Hi Anton, The why is: An increase in performance. In this case I want to use some cores to do a very large operation and it will be faster if the same core continues the same operation. Maybe there's a library for doing so, or a way that I dont know in OpenBSD. Now, this cases come not very often, and is debatible (probably already debated in this proyect) that if that's the case you should run a variation of the scheduler or use other OS. And is true... Now, in this moment I see a lot of activity around vmd/vmm, I have been using it myself, is great, I love it, but my guess is that you can get more performance on the guests OS if you set the affinity of the process. Maybe this is already done, or may will be... If that's the case either you added functionality to the OS for supporting affinity or you made vmm part of the OS, and there is the back question. If you add vmm as part of the OS you are "extending" the system duty to be a host, if you add affinity support you are doing the same... Anyways, the proyect clearly knows itself and if there is no affinity support is OK. Still loving OpenBSD. The low punch would be discuss about "nice" support, but lets leave that aside, I dont want a fight like in other post about philosophy and low punches.
Now in MY PARTICULAR CASE, I usually do large math calculations, I've been using other OSes but I love OpenBSD, so I ported my most used tool, spyder (for writing python). I love to test algorithms and things for a large time and things like that. That is my taste, and is not an obligation for OpenBSD to support affinity just because I want (Its obvious), but I see lots of applications for "user level programs", for example vmm, pf, and others components, I dont know if PF and VMM are "user level programs", if they are you are already doing things that might be seen as "not OS duty", if they are not, they would benefit probably of affinity. Just my opinion, again, dont do of this remarks something that it is not... I just kindly ask about a funcionality, because I want to use my favorite OS, made right, and test algorithms and look for big prime numbers on it. If there is no funcionality, then, Its my problem... Elias. 2018-04-29 23:15 GMT-03:00 <li...@wrant.com>: > Sun, 29 Apr 2018 22:07:18 -0300 "Elias M. Mariani" > <marianiel...@gmail.com> >> Hi, >> I was trying to port mprime to OpenBSD. >> The main issue is not finding any way to set affinity on cores. >> Searching for how to do this on OpenBSD bring this result in undeadly: >> http://undeadly.org/cgi?action=article&sid=20090324210236 >> >> Is CPU Affinity dropped out of OpenBSD for some reason? >> >> Elias. >> > > Hi Elias, > > Why do you want to do the operating system duty in user level programs? > > Kind regards, > Anton Lazarov
