From 2ea5944504695496e2d8d0364ead14e871c71870 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bj=C3=B6rn=20Gustavsson?= Date: Tue, 16 May 2017 09:22:02 +0200 Subject: Update instructions for how to start the lock-counting VM --- lib/tools/doc/src/lcnt_chapter.xml | 26 ++++++++------------------ 1 file changed, 8 insertions(+), 18 deletions(-) (limited to 'lib/tools') diff --git a/lib/tools/doc/src/lcnt_chapter.xml b/lib/tools/doc/src/lcnt_chapter.xml index 6cfdb5cf1b..362f212963 100644 --- a/lib/tools/doc/src/lcnt_chapter.xml +++ b/lib/tools/doc/src/lcnt_chapter.xml @@ -48,29 +48,19 @@

Enabling lock-counting -

For investigation of locks in the emulator we use an internal tool called lcnt (short for lock-count). The VM needs to be compiled with this option enabled. To enable this, use:

+

For investigation of locks in the emulator we use an internal tool called lcnt (short for lock-count). The VM needs to be compiled with this option enabled. + To compile a lock-counting VM along with a normal VM, use:

 cd $ERL_TOP
-./configure --enable-lock-counter
-
- -

- Another way to enable this alongside a normal VM is to compile it at emulator directory level, much like a debug build. To compile it this way do the following, -

- 
-cd $ERL_TOP/erts/emulator
-make lcnt FLAVOR=smp
-
-

and then starting Erlang with,

+./configure --enable-lock-counter +

Start the lock-counting VM like this:

-$ERL_TOP/bin/cerl -lcnt
-
-

To verify that you lock-counting enabled check that [lock-counting] appears in the status text when the VM is started.

+$ERL_TOP/bin/erl -emu_type lcnt +

To verify that lock counting is enabled check that [lock-counting] appears in the status text when the VM is started.

-Erlang R13B03 (erts-5.7.4) [source] [64-bit] [smp:8:8] [rq:8] [async-threads:0] [hipe]
- [kernel-poll:false] [lock-counting]
-
+Erlang/OTP 20 [erts-9.0] [64-bit] [smp:8:8] [ds:8:8:10] [async-threads:10] [hipe] + [kernel-poll:false] [lock-counting]
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