On Tue, 5 Sep 2017 22:05:00 +0300 Alexey Dobriyan <adobri...@gmail.com> wrote:
> Implement system call for bulk retrieveing of pids in binary form. > > Using /proc is slower than necessary: 3 syscalls + another 3 for each thread + > converting with atoi(). > > /proc may be not mounted especially in containers. Natural extension of > hidepid=2 efforts is to not mount /proc at all. > > It could be used by programs like ps, top or CRIU. Speed increase will > become more drastic once combined with bulk retrieval of process statistics. The patches are performance optimizations, but their changelogs contain no performance measurements! Demonstration of some compelling real-world performance benefits would help things along a lot.
