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authorLukas Larsson <[email protected]>2017-10-02 10:40:25 +0200
committerLukas Larsson <[email protected]>2017-10-02 10:40:25 +0200
commit9033a41375f3a31a18eb0cba3ea0dc84efbc0aa0 (patch)
tree8731693cd5c15ffd8f064a3f304aec49fdcebca8 /erts/doc/src/erl.xml
parentf75fa8129fcd18fc56407778960252e6c10a3a37 (diff)
parent0c6df1f92be6337efe4d7e3d1964063f9acf770f (diff)
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Merge branch 'lukas/erts/poll-thread/OTP-14346'
* lukas/erts/poll-thread/OTP-14346: (25 commits) erts: Trigger ready events when erts_io_control fails erts: enif_select steal test kernel: Rewrite gen_udp_SUITE:read_packet tc erts: disable kernel-poll on OS X vsn < 16 erts: Fix msacc testcase with new poll-thread erts: Add testcases to test IOp and IOt options erts: get_internal_state(check_io_debug) now prints to error_logger erts: Remove eager check io erts: Move all I/O polling to a seperate thread erts: Fix smp_select testcase to use ERL_DRV_USE erts: Fix msacc unmanaged state counter erts: Optimize port_task quick allocator erts: Add ERTS_THR_PREF_QUICK_ALLOC_IMPL erts: Update suspend of scheduler to handle multiple pollsets erts: Add multiple poll sets erts: Some code cleanup for gdb to work better erts: temp_alloc can no longer be disabled erts: Refactor check_io to use one static struct erts: Replace check_io spinlock with lock-less list insertion erts: Add number of enif_select's to check_io_debug ...
Diffstat (limited to 'erts/doc/src/erl.xml')
-rw-r--r--erts/doc/src/erl.xml54
1 files changed, 29 insertions, 25 deletions
diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml
index 71fe08d4e6..dc58cdeb13 100644
--- a/erts/doc/src/erl.xml
+++ b/erts/doc/src/erl.xml
@@ -762,13 +762,36 @@
<seealso marker="erlang#process_flag_message_queue_data">
<c>process_flag(message_queue_data, MQD)</c></seealso>.</p>
</item>
- <tag><c><![CDATA[+K true | false]]></c></tag>
+ <tag><marker id="+IOp"/><c>+IOp PollSets</c></tag>
<item>
- <p>Enables or disables the kernel poll functionality if supported by
- the emulator. Defaults to <c><![CDATA[false]]></c> (disabled).
- If the emulator does not support kernel poll, and flag
- <c><![CDATA[+K]]></c> is passed to the emulator, a warning is
- issued at startup.</p>
+ <p>Sets the number of IO pollsets to use when polling for I/O.
+ This option is only used on platforms that support concurrent
+ updates of a pollset, otherwise the same number of pollsets
+ are used as IO poll threads.
+ The default is 1.
+ </p>
+ </item>
+ <tag><marker id="+IOt"/><c>+IOt PollThreads</c></tag>
+ <item>
+ <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>
+ </item>
+ <tag><marker id="+IOPp"/><c>+IOPp PollSetsPercentage</c></tag>
+ <item>
+ <p>Similar to <seealso marker="#+IOp"><c>+IOp</c></seealso> but uses
+ percentages to set the number of IO pollsets to create, based on the
+ number of poll threads configured. If both <c>+IOPp</c> and <c>+IOp</c>
+ are used, <c>+IOPp</c> is ignored.
+ </p>
+ </item>
+ <tag><marker id="+IOPt"/><c>+IOPt PollThreadsPercentage</c></tag>
+ <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
+ <c>+IOt</c> are used, <c>+IOPt</c> is ignored.
+ </p>
</item>
<tag><c><![CDATA[+l]]></c></tag>
<item>
@@ -1273,25 +1296,6 @@
<seealso marker="erlang#system_info_cpu_topology">
<c>erlang:system_info(cpu_topology)</c></seealso>.</p>
</item>
- <tag><marker id="+secio"/><c>+secio true|false</c></tag>
- <item>
- <p>Enables or disables eager check I/O scheduling. Defaults
- to <c>true</c>. The default was changed from <c>false</c>
- as from ERTS 7.0. The behavior before this
- flag was introduced corresponds to <c>+secio false</c>.</p>
- <p>The flag effects when schedulers will check for I/O
- operations possible to execute, and when such I/O operations
- will execute. As the parameter name implies,
- schedulers are more eager to check for I/O when
- <c>true</c> is passed. This, however, also implies that
- execution of outstanding I/O operation is not
- prioritized to the same extent as when <c>false</c> is
- passed.</p>
- <p><seealso marker="erlang#system_info_eager_check_io">
- <c>erlang:system_info(eager_check_io)</c></seealso>
- returns the value of this parameter used when starting
- the virtual machine.</p>
- </item>
<tag><marker id="+sfwi"/><c>+sfwi Interval</c></tag>
<item>
<p>Sets scheduler-forced wakeup interval. All run queues are