X-Git-Url: https://git.sesse.net/?p=stockfish;a=blobdiff_plain;f=Readme.md;h=35ff095d6792857cc8db58ba84c734aaeba52644;hp=10ffdeae4ff34736171eed3b5155812d8f443487;hb=20ceeac8b3a3bd13a64d6a224ef190d6cdd94f63;hpb=0dbc72d82e7f5f314499b22a04dcef45edcdba9a

diff --git a/Readme.md b/Readme.md
index 10ffdeae..35ff095d 100644
--- a/Readme.md
+++ b/Readme.md
@@ -42,7 +42,7 @@ Currently, Stockfish has the following UCI options:
     this equal to the number of CPU cores available.
 
   * #### Hash
-    The size of the hash table in MB.
+    The size of the hash table in MB. It is recommended to set Hash after setting Threads.
 
   * #### Clear Hash
     Clear the hash table.
@@ -138,6 +138,30 @@ more compact than Nalimov tablebases, while still storing all information
 needed for optimal play and in addition being able to take into account
 the 50-move rule.
 
+## Large Pages
+
+Stockfish supports large pages on Linux and Windows. Large pages make
+the hash access more efficient, improving the engine speed, especially
+on large hash sizes. Typical increases are 5..10% in terms of nps, but
+speed increases up to 30% have been measured. The support is
+automatic. Stockfish attempts to use large pages when available and
+will fall back to regular memory allocation when this is not the case.
+
+### Support on Linux
+
+Large page support on Linux is obtained by the Linux kernel
+transparent huge pages functionality. Typically, transparent huge pages
+are already enabled and no configuration is needed.
+
+### Support on Windows
+
+The use of large pages requires "Lock Pages in Memory" privilege. See
+[Enable the Lock Pages in Memory Option (Windows)](https://docs.microsoft.com/en-us/sql/database-engine/configure-windows/enable-the-lock-pages-in-memory-option-windows)
+on how to enable this privilege. Logout/login may be needed
+afterwards. Due to memory fragmentation, it may not always be
+possible to allocate large pages even when enabled. A reboot
+might alleviate this problem. To determine whether large pages
+are in use, see the engine log.
 
 ## Compiling Stockfish yourself from the sources
 
@@ -153,6 +177,14 @@ compile (for instance with Microsoft MSVC) you need to manually
 set/unset some switches in the compiler command line; see file *types.h*
 for a quick reference.
 
+When reporting an issue or a bug, please tell us which version and
+compiler you used to create your executable. These informations can
+be found by typing the following commands in a console:
+
+```
+    ./stockfish
+    compiler
+```
 
 ## Understanding the code base and participating in the project
 
@@ -162,12 +194,12 @@ community effort. There are a few ways to help contribute to its growth.
 ### Donating hardware
 
 Improving Stockfish requires a massive amount of testing. You can donate
-your hardware resources by installing the [Fishtest Worker](https://github.com/glinscott/fishtest/wiki/Running-the-worker)
-and view the current tests on [Fishtest](http://tests.stockfishchess.org/tests).
+your hardware resources by installing the [Fishtest Worker](https://github.com/glinscott/fishtest/wiki/Running-the-worker:-overview)
+and view the current tests on [Fishtest](https://tests.stockfishchess.org/tests).
 
 ### Improving the code
 
-If you want to help improve the code, there are several valuable ressources:
+If you want to help improve the code, there are several valuable resources:
 
 * [In this wiki,](https://www.chessprogramming.org) many techniques used in
 Stockfish are explained with a lot of background information.
@@ -179,7 +211,7 @@ Nevertheless, a helpful resource.
 
 * The latest source can always be found on [GitHub](https://github.com/official-stockfish/Stockfish).
 Discussions about Stockfish take place in the [FishCooking](https://groups.google.com/forum/#!forum/fishcooking)
-group and engine testing is done on [Fishtest](http://tests.stockfishchess.org/tests).
+group and engine testing is done on [Fishtest](https://tests.stockfishchess.org/tests).
 If you want to help improve Stockfish, please read this [guideline](https://github.com/glinscott/fishtest/wiki/Creating-my-first-test)
 first, where the basics of Stockfish development are explained.