Messages in this thread | | | Subject | Re: [PATCH 1/2] pidmap(2) | From | Randy Dunlap <> | Date | Tue, 5 Sep 2017 16:02:37 -0700 |
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On 09/05/17 15:53, Andrew Morton wrote: > On Tue, 5 Sep 2017 22:05:00 +0300 Alexey Dobriyan <adobriyan@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. >
also, I expect that the tiny kernel people will want kconfig options for these syscalls.
-- ~Randy
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