diff options
Diffstat (limited to 'erts/doc/src/erl.xml')
| -rw-r--r-- | erts/doc/src/erl.xml | 50 |
1 files changed, 16 insertions, 34 deletions
diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml index d0a0ceaeba..53f46d2a2e 100644 --- a/erts/doc/src/erl.xml +++ b/erts/doc/src/erl.xml @@ -41,25 +41,11 @@ to scroll back to text which has scrolled off the screen. The <c><![CDATA[erl]]></c> program must be used, however, in pipelines or if you want to redirect standard input or output.</p> - <note><p>As of ERTS version 5.8 (OTP-R14A) the runtime system will by - default bind schedulers to logical processors using the - <c>default_bind</c> bind type if the amount of schedulers are - at least equal to the amount of logical processors configured, - binding of schedulers is supported, and a CPU topology is - available at startup. - </p><p> - If the Erlang runtime system is the only operating system - process that binds threads to logical processors, this - improves the performance of the runtime system. However, - if other operating system processes (as for example - another Erlang runtime system) also bind threads to - logical processors, there might be a performance penalty - instead. If this is the case you, are are advised to - unbind the schedulers using the - <seealso marker="#+sbt">+sbtu</seealso> command line argument, - or by invoking - <seealso marker="erlang#system_flag_scheduler_bind_type">erlang:system_flag(scheduler_bind_type, - unbound)</seealso>.</p> + <note><p>As of ERTS version 5.9 (OTP-R15B) the runtime system will by + default <em>not</em> bind schedulers to logical processors. + For more information see documentation of the + <seealso marker="#+sbt">+sbt</seealso> system flag. + </p> </note> </description> <funcs> @@ -725,22 +711,18 @@ that the <c>+sct</c> flag may have to be passed before the <c>+sbt</c> flag on the command line (in case no CPU topology has been automatically detected).</p> - <p>The runtime system will by default bind schedulers to logical - processors using the <c>default_bind</c> bind type if the amount - of schedulers are at least equal to the amount of logical - processors configured, binding of schedulers is supported, - and a CPU topology is available at startup. + <p>The runtime system will by default <em>not</em> bind schedulers + to logical processors. </p> - <p><em>NOTE:</em> If the Erlang runtime system is the only operating - system process that binds threads to logical processors, this - improves the performance of the runtime system. However, if other - operating system processes (as for example another Erlang runtime - system) also bind threads to logical processors, there might be a - performance penalty instead. If this is the case you, are advised - to unbind the schedulers using the <c>+sbtu</c> command line - argument, or by invoking - <seealso marker="erlang#system_flag_scheduler_bind_type">erlang:system_flag(scheduler_bind_type, - unbound)</seealso>.</p> + <p><em>NOTE:</em> If the Erlang runtime system is the only operating system + process that binds threads to logical processors, this + improves the performance of the runtime system. However, + if other operating system processes (as for example + another Erlang runtime system) also bind threads to + logical processors, there might be a performance penalty + instead. In some cases this performance penalty might be + severe. If this is the case, you are advised to not + bind the schedulers.</p> <p>For more information, see <seealso marker="erlang#system_flag_scheduler_bind_type">erlang:system_flag(scheduler_bind_type, SchedulerBindType)</seealso>. </p> |