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!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: 17 Jun 91 12:47:36 GMT References: <571@ceco.ceco.com> <1991Jun14.221944.28068@Eyring.COM> Sender: usenet@sunova.ssc.gov Reply-To: cwk@psychosis.ssc.gov Organization: SSC Laboratory, Dallas, TX Lines: 67 In-Reply-To: dan@Eyring.COM's message of 14 Jun 91 22:19:44 GMT Nntp-Posting-Host: boomer.ssc.gov >>>>> On 14 Jun 91 22:19:44 GMT, dan@Eyring.COM (Dan Fritch) said: In article <1991Jun14.221944.28068@Eyring.COM> dan@Eyring.COM (Dan Fritch) writes: Dan> In reviewing the article about "Summary of opinions and info on Dan> realtime kernels (long)", we were disappointed that PDOS and its Dan> run-time companion, VMEPROM, were not listed in the benchmark Dan> timings. We thought this might be of interest. PDOS is a full Dan> real-time operating system which supports multi-processing with a Dan> rich compliment of development and debugging tools. Dan> The following table provides the comparative PDOS time for each Dan> test. Also included are comments about the various tests at the Dan> end of the table. These tests were run on the same hardware that Dan> the other kernels were tested on -- a MVME147S-1 with a 68030 Dan> processor running at 25 mHz. Therefore, all timings should be Dan> compatible. As one of the principle participants in the SSC Labs evaluation of real-time kernels, I find Eyring Inc's number (see below) a bit hard to swallow. Our test program was carefully designed to test similar calling sequences in each kernel. Unless this program is used with PDOS, the numbers obtained are certainly questionable. Purhaps they would like to supply us with an evaluation copy of their product and let us run the tests ourselves. Dan> **************************************************************** Dan> * denotes the fastest system for each test Dan> pSOS+ VRTX32 LynxOS VxWorks PDOS Dan> Creat/Del Task 591 371* --- 1423 1113 Dan> Ping Suspend 114 128 --- 117 79* Dan> Suspend/Res. 71 83 --- 69 27* Dan> Get/Release Sem. 55 63 55 74 2* Dan> Interrupt Service Dan> Response 6 6 13 6 3* Dan> Interrupt Task Dan> Response 163 169 175 125 41* Dan> Dan> All times are in micro-seconds Dan> Additional Information on PDOS and related products as well as Dan> any questions on our tests may be obtained from: Dan> Eyring Systems Software Division Dan> 1455 West 820 North Dan> Provo, UT 84601 Dan> Phone: 1-800-YES-PDOS or 1-801-375-2434 Dan> Fax: 1-801-377-3850 Dan> Email: pdos-info@Eyring.COM Dan> -- Dan> Dan Fritch dan@Eyring.COM uunet!lanai!dan Dan> Eyring Inc. +1 801-375-2434 x401 -- +--------------------------------------------------------------------------+ | Carl W. Kalbfleisch cwk@psychosis.ssc.gov | | Superconducting Super Collider Laboratory | | 2550 Beckleymeade Avenue, MS-4002 | | Dallas, Texas 75237 (214) 708-3428 | +--------------------------------------------------------------------------+