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| author | Lukas Larsson <[email protected]> | 2014-09-12 16:38:00 +0200 |
|---|---|---|
| committer | Lukas Larsson <[email protected]> | 2016-02-02 10:45:21 +0100 |
| commit | 664ed2a6fd2b324bb6b56db3d3eca853cfda8f61 (patch) | |
| tree | 286743a4b1f794948329961e7f5879b5f54f54a5 /erts/emulator/beam/erl_alloc.types | |
| parent | eea5f896780e07f7ca76685061d01e7be5a7abaa (diff) | |
| download | otp-664ed2a6fd2b324bb6b56db3d3eca853cfda8f61.tar.gz otp-664ed2a6fd2b324bb6b56db3d3eca853cfda8f61.tar.bz2 otp-664ed2a6fd2b324bb6b56db3d3eca853cfda8f61.zip | |
erts: Add microstate accounting
Microstate accounting is a way to track which state the
different threads within ERTS are in. The main usage area
is to pin point performance bottlenecks by checking which
states the threads are in and then from there figuring out
why and where to optimize.
Since checking whether microstate accounting is on or off is
relatively expensive if done in a short loop only a few of the
states are enabled by default and more states can be enabled
through configure.
I've done some benchmarking and the overhead with it turned off
is not noticible and with it on it is a fraction of a percent.
If you enable the extra states, depending on the benchmark,
the ovehead when turned off is about 1% and when turned on
somewhere inbetween 5-15%.
OTP-12345
Diffstat (limited to 'erts/emulator/beam/erl_alloc.types')
| -rw-r--r-- | erts/emulator/beam/erl_alloc.types | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_alloc.types b/erts/emulator/beam/erl_alloc.types index e0bc71c88a..6b7eff1428 100644 --- a/erts/emulator/beam/erl_alloc.types +++ b/erts/emulator/beam/erl_alloc.types @@ -361,6 +361,7 @@ type AINFO_REQ SHORT_LIVED SYSTEM alloc_info_request type SCHED_WTIME_REQ SHORT_LIVED SYSTEM sched_wall_time_request type GC_INFO_REQ SHORT_LIVED SYSTEM gc_info_request type PORT_DATA_HEAP STANDARD SYSTEM port_data_heap +type MSACC LONG_LIVED SYSTEM microstate_accounting # # Types used by system specific code |