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-rw-r--r--erts/doc/src/erlang.xml11
1 files changed, 11 insertions, 0 deletions
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index d0d35ea25f..6915b35fcb 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -131,6 +131,17 @@
</note>
</item>
+ <tag><c>perf_counter</c></tag>
+ <item><p>Symbolic representation of the performance counter
+ time unit used by the Erlang runtime system.</p>
+
+ <p>The <c>perf_counter</c> time unit behaves much in the same way
+ as the <c>native</c> time unit. That is it might differ inbetween
+ run-time restarts. You get values of this type by calling
+ <seealso marker="kernel:os#perf_counter/0"><c>os:perf_counter()</c></seealso>
+ </p>
+ </item>
+
</taglist>
<p>The <c>time_unit/0</c> type may be extended. Use