Samuel Thibault wrote: >> but shouldn't it return the restricted topology (or have a method that >> returns the restricted topology). >> > > It should already be the default. To get the whole system, see lstopo > --help: --whole-system >
Maybe he's referring to when the process launcher does a sched_setaffinity/numatcl to restrict this process, as opposed to administrator-wide restriction with linux cpusets or so. We could add another topology flag for such restrictions. >> Another thing that would be nice to have (but much less important for >> me) is having a callback that can be called when/if the topology >> changes. >> > > I've wondered how to implement topology changes indeed. AIX does have a > SIGRECONFIG signal for this, I don't know any support from other OSes. > that'd mean having to poll for changes, how often, and in which context? > (another thread? an explicit polling request from the application?). I'd > rather avoid the thread usage and just let the application decide both > how often and in which context. In other words, actually maybe all we > need is a function to compare two topologies? > Maybe there's a inotify way to get such changes in Linux. Brice
