[sheepdog] [sheepdog/sheepdog] dd924b: sheep: add a new option for setting threads for dy...

[Hitoshi Mitake]

  Branch: refs/heads/master
  Home:   https://github.com/sheepdog/sheepdog
  Commit: dd924bdb67b0f5fa668afb24a1152be0c93b1796
      https://github.com/sheepdog/sheepdog/commit/dd924bdb67b0f5fa668afb24a1152be0c93b1796
  Author: Takashi Menjo <menjo.takashi at lab.ntt.co.jp>
  Date:   2017-01-23 (Mon, 23 Jan 2017)

  Changed paths:
    M include/work.h
    M lib/work.c
    M sheep/sheep.c

  Log Message:
  -----------
  sheep: add a new option for setting threads for dynamic workqueues

This commit adds a new option -x to sheep for configuring the maximum
number of threads for dynamic workqueues.

Example:

  # Set the max number of threads for dynamic workqueues to 500
  $ sheep -x 500

If this is not passed, sheep uses a default formula for configuring
the maximum number (that is, max(#nodes,#cores,16)*2).

This is for tuning performance, so please be careful to use. Sheep
works very slowly if you give a too small number, or may be shot by
OOM-killer under heavy load if you give a huge number.

Signed-off-by: Takashi Menjo <menjo.takashi at lab.ntt.co.jp>


  Commit: c42b9d5f0cd5998911cc271f31dbb934380c4ddf
      https://github.com/sheepdog/sheepdog/commit/c42b9d5f0cd5998911cc271f31dbb934380c4ddf
  Author: Takashi Menjo <menjo.takashi at lab.ntt.co.jp>
  Date:   2017-01-23 (Mon, 23 Jan 2017)

  Changed paths:
    M lib/work.c

  Log Message:
  -----------
  sheep: fix logic for setting the max number of threads for dynamic WQ

This commit makes a minor change on "doubling growth". If the double
of the current number of threads for a dynamic queue exceeds the
maximum number, that workqueue grows into that maximum number.

Signed-off-by: Takashi Menjo <menjo.takashi at lab.ntt.co.jp>


  Commit: 810e4c6d921f4c339e48311dd7a3ad58914a83f7
      https://github.com/sheepdog/sheepdog/commit/810e4c6d921f4c339e48311dd7a3ad58914a83f7
  Author: Hitoshi Mitake <mitake.hitoshi at gmail.com>
  Date:   2017-01-23 (Mon, 23 Jan 2017)

  Changed paths:
    M include/work.h
    M lib/work.c
    M sheep/sheep.c

  Log Message:
  -----------
  Merge pull request #351 from tmenjo/fix-max-dynamic-threads

sheep: add a new option for setting threads for dynamic workqueues


Compare: https://github.com/sheepdog/sheepdog/compare/729e66ae8c1e...810e4c6d921f