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| author | Rickard Green <[email protected]> | 2015-08-19 16:15:32 +0200 |
|---|---|---|
| committer | Rickard Green <[email protected]> | 2015-08-21 10:01:08 +0200 |
| commit | 08f8b454596d51de367e5559b7104300c2a7b954 (patch) | |
| tree | 3ba3c8b7c6bfe777ea0b799650ec353e81682a3a /HOWTO/INSTALL.md | |
| parent | 61828f77ca2542109ece006d730a4f8fe3300616 (diff) | |
| download | otp-08f8b454596d51de367e5559b7104300c2a7b954.tar.gz otp-08f8b454596d51de367e5559b7104300c2a7b954.tar.bz2 otp-08f8b454596d51de367e5559b7104300c2a7b954.zip | |
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.
Diffstat (limited to 'HOWTO/INSTALL.md')
| -rw-r--r-- | HOWTO/INSTALL.md | 4 |
1 files changed, 4 insertions, 0 deletions
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 |