What John is looking for is called "Leave Non-GPU tasks in memory when suspended", used to be "Leave applications in memory". With this switched on, tasks that suspend keep their whole state in memory. With it switched off tasks that don't checkpoint start from the beginning, tasks that checkpoint start from the last checkpoint. But tasks that don't checkpoint usually don't switch out of memory until they're done. They can only switch out of memory when the user forces the task to do so (suspend), or by quitting BOINC.
-- Jord van der Elst. On Tue, Mar 7, 2017 at 3:09 PM, McLeod, John <[email protected]> wrote: > It depends. If you suspend a task and return all the memory, then you > lose any forward progress since the last check point. There is a setting > that allows the removal from memory (or at least there used to be), but I > don't remember what it is. A suspended task's memory can go to swap with > no problem as it will not be touched until the next time that the task is > resumed. > > -----Original Message----- > From: boinc_dev [mailto:[email protected]] On Behalf Of > Robert Miles > Sent: Tuesday, March 7, 2017 8:22 AM > To: [email protected] > Subject: Re: [boinc_dev] boinc_dev Digest, Vol 153, Issue 3 > > From what I've seen, when BOINC suspends workunits, this DOES NOT free the > memory they are using. > > It looks like BOINC should not be allowed to start a workunit without > checking > whether enough memory is still free, and it should then be required to > repeat > this check before starting the next one. > > Date: Mon, 6 Mar 2017 21:27:47 +0100 > > From: yoyo <[email protected]> > > To: BOINC Developers Mailing List <[email protected]>, > BOINC > > Projects <[email protected]> > > Subject: [boinc_dev] Boinc handling of workunits with much RAM > > requirements > > > > Hello, > > > > I'd like to understand what Boinc does with workunits which require a > > large amount of RAM. > > > > I have workunits which require 10 GB RAM. > > My understandig is, that only hosts which have at least 10 GB free RAM > > are downloading them and only if 10 GB RAM are free they are started? > > > > It is not clear for me what happens when the workunits are running and > > if and how often Boinc checks their RAM consumption and what Boinc does > > if they consume too much RAM. > > > > A user blames, that he has a system with 8 cores and 16 GB RAM. This > > systems has more than 10GB free RAM. So such workunits are downloaded > > and started, 8 of them in parallel at the same time. After some seconds > > all 8 workunits consuming 10 GB RAM each and the system is havily > > swaping and nearly unresponsive. > > Shouldn't Boinc find out, that too much RAM is consumed and suspend some > > of the workunits? > > > > Kind regards, > > yoyo > > _______________________________________________ > boinc_dev mailing list > [email protected] > http://lists.ssl.berkeley.edu/mailman/listinfo/boinc_dev > To unsubscribe, visit the above URL and > (near bottom of page) enter your email address. > _______________________________________________ > boinc_dev mailing list > [email protected] > http://lists.ssl.berkeley.edu/mailman/listinfo/boinc_dev > To unsubscribe, visit the above URL and > (near bottom of page) enter your email address. > _______________________________________________ boinc_dev mailing list [email protected] http://lists.ssl.berkeley.edu/mailman/listinfo/boinc_dev To unsubscribe, visit the above URL and (near bottom of page) enter your email address.
