From f278cee87dd7ef929a64b411b4e83c3d7028687a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?John=20H=C3=B6gberg?= <john@erlang.org>
Date: Fri, 23 Mar 2018 13:15:08 +0100
Subject: Add +sbwt/+swt analogues for dirty schedulers

Sharing these settings for all schedulers can degrade performance,
so it makes sense to be able to configure them separately.

This also changes the default busy-wait time to "short" for both
kinds of dirty schedulers.
---
 erts/doc/src/erl.xml | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'erts/doc/src/erl.xml')

diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml
index 00dec37590..5089d4e0ce 100644
--- a/erts/doc/src/erl.xml
+++ b/erts/doc/src/erl.xml
@@ -1155,6 +1155,26 @@
                 without prior notice.</p>
             </note>
           </item>
+          <tag><marker id="+sbwtdcpu"/>
+            <c>+sbwtdcpu none|very_short|short|medium|long|very_long</c></tag>
+          <item>
+            <p>As <seealso marker="+sbwt"><c>+sbwt</c></seealso> but affects
+              dirty CPU schedulers. Defaults to <c>short</c>.</p>
+            <note>
+              <p>This flag can be removed or changed at any time
+                without prior notice.</p>
+            </note>
+          </item>
+          <tag><marker id="+sbwtdio"/>
+            <c>+sbwtdio none|very_short|short|medium|long|very_long</c></tag>
+          <item>
+            <p>As <seealso marker="+sbwt"><c>+sbwt</c></seealso> but affects
+              dirty IO schedulers. Defaults to <c>short</c>.</p>
+            <note>
+              <p>This flag can be removed or changed at any time
+                without prior notice.</p>
+            </note>
+          </item>
 <tag><marker id="+scl"/><c>+scl true|false</c></tag>
           <item>
             <p>Enables or disables scheduler compaction of load. By default
@@ -1420,6 +1440,26 @@
                 notice.</p>
             </note>
           </item>
+          <tag><marker id="+swtdcpu"/>
+            <c>+swtdcpu very_low|low|medium|high|very_high</c></tag>
+          <item>
+            <p>As <seealso marker="+swt"><c>+swt</c></seealso> but
+              affects dirty CPU schedulers. Defaults to <c>medium</c>.</p>
+            <note>
+              <p>This flag can be removed or changed at any time
+                without prior notice.</p>
+            </note>
+          </item>
+          <tag><marker id="+swtdio"/>
+            <c>+swtdio very_low|low|medium|high|very_high</c></tag>
+          <item>
+            <p>As <seealso marker="+swt"><c>+swt</c></seealso> but affects
+              dirty IO schedulers. Defaults to <c>medium</c>.</p>
+            <note>
+              <p>This flag can be removed or changed at any time
+                without prior notice.</p>
+            </note>
+          </item>
         </taglist>
       </item>
       <tag><marker id="+t"/><c><![CDATA[+t size]]></c></tag>
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