From ef0cc085adcb444e5d09faffde4c04d3b4894aea Mon Sep 17 00:00:00 2001
From: Thomas Martitz <kugel@rockbox.org>
Date: Sat, 3 Apr 2010 14:04:50 +0000
Subject: Memory benchmark plugin. Tests memory speeds and prints the kB/s.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25450 a1c6a512-1295-4272-9138-f99709370657
---
 apps/plugins/CATEGORIES |  1 +
 apps/plugins/test_mem.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 99 insertions(+)
 create mode 100644 apps/plugins/test_mem.c

diff --git a/apps/plugins/CATEGORIES b/apps/plugins/CATEGORIES
index f61ff9b69f..f797c4038d 100644
--- a/apps/plugins/CATEGORIES
+++ b/apps/plugins/CATEGORIES
@@ -100,6 +100,7 @@ stats,apps
 stopwatch,apps
 sudoku,games
 test_boost,apps
+test_mem,apps
 test_codec,viewers
 test_disk,apps
 test_fps,apps
diff --git a/apps/plugins/test_mem.c b/apps/plugins/test_mem.c
new file mode 100644
index 0000000000..bd9c86a0a5
--- /dev/null
+++ b/apps/plugins/test_mem.c
@@ -0,0 +1,98 @@
+/***************************************************************************
+*             __________               __   ___.
+*   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+*   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+*   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+*   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+*                     \/            \/     \/    \/            \/
+* $Id$
+*
+* Copyright (C) 2010 Thomas Martitz
+*
+* 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.
+*
+****************************************************************************/
+
+#include "plugin.h"
+
+PLUGIN_HEADER
+
+#define BUF_SIZE ((PLUGIN_BUFFER_SIZE-(10<<10)) / (sizeof(int)))
+#define LOOP_REPEAT 8
+static volatile int buf[BUF_SIZE];
+#define KB_PER_SEC(delta) ((BUF_SIZE*sizeof(buf[0])*LOOP_REPEAT/delta) >> 10)
+
+enum plugin_status plugin_start(const void* parameter)
+{
+    (void)parameter;
+    bool done = false;
+    bool boost = false;
+    int count = 0;
+    int last_tick = 0;
+
+    rb->lcd_setfont(FONT_SYSFIXED);
+
+    while (!done)
+    {
+        unsigned i, j;
+        int line = 0;
+        int x;
+        int delta;
+        last_tick = *rb->current_tick;
+
+        for(i = 0; i < LOOP_REPEAT; i++)
+        {
+            for (j = 0; j < BUF_SIZE; j++)
+                buf[j] = j;
+        }
+        rb->screens[0]->clear_display();
+        rb->screens[0]->putsf(0, line++, "%s", boost?"boosted":"unboosted");
+        rb->screens[0]->putsf(0, line++, "bufsize: %u", BUF_SIZE*sizeof(buf[0]));
+        rb->screens[0]->putsf(0, line++, "loop#: %d", ++count);
+        delta = *rb->current_tick - last_tick;
+        rb->screens[0]->putsf(0, line++, "write ticks: %d (%d kB/s)", delta,
+                              KB_PER_SEC(delta));
+        last_tick = *rb->current_tick;
+        for(i = 0; i < LOOP_REPEAT; i++)
+        {
+            for(j = 0; j < BUF_SIZE; j++)
+                x = buf[j];
+        }
+        delta = *rb->current_tick - last_tick;
+        rb->screens[0]->putsf(0, line++, "read ticks: %d (%d kB/s)", delta,
+                              KB_PER_SEC(delta));
+        rb->screens[0]->update();
+
+        int button = rb->button_get(false);
+        switch (button)
+        {
+            case BUTTON_UP:
+                if (!boost)
+                {
+                    rb->cpu_boost(true);
+                    boost = true;
+                }
+                break;
+
+            case BUTTON_DOWN:
+                if (boost)
+                {
+                    rb->cpu_boost(false);
+                    boost = false;
+                }
+                break;
+
+            case BUTTON_LEFT:
+                done = true;
+                break;
+        }
+    }
+
+    return PLUGIN_OK;
+}
-- 
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