of interrupt handling called "wired mode" has been introduced in order to shorten the IRQ delivery path, when Adeos may safely assume that some invariant domain always leads the interrupt pipeline (e.g. Xenomai). The wired delivery mode is mainly intended at reducing the worst-case latency figures on low-end hardware, and the average latency in general, without otherwise affecting the pipeline properties. Various tests on different architectures showed that such optimization might or might not be significant (i.e. above the noise level), depending on how much the target platform is sensitive to I-cache and code locality issues, so your mileage may vary. In any case, I would be interested in any feedback regarding the observed performance of such delivery mode on your particular hardware. Here is a short log of other major changes: * [ppc] Adeos/2.4.25 upgraded to Denx's CVS head of linuxppc_2_4_devel [2], as of 2006-04-30. * [i386] FPU support fixes. * [blackfin] Major kernel upgrade to uClinux 2.6.16, with support for the BF537 board [3] sponsored by Analog Devices. * [nucleus] Optimize fast path for handling aperiodic timer ticks. Core interrupt API sanitization. * [doc] Manpages update. * [scripts] Test and preparation scripts updates. * [posix] Various fixes and updates. * [RTDM] Various fixes and updates. * [native] Updates. * [sim] Fix for GCC 4.x. * [uvm] Reorganization of the directory layout. * [testsuite] New "cyclic" test. Please see the ChangeLog for details. Thanks to all contributors. [1] http://download.gna.org/xenomai/testing/xenomai-2.2-rc1.tar.bz2 [2] http://www.denx.de/en/Software/CVS [3] http://www.analog.com/en/prod/0,,ADSP%252DBF537,00.html -- Philippe. _______________________________________________ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
