diff options
Diffstat (limited to 'erts/doc')
| -rw-r--r-- | erts/doc/src/erl.xml | 6 | ||||
| -rw-r--r-- | erts/doc/src/erlang.xml | 15 |
2 files changed, 16 insertions, 5 deletions
diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml index dc58cdeb13..6f6eca2a0b 100644 --- a/erts/doc/src/erl.xml +++ b/erts/doc/src/erl.xml @@ -776,6 +776,10 @@ <p>Sets the number of IO poll threads to use when polling for I/O. The maximum number of poll threads allowed is 1024. The default is 1. </p> + <p>A good way to check if more IO poll threads are needed is to use + <seealso marker="runtime_tools:msacc">microstate accounting</seealso> + and see what the load of the IO poll thread is. If it is high it could + be a good idea to add more threads.</p> </item> <tag><marker id="+IOPp"/><c>+IOPp PollSetsPercentage</c></tag> <item> @@ -789,7 +793,7 @@ <item> <p>Similar to <seealso marker="#+IOt"><c>+IOt</c></seealso> but uses percentages to set the number of IO poll threads to create, based on - the number of schedulers configures. If both <c>+IOPt</c> and + the number of schedulers configured. If both <c>+IOPt</c> and <c>+IOt</c> are used, <c>+IOPt</c> is ignored. </p> </item> diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml index 06f568c832..8dbebe880d 100644 --- a/erts/doc/src/erlang.xml +++ b/erts/doc/src/erlang.xml @@ -6475,17 +6475,24 @@ lists:map( <p><c><anno>MSAcc_Thread_Type</anno></c>s:</p> <taglist> <tag><c>scheduler</c></tag> - <item>The main execution threads that do most of the work.</item> + <item>The main execution threads that do most of the work. See + <seealso marker="erts:erl#+S">erl +S</seealso> for more details.</item> <tag><c>dirty_cpu_scheduler</c></tag> - <item>The threads for long running cpu intensive work.</item> + <item>The threads for long running cpu intensive work. See + <seealso marker="erts:erl#+SDcpu">erl +SDcpu</seealso> for more details.</item> <tag><c>dirty_io_scheduler</c></tag> - <item>The threads for long running I/O work.</item> + <item>The threads for long running I/O work. See + <seealso marker="erts:erl#+SDio">erl +SDio</seealso> for more details.</item> <tag><c>async</c></tag> <item>Async threads are used by various linked-in drivers (mainly the - file drivers) do offload non-CPU intensive work.</item> + file drivers) do offload non-CPU intensive work. See + <seealso marker="erts:erl#+async_thread_pool_size">erl +A</seealso> for more details.</item> <tag><c>aux</c></tag> <item>Takes care of any work that is not specifically assigned to a scheduler.</item> + <tag><c>poll</c></tag> + <item>Does the IO polling for the emulator. See + <seealso marker="erts:erl#+IOt">erl +IOt</seealso> for more details.</item> </taglist> <p>The following <c><anno>MSAcc_Thread_State</anno></c>s are available. All states are exclusive, meaning that a thread cannot be in two |