From 68cbafa26fa3cc36eb2ed3dd26c0dda41f6fec44 Mon Sep 17 00:00:00 2001 From: Sverker Eriksson Date: Thu, 23 Mar 2017 19:07:53 +0100 Subject: erts: Clarify erl_driver docs about thread safety --- erts/doc/src/erl_driver.xml | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'erts/doc') diff --git a/erts/doc/src/erl_driver.xml b/erts/doc/src/erl_driver.xml index 5705100ab2..ca9d458e1e 100644 --- a/erts/doc/src/erl_driver.xml +++ b/erts/doc/src/erl_driver.xml @@ -157,7 +157,7 @@

Most functions in this API are not thread-safe, that is, - they cannot be called from any thread. Functions + they cannot be called from arbitrary threads. Functions that are not documented as thread-safe can only be called from driver callbacks or function calls descending from a driver callback call. Notice that driver callbacks can be called from -- cgit v1.2.3 From 7b0c3b7e51bf6b13c95565c99cd80191525295e1 Mon Sep 17 00:00:00 2001 From: Sverker Eriksson Date: Tue, 25 Apr 2017 17:42:37 +0200 Subject: erts: Remove undocumented driver_event --- erts/doc/src/driver_entry.xml | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'erts/doc') diff --git a/erts/doc/src/driver_entry.xml b/erts/doc/src/driver_entry.xml index 2421e0a8d9..e8c7e26457 100644 --- a/erts/doc/src/driver_entry.xml +++ b/erts/doc/src/driver_entry.xml @@ -196,10 +196,7 @@ typedef struct erl_drv_entry { char **rbuf, ErlDrvSizeT rlen, unsigned int *flags); /* Works mostly like 'control', a synchronous call into the driver */ - void (*event)(ErlDrvData drv_data, ErlDrvEvent event, - ErlDrvEventData event_data); - /* Called when an event selected by - driver_event() has occurred */ + void* unused_event_callback; int extended_marker; /* ERL_DRV_EXTENDED_MARKER */ int major_version; /* ERL_DRV_EXTENDED_MAJOR_VERSION */ int minor_version; /* ERL_DRV_EXTENDED_MINOR_VERSION */ -- cgit v1.2.3 From 300925cc0de95650cf5b13e938ccf702a8eadc9e Mon Sep 17 00:00:00 2001 From: Lukas Larsson Date: Thu, 4 May 2017 17:07:41 +0200 Subject: erts: temp_alloc can no longer be disabled temp_alloc is used in such a way that if it ever results in a malloc/free sequence it will slow down the system alot. So it will no longer be possible to disable it and it will not be disabled when using +Mea min. OTP-14651 --- erts/doc/src/erts_alloc.xml | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'erts/doc') diff --git a/erts/doc/src/erts_alloc.xml b/erts/doc/src/erts_alloc.xml index d3f725ef99..580780e73b 100644 --- a/erts/doc/src/erts_alloc.xml +++ b/erts/doc/src/erts_alloc.xml @@ -87,9 +87,9 @@ the number of system calls made. -

sys_alloc and literal_alloc are always enabled and - cannot be disabled. exec_alloc is only available if it is needed - and cannot be disabled. mseg_alloc is always enabled if it is +

sys_alloc, literal_alloc and temp_alloc are always + enabled and cannot be disabled. exec_alloc is only available if it + is needed and cannot be disabled. mseg_alloc is always enabled if it is available and an allocator that uses it is enabled. All other allocators can be enabled or disabled. By default all allocators are enabled. -- cgit v1.2.3 From 988f5f5e8061ce2e135a314ca782788eda478a06 Mon Sep 17 00:00:00 2001 From: Lukas Larsson Date: Tue, 30 May 2017 16:35:18 +0200 Subject: erts: Move all I/O polling to a seperate thread --- erts/doc/src/erl.xml | 35 +++++++++++++++++++++++++++++------ 1 file changed, 29 insertions(+), 6 deletions(-) (limited to 'erts/doc') diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml index 71fe08d4e6..d24c35d217 100644 --- a/erts/doc/src/erl.xml +++ b/erts/doc/src/erl.xml @@ -762,13 +762,36 @@ process_flag(message_queue_data, MQD).

- + +IOp PollSets -

Enables or disables the kernel poll functionality if supported by - the emulator. Defaults to (disabled). - If the emulator does not support kernel poll, and flag - is passed to the emulator, a warning is - issued at startup.

+

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. +

+ + +IOt PollThreads + +

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. +

+ + +IOPp PollSetsPercentage + +

Similar to +IOp but uses + percentages to set the number of IO pollsets to create, based on the + number of poll threads configured. If both +IOPp and +IOp + are used, +IOPp is ignored. +

+ + +IOPt PollThreadsPercentage + +

Similar to +IOt but uses + percentages to set the number of IO poll threads to create, based on + the number of schedulers configures. If both +IOPt and + +IOt are used, +IOPt is ignored. +

-- cgit v1.2.3 From 22cde2bda706c0bd8574f0a1301170c80b5f4340 Mon Sep 17 00:00:00 2001 From: Lukas Larsson Date: Wed, 19 Jul 2017 11:47:16 +0200 Subject: erts: Remove eager check io It is not longer relevant when using the poll thread --- erts/doc/src/erl.xml | 19 ------------------- erts/doc/src/erlang.xml | 9 --------- 2 files changed, 28 deletions(-) (limited to 'erts/doc') diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml index d24c35d217..dc58cdeb13 100644 --- a/erts/doc/src/erl.xml +++ b/erts/doc/src/erl.xml @@ -1296,25 +1296,6 @@ erlang:system_info(cpu_topology).

 - +secio true|false - -

Enables or disables eager check I/O scheduling. Defaults - to true. The default was changed from false - as from ERTS 7.0. The behavior before this - flag was introduced corresponds to +secio false.

-

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 - true is passed. This, however, also implies that - execution of outstanding I/O operation is not - prioritized to the same extent as when false is - passed.

-

- erlang:system_info(eager_check_io) - returns the value of this parameter used when starting - the virtual machine.

- +sfwi Interval

Sets scheduler-forced wakeup interval. All run queues are diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml index e6b983b6c2..48aac15827 100644 --- a/erts/doc/src/erlang.xml +++ b/erts/doc/src/erlang.xml @@ -8023,15 +8023,6 @@ ok The return value will always be false, as the elib_malloc allocator has been removed.

 - - eager_check_io - -

Returns the value of command-line flag - +secio in - erl(1), which is either true or false. - For information about the different values, see the - documentation of the command-line flag.

- ets_limit

Returns the maximum number of ETS tables allowed. This -- cgit v1.2.3