Hi, Thanks a lot Vlad. This explains it. - Does anybody know of a ps command (or a filter to ps command) which will display only multithreaded processes (list processes by TGID) ? (I know now about the option of displaying cgroup.procs , but is something parallel can be done with ps ? ) rgs, Kevin On Tue, Apr 2, 2013 at 10:40 AM, Vlad Dogaru <ddvlad@xxxxxxxxxxxxxxxx> wrote: > On Tue, Apr 02, 2013 at 05:54:56AM +0300, Kevin Wilson wrote: >> Hi? >> Any idea what is the difference "cgroup.procs" entry and "tasks" >> entry of cgroup sysfs? >> both represent pid lists. >> I ran: >> cat /sys/fs/cgroup/cpuset/cgroup.procs >> and >> cat /sys/fs/cgroup/cpuset/tasks >> and entries of cgroup.procs appear in tasks. >> >> However there are many more tasks than cgroup.procs: >> >> cat /sys/fs/cgroup/cpuset/cgroup.procs | wc -l >> 153 >> cat /sys/fs/cgroup/cpuset/tasks | wc -l >> 383 > > The difference you are seeing is because there are some multithreaded > processes in your cpuset. In the cgroup.procs file, each such process > apears only once (listed by its TGID). In the tasks file, each thread > appears once (listed by its PID). > > Check the pidlist_array_load function in kernel/cgroup.c. procs is a > list of (unique) TGIDs, while tasks is a list of PIDs. > > Hope this helps, > Vlad _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
