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| author | John Högberg <[email protected]> | 2017-07-06 12:30:45 +0200 |
|---|---|---|
| committer | John Högberg <[email protected]> | 2017-07-06 12:30:45 +0200 |
| commit | 5a537ae41c2295f7f19e4e01fe90acc7585f5b30 (patch) | |
| tree | 7a27a822fa0e7a09e2259a77683ca4f2632df0b3 /lib/tools/doc/src/lcnt_chapter.xml | |
| parent | 5e0019ebb29a9fd88e0b04f0bd0b0d722e3f189e (diff) | |
| parent | 876ecc058d0d7dd48f8c5f7ddaf189d278e69925 (diff) | |
| download | otp-5a537ae41c2295f7f19e4e01fe90acc7585f5b30.tar.gz otp-5a537ae41c2295f7f19e4e01fe90acc7585f5b30.tar.bz2 otp-5a537ae41c2295f7f19e4e01fe90acc7585f5b30.zip | |
Merge branch 'john/erts/runtime-lcnt' into maint
* john/erts/runtime-lcnt:
Document rt_mask and add warnings about copy_save
Add an emulator test suite for lock counting
Break erts_debug:lock_counters/1 into separate BIFs
Allow toggling lock counting at runtime
Move lock flags to a common header
Enable register_SUITE for lcnt builds
Enable lcnt smoke test on all builds that have lcnt enabled
Make lock counter info independent of the locks being counted
OTP-14412
OTP-13170
OTP-14413
Diffstat (limited to 'lib/tools/doc/src/lcnt_chapter.xml')
| -rw-r--r-- | lib/tools/doc/src/lcnt_chapter.xml | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/lib/tools/doc/src/lcnt_chapter.xml b/lib/tools/doc/src/lcnt_chapter.xml index c73fcb31e0..24b58136aa 100644 --- a/lib/tools/doc/src/lcnt_chapter.xml +++ b/lib/tools/doc/src/lcnt_chapter.xml @@ -29,7 +29,7 @@ <approved>nobody</approved> <checked>no</checked> <date>2009-11-26</date> - <rev>PA1</rev> + <rev>PA2</rev> <file>lcnt_chapter.xml</file> </header> <p> @@ -97,8 +97,11 @@ ok ok </pre> <p> - Another way to to profile a specific function is to use <c>lcnt:apply/3</c> or <c>lcnt:apply/1</c> which does <c>lcnt:clear/0</c> before the function and <c>lcnt:collect/0</c> after its invocation. - It also sets <c>copy_save</c> to <c>true</c> for the duration of the function call + Another way to to profile a specific function is to use <c>lcnt:apply/3</c> or <c>lcnt:apply/1</c> + which does <c>lcnt:clear/0</c> before the function and <c>lcnt:collect/0</c> after its invocation. + This method should only be used in micro-benchmarks since it sets <c>copy_save</c> to <c>true</c> + for the duration of the function call, which may cause the emulator to run out of memory if + attempted under load. </p> <pre> Erlang R13B03 (erts-5.7.4) [source] [smp:8:8] [rq:8] [async-threads:0] [hipe] |