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authorRickard Green <[email protected]>2015-08-19 16:15:32 +0200
committerRickard Green <[email protected]>2015-08-21 10:01:08 +0200
commit08f8b454596d51de367e5559b7104300c2a7b954 (patch)
tree3ba3c8b7c6bfe777ea0b799650ec353e81682a3a /HOWTO/INSTALL.md
parent61828f77ca2542109ece006d730a4f8fe3300616 (diff)
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Improve choice of clock sources at build time
- Documented the configure switch --with-clock-resolution=<RES> - Changed default clock source for OS system time on Darwin to gettimeofday(). In order to use clock_get_time(CALENDER_CLOCK, ...) on Darwin, the user has to pass --with-clock-resolution=high when configuring the build.
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diff --git a/HOWTO/INSTALL.md b/HOWTO/INSTALL.md
index 837e6cbd76..6434eda253 100644
--- a/HOWTO/INSTALL.md
+++ b/HOWTO/INSTALL.md
@@ -406,6 +406,10 @@ Some of the available `configure` options are:
time source with elapsed time during suspend.
* `--disable-prefer-elapsed-monotonic-time-during-suspend` - Do not prefer an OS
monotonic time source with elapsed time during suspend.
+* `--with-clock-resolution=high|low` - Try to find clock sources for OS system
+ time, and OS monotonic time with higher or lower resolution than chosen by
+ default. Note that both alternatives may have a negative impact on the performance
+ and scalability compared to the default clock sources chosen.
* `--enable-dirty-schedulers` - Enable the **experimental** dirty schedulers
functionality. Note that the dirty schedulers functionality is experimental,
and **not supported**. This functionality **will** be subject to backward