Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!pacific.mps.ohio-state.edu!linac!sunova!sunova.ssc.gov!cwk From: cwk@boomer.ssc.gov (Carl W. Kalbfleisch) Newsgroups: comp.realtime Subject: Re: Summary of opinions and info on realtime kernels (long) Message-ID: Date: 12 Jun 91 12:19:02 GMT References: <577@ceco.ceco.com> Sender: usenet@sunova.ssc.gov Reply-To: cwk@psychosis.ssc.gov Organization: SSC Laboratory, Dallas, TX Lines: 40 In-Reply-To: sung@ceco.ceco.com's message of 10 Jun 91 18:32:16 GMT Nntp-Posting-Host: boomer.ssc.gov >>>>> On 10 Jun 91 18:32:16 GMT, sung@ceco.ceco.com (Sung Han) said: In article <577@ceco.ceco.com> sung@ceco.ceco.com (Sung Han) writes: Ready Sys> 6) RTsource will allow you dedicate a window to each task in Ready Sys> the system. Ready Sys> ... Ready Sys> You can set a breakpoint on one processor Ready Sys> and ask RTSource to stop all of the processors when that one Ready Sys> processor hits its breakpoint. Sung> Good point - multitask debugging is a strong point of RTSource. XRAY+ and Sung> VxGDB normally follow a single task at a time, and don't offer any Sung> multiprocessor debugging features (I think). Actually XRAY+ is a system level debugger. A breakpoint can be put on any task in the system. When the breakpoint is hit, the entire system is stopped. It is not possible to keep the other tasks running. Debugging multiproccessor environments currently requires one XRAY+ program running for each target. Apparanetly they will use some shared data space in the host. According to information I received at the MRI User's Group meeting in April, future version of XRAY may be able to support multiple targets simultaneously. Also, while running XRAY+, the on board monitor, pROBE+, can be accessed to determine the state of pSOS+ objects (tasks, queues, etc). I believe this level debugging can only be achieved on VRTX with RTscope, which can not be run while running RTsource. (Ready can comment on this, please). -- +--------------------------------------------------------------------------+ | Carl W. Kalbfleisch cwk@psychosis.ssc.gov | | Superconducting Super Collider Laboratory | | 2550 Beckleymeade Avenue, MS-4002 | | Dallas, Texas 75237 (214) 708-3428 | +--------------------------------------------------------------------------+