A little off topic, but notice how msgrcv is SRB enabled, but not msgsnd or msgget or msgctl ? PIty :-(
Kirk Wolf Dovetailed Technologies http://dovetail.com On Wed, Aug 28, 2013 at 9:06 PM, David Crayford <[email protected]> wrote: > On 29/08/2013 12:13 AM, Paul Gilmartin wrote: > >> On Tue, 27 Aug 2013 19:48:25 -0400, Blaicher, Christopher Y. wrote: >> >>> There are lots of ways to do this. Some of the questions you have to >>> first ask are: 1) Are the tasks asynchronous to each other? 2) Can there be >>> more than one slave task? 3) What are you attempting to accomplish with >>> sub tasks? >>> >>> Can POSIX pipes be used to communicate among tasks/subtasks? >> The important question is, if one task blocks on a read, does the >> whole job block? >> > > POSIX message queues would be a better fit. Call *BPX1QGT*(msgget) with > IPC_PRIVATE to create a private message queue for inter task communication > (not IPC). You can use PLO for serialization with the IPC_PLO/IPC_PLO2 > flags. > All the blocking is done for you and they scale ok. My testcase can > process around 200,000 16k recs per sec on a 2 engine z114. Of course, > POSIX shared memory with semaphores would scale better because you don't > have to > move data around. > > > (I've used pipes to implement some crude dispatching in shell. >> These were named pipes because shell doesn't provide adequate >> pipe primitives. C, Rexx, and Assembler do better.) >> >> -- gil >> >> ------------------------------**------------------------------** >> ---------- >> For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to [email protected] with the message: INFO IBM-MAIN >> > > > ------------------------------**------------------------------**---------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
