On 09/05/17 15:53, Andrew Morton wrote: > On Tue, 5 Sep 2017 22:05:00 +0300 Alexey Dobriyan <adobriyan@xxxxxxxxx> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
