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| author | Rickard Green <[email protected]> | 2015-03-20 21:37:15 +0100 |
|---|---|---|
| committer | Rickard Green <[email protected]> | 2015-03-20 21:37:15 +0100 |
| commit | 6642d62c071f94d3e76254453099e2df01f7ad0e (patch) | |
| tree | bb7acaeb1710092da6257ac3abd937bce67e394d /system | |
| parent | 74099492bee421c4829537bca3c4bc0c4fbec031 (diff) | |
| parent | f4e3cd1c970cfc5ad54f2ed64832d05749c305d4 (diff) | |
| download | otp-6642d62c071f94d3e76254453099e2df01f7ad0e.tar.gz otp-6642d62c071f94d3e76254453099e2df01f7ad0e.tar.bz2 otp-6642d62c071f94d3e76254453099e2df01f7ad0e.zip | |
Merge branch 'rickard/time_api/master/OTP-11997'
* rickard/time_api/master/OTP-11997: (22 commits)
Update primary bootstrap
inets: Suppress deprecated warning on erlang:now/0
inets: Cleanup of multiple copies of functions Add inets_lib with common functions used by multiple modules
inets: Update comments
Suppress deprecated warning on erlang:now/0
Use new time API and be back-compatible in inets Remove unused functions and removed redundant test
asn1 test SUITE: Eliminate use of now/0
Disable deprecated warning on erlang:now/0 in diameter_lib
Use new time API and be back-compatible in ssh
Replace all calls to now/0 in CT with new time API functions
test_server: Replace usage of erlang:now() with usage of new API
Replace usage of erlang:now() with usage of new API
Replace usage of erlang:now() with usage of new API
Replace usage of erlang:now() with usage of new API
Replace usage of erlang:now() with usage of new API
otp_SUITE: Warn for calls to erlang:now/0
Replace usage of erlang:now() with usage of new API
Multiple timer wheels
Erlang based BIF timer implementation for scalability
Implement ethread events with timeout
...
Diffstat (limited to 'system')
| -rw-r--r-- | system/doc/efficiency_guide/advanced.xml | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/system/doc/efficiency_guide/advanced.xml b/system/doc/efficiency_guide/advanced.xml index 3513a91e34..df2ab0f811 100644 --- a/system/doc/efficiency_guide/advanced.xml +++ b/system/doc/efficiency_guide/advanced.xml @@ -238,6 +238,35 @@ <cell>Number of arguments to a function or fun</cell> <cell>255</cell> </row> + <row> + <cell><marker id="unique_references"/>Unique References on a Runtime System Instance</cell> + <cell>Each scheduler thread has its own set of references, and all + other threads have a shared set of references. Each set of references + consist of <c>2⁶⁴ - 1</c> unique references. That is the total + amount of unique references that can be produced on a runtime + system instance is <c>(NoSchedulers + 1) * (2⁶⁴ - 1)</c>. If a + scheduler thread create a new reference each nano second, + references will at earliest be reused after more than 584 years. + That is, for the foreseeable future they are unique enough.</cell> + </row> + <row> + <cell><marker id="unique_integers"/>Unique Integers on a Runtime System Instance</cell> + <cell>There are two types of unique integers both created using the + <seealso marker="erts:erlang#unique_integer/1">erlang:unique_integer()</seealso> + BIF. Unique integers created: + <taglist> + <tag>with the <c>monotonic</c> modifier</tag> + <item>consist of a set of <c>2⁶⁴ - 1</c> unique integers.</item> + <tag>without the <c>monotonic</c> modifier</tag> + <item>consist of a set of <c>2⁶⁴ - 1</c> unique integers per scheduler + thread and a set of <c>2⁶⁴ - 1</c> unique integers shared by + other threads. That is the total amount of unique integers without + the <c>monotonic</c> modifier is <c>(NoSchedulers + 1) * (2⁶⁴ - 1)</c></item> + </taglist> + If a unique integer is created each nano second, unique integers + will at earliest be reused after more than 584 years. That is, for + the foreseeable future they are unique enough.</cell> + </row> <tcaption>System Limits</tcaption> </table> </section> |