steve@TITAN.TSD.ARLUT.UTEXAS.EDU (Steve Glicker) (11/23/89)
Over the last few months, I have been collecting numbers on task/process switching speeds. Several tests have been run were two tasks or processes invoke each other several hundred thousand times, execution time is then divided by switches... The information I have collected is in the following table. These test have been conducted on an informal bases. Does anyone have estimates on the speed of lightweight UNIX processes, embedded systems numbers, etc.? I would also appreciate any references to work published on this topic. Platform Test Switching Speed ============== ================ ================= microVAX (VMS) VMS processes ~ 0.6 ms microVAX (VMS) DEC Ada tasks ~ 0.6 ms Sun 3/50 (UNIX) Function call ~ 0.01 ms Sun 3/50 (UNIX) Simula processes ~ 0.2 ms Sun 3/50 (UNIX) Verdix Ada tasks ~ 0.3 ms Sun 3/50 (UNIX) UNIX/C processes ~10.0 ms I understand that the microVAXs ran at ~0.9 VAX 780 MIPS and the Sun 3/50 at ~1.5 VAX 780 MIPS. In the cases of Ada and Simula a scheduler supplied with the language was used. Steve Glicker (steve@titan.tsd.arlut.utexas.edu)