aboutsummaryrefslogtreecommitdiffstats
path: root/system/doc
diff options
context:
space:
mode:
authorRickard Green <[email protected]>2015-03-20 21:29:30 +0100
committerRickard Green <[email protected]>2015-03-20 21:29:30 +0100
commitf4e3cd1c970cfc5ad54f2ed64832d05749c305d4 (patch)
treea008c88d68c801ac290373920435d952b027905c /system/doc
parentc0d3f4cbb5775a9214366e0d9cb76847d69c3459 (diff)
parente7a713167e3390bfa7d7ada2eafe5fe16f185405 (diff)
downloadotp-f4e3cd1c970cfc5ad54f2ed64832d05749c305d4.tar.gz
otp-f4e3cd1c970cfc5ad54f2ed64832d05749c305d4.tar.bz2
otp-f4e3cd1c970cfc5ad54f2ed64832d05749c305d4.zip
Merge branch 'rickard/time_api/OTP-11997'
* rickard/time_api/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 ... Conflicts: bootstrap/bin/start.boot bootstrap/bin/start_clean.boot bootstrap/lib/compiler/ebin/beam_asm.beam bootstrap/lib/compiler/ebin/compile.beam bootstrap/lib/kernel/ebin/auth.beam bootstrap/lib/kernel/ebin/dist_util.beam bootstrap/lib/kernel/ebin/global.beam bootstrap/lib/kernel/ebin/hipe_unified_loader.beam bootstrap/lib/kernel/ebin/inet_db.beam bootstrap/lib/kernel/ebin/inet_dns.beam bootstrap/lib/kernel/ebin/inet_res.beam bootstrap/lib/kernel/ebin/os.beam bootstrap/lib/kernel/ebin/pg2.beam bootstrap/lib/stdlib/ebin/dets.beam bootstrap/lib/stdlib/ebin/dets_utils.beam bootstrap/lib/stdlib/ebin/erl_tar.beam bootstrap/lib/stdlib/ebin/escript.beam bootstrap/lib/stdlib/ebin/file_sorter.beam bootstrap/lib/stdlib/ebin/otp_internal.beam bootstrap/lib/stdlib/ebin/qlc.beam bootstrap/lib/stdlib/ebin/random.beam bootstrap/lib/stdlib/ebin/supervisor.beam bootstrap/lib/stdlib/ebin/timer.beam erts/aclocal.m4 erts/emulator/beam/bif.c erts/emulator/beam/erl_bif_info.c erts/emulator/beam/erl_db_hash.c erts/emulator/beam/erl_init.c erts/emulator/beam/erl_process.h erts/emulator/beam/erl_thr_progress.c erts/emulator/beam/utils.c erts/emulator/sys/unix/sys.c erts/preloaded/ebin/erlang.beam erts/preloaded/ebin/erts_internal.beam erts/preloaded/ebin/init.beam erts/preloaded/src/erts_internal.erl lib/common_test/test/ct_hooks_SUITE_data/cth/tests/empty_cth.erl lib/diameter/src/base/diameter_lib.erl lib/kernel/src/os.erl lib/ssh/test/ssh_basic_SUITE.erl system/doc/efficiency_guide/advanced.xml
Diffstat (limited to 'system/doc')
-rw-r--r--system/doc/efficiency_guide/advanced.xml29
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>