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| author | Rickard Green <[email protected]> | 2014-08-26 17:26:31 +0200 |
|---|---|---|
| committer | Rickard Green <[email protected]> | 2014-09-25 16:42:20 +0200 |
| commit | 6084a42a24fca52a5de2bc487c0cd2be46dcc21f (patch) | |
| tree | 63fe33c074ccce7dd8bf51e846b9b778b81e4af5 /erts/doc/src | |
| parent | 65e335e255cb76d979f605ed34700e4e02041139 (diff) | |
| download | otp-6084a42a24fca52a5de2bc487c0cd2be46dcc21f.tar.gz otp-6084a42a24fca52a5de2bc487c0cd2be46dcc21f.tar.bz2 otp-6084a42a24fca52a5de2bc487c0cd2be46dcc21f.zip | |
Introduce support for eager check I/O scheduling
Diffstat (limited to 'erts/doc/src')
| -rw-r--r-- | erts/doc/src/erl.xml | 17 | ||||
| -rw-r--r-- | erts/doc/src/erlang.xml | 11 |
2 files changed, 28 insertions, 0 deletions
diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml index 528a2d95aa..967226056e 100644 --- a/erts/doc/src/erl.xml +++ b/erts/doc/src/erl.xml @@ -1065,6 +1065,23 @@ <p>For more information, see <seealso marker="erlang#system_info_cpu_topology">erlang:system_info(cpu_topology)</seealso>.</p> </item> + <tag><marker id="+secio"><c>+secio true|false</c></marker></tag> + <item> + <p>Enable or disable eager check I/O scheduling. The default + is currently <c>false</c>, but will most likely be changed + to <c>true</c> in OTP 18. The behaviour 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 name of the parameter implies, + schedulers will be more eager to check for I/O when + <c>true</c> is passed. This however also implies that + execution of outstanding I/O operation will not be + 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 VM.</p> + </item> <tag><marker id="+sfwi"><c>+sfwi Interval</c></marker></tag> <item> <p>Set scheduler forced wakeup interval. All run queues will diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml index e3ef48a6c1..e02e4cbbc9 100644 --- a/erts/doc/src/erlang.xml +++ b/erts/doc/src/erlang.xml @@ -5611,6 +5611,7 @@ ok <name name="system_info" arity="1" clause_i="52"/> <name name="system_info" arity="1" clause_i="53"/> <name name="system_info" arity="1" clause_i="54"/> + <name name="system_info" arity="1" clause_i="55"/> <fsummary>Information about the system</fsummary> <desc> <p>Returns various information about the current system @@ -5740,6 +5741,16 @@ ok The return value will always be <c>false</c> since the elib_malloc allocator has been removed.</p> </item> + <tag><marker id="system_info_eager_check_io"><c>eager_check_io</c></marker></tag> + <item> + <p> + Returns the value of the <c>erl</c> + <seealso marker="erl#+secio">+secio</seealso> command line + flag which is either <c>true</c> or <c>false</c>. See the + documentation of the command line flag for information about + the different values. + </p> + </item> <tag><c>ets_limit</c></tag> <item> <p>Returns the maximum number of ETS tables allowed. This limit |