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authorWilliam Wilgus <wilgus.william@gmail.com>2020-10-05 03:28:02 -0400
committerWilliam Wilgus <wilgus.william@gmail.com>2020-10-05 11:53:27 -0400
commitef34126913978c7cd6e5b0831f78ac8355f053f0 (patch)
tree4a719e60a52d19031ed485d8c9e9fd64e446ef97 /apps/plugins/lua_scripts/memchk.lua
parent74258fca311b2d7e9d834ab8607f2bd326f67807 (diff)
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lua add better memory stats
lua gives you a memory used number that only reflects the current allocations if fact it doesn't even give you a way to get the amount of ram free rb.mem_stats() seeks to fill this gap by marking the memory allocated for lua with a sentinel value which can later be checked to get a high water mark of the ram used by lua and a pretty good idea of how much ram is available Also includes an example script usage: used, allocd, free = rb.mem_stats() Change-Id: Ia282869f989848324d7d88c7df4827fdbce4fb4e
Diffstat (limited to 'apps/plugins/lua_scripts/memchk.lua')
-rw-r--r--apps/plugins/lua_scripts/memchk.lua32
1 files changed, 32 insertions, 0 deletions
diff --git a/apps/plugins/lua_scripts/memchk.lua b/apps/plugins/lua_scripts/memchk.lua
new file mode 100644
index 0000000000..f7619fe3dd
--- /dev/null
+++ b/apps/plugins/lua_scripts/memchk.lua
@@ -0,0 +1,32 @@
+--[[
+ __________ __ ___.
+ Open \______ \ ____ ____ | | _\_ |__ _______ ___
+ Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
+ Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
+ Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
+ \/ \/ \/ \/ \/
+ $Id$
+ Example Lua Memory Use
+ Copyright (C) 2020 William Wilgus
+ This program is free software; you can redistribute it and/or
+ modify it under the terms of the GNU General Public License
+ as published by the Free Software Foundation; either version 2
+ of the License, or (at your option) any later version.
+ This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ KIND, either express or implied.
+]]--
+
+local used, allocd, free = rb.mem_stats()
+local lu = collectgarbage("count")
+local fmt = function(t, v) return string.format("%s: %d Kb\n", t, v /1024) end
+
+-- this is how lua recommends to concat strings rather than ..
+local s_t = {}
+s_t[1] = "rockbox:\n"
+s_t[2] = fmt("Used ", used)
+s_t[3] = fmt("Allocd ", allocd)
+s_t[4] = fmt("Free ", free)
+s_t[5] = "\nlua:\n"
+s_t[6] = fmt("Used", lu * 1024)
+s_t[7] = "\n\nNote that the rockbox used count is a high watermark"
+rb.splash_scroller(10 * rb.HZ, table.concat(s_t))