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| author | Rickard Green <[email protected]> | 2016-01-05 16:55:04 +0100 |
|---|---|---|
| committer | Rickard Green <[email protected]> | 2016-01-20 11:10:37 +0100 |
| commit | 858c6f7fa44f7b2dc363b359198d6522dd60e914 (patch) | |
| tree | fdad35b9a7a9904d7dc4586aced86c79fb46a78c /lib/kernel/doc/src | |
| parent | df18cd270ad682cedc8c21990641b0bdb8788092 (diff) | |
| download | otp-858c6f7fa44f7b2dc363b359198d6522dd60e914.tar.gz otp-858c6f7fa44f7b2dc363b359198d6522dd60e914.tar.bz2 otp-858c6f7fa44f7b2dc363b359198d6522dd60e914.zip | |
Introduce time warp safe trace timestamp formats
New timestamp options for trace, sequential trace, and
system profile:
- monotonic_timestamp
- strict_monotonic_timestamp
Diffstat (limited to 'lib/kernel/doc/src')
| -rw-r--r-- | lib/kernel/doc/src/seq_trace.xml | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/lib/kernel/doc/src/seq_trace.xml b/lib/kernel/doc/src/seq_trace.xml index 3439111035..9f191d488d 100644 --- a/lib/kernel/doc/src/seq_trace.xml +++ b/lib/kernel/doc/src/seq_trace.xml @@ -127,6 +127,34 @@ seq_trace:set_token(OldToken), % activate the trace token again enables/disables a timestamp to be generated for each traced event. Default is <c>false</c>.</p> </item> + <tag><c>set_token(strict_monotonic_timestamp, <anno>Bool</anno>)</c></tag> + <item> + <p>A trace token flag (<c>true | false</c>) which + enables/disables a strict monotonic timestamp to be generated + for each traced event. Default is <c>false</c>. Timestamps will + consist of + <seealso marker="erts:time_correction#Erlang_Monotonic_Time">Erlang + monotonic time</seealso> and a monotonically increasing + integer. The time-stamp has the same format and value + as produced by <c>{erlang:monotonic_time(), + erlang:unique_integer([monotonic])}</c>.</p> + </item> + <tag><c>set_token(monotonic_timestamp, <anno>Bool</anno>)</c></tag> + <item> + <p>A trace token flag (<c>true | false</c>) which + enables/disables a strict monotonic timestamp to be generated + for each traced event. Default is <c>false</c>. Timestamps + will use + <seealso marker="erts:time_correction#Erlang_Monotonic_Time">Erlang + monotonic time</seealso>. The time-stamp has the same + format and value as produced by <c>erlang:monotonic_time()</c>.</p> + </item> + <p>If multiple timestamp flags are passed, <c>timestamp</c> has + precedence over <c>strict_monotonic_timestamp</c> which + in turn has precedence over <c>monotonic_timestamp</c>. All + timestamp flags are remembered, so if two are passed + and the one with highest precedence later is disabled + the other one will become active.</p> </taglist> </desc> </func> |