doc: Remove obsolete README.440-DDR-performance file

The PPC 440 support has been removed in commit 98f705c9cefd
("powerpc: remove 4xx support") already, so this file is
certainly not required anymore.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Stefan Roese <sr@denx.de>

diff --git a/doc/README.440-DDR-performance b/doc/README.440-DDR-performance
deleted file mode 100644 (file)
index 66b97bc..0000000
--- a/doc/README.440-DDR-performance
+++ /dev/null
@@ -1,90 +0,0 @@
-AMCC suggested to set the PMU bit to 0 for best performace on the
-PPC440 DDR controller. The 440er common DDR setup files (sdram.c &
-spd_sdram.c) are changed accordingly. So all 440er boards using
-these setup routines will automatically receive this performance
-increase.
-
-Please see below some benchmarks done by AMCC to demonstrate this
-performance changes:
-
-
-----------------------------------------
-SDRAM0_CFG0[PMU] = 1 (U-Boot default for Bamboo, Yosemite and Yellowstone)
-----------------------------------------
-Stream benchmark results
--------------------------------------------------------------
-This system uses 8 bytes per DOUBLE PRECISION word.
--------------------------------------------------------------
-Array size = 2000000, Offset = 0
-Total memory required = 45.8 MB.
-Each test is run 10 times, but only
-the *best* time for each is used.
--------------------------------------------------------------
-Your clock granularity/precision appears to be 1 microseconds.
-Each test below will take on the order of 112345 microseconds.
-   (= 112345 clock ticks)
-Increase the size of the arrays if this shows that you are not getting
-at least 20 clock ticks per test.
--------------------------------------------------------------
-WARNING -- The above is only a rough guideline.
-For best results, please be sure you know the precision of your system
-timer.
--------------------------------------------------------------
-Function      Rate (MB/s)   RMS time     Min time     Max time
-Copy:         256.7683       0.1248       0.1246       0.1250
-Scale:        246.0157       0.1302       0.1301       0.1302
-Add:          255.0316       0.1883       0.1882       0.1885
-Triad:        253.1245       0.1897       0.1896       0.1899
-
-
-TTCP Benchmark Results
-ttcp-t: socket
-ttcp-t: connect
-ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5000  tcp  ->
-localhost
-ttcp-t: 16777216 bytes in 0.28 real seconds = 454.29 Mbit/sec +++
-ttcp-t: 2048 I/O calls, msec/call = 0.14, calls/sec = 7268.57
-ttcp-t: 0.0user 0.1sys 0:00real 60% 0i+0d 0maxrss 0+2pf 3+1506csw
-
-----------------------------------------
-SDRAM0_CFG0[PMU] = 0 (Suggested modification)
-Setting PMU = 0 provides a noticeable performance improvement *2% to
-5% improvement in memory performance.
-*Improves the Mbit/sec for TTCP benchmark by almost 76%.
-----------------------------------------
-Stream benchmark results
--------------------------------------------------------------
-This system uses 8 bytes per DOUBLE PRECISION word.
--------------------------------------------------------------
-Array size = 2000000, Offset = 0
-Total memory required = 45.8 MB.
-Each test is run 10 times, but only
-the *best* time for each is used.
--------------------------------------------------------------
-Your clock granularity/precision appears to be 1 microseconds.
-Each test below will take on the order of 120066 microseconds.
-   (= 120066 clock ticks)
-Increase the size of the arrays if this shows that you are not getting
-at least 20 clock ticks per test.
--------------------------------------------------------------
-WARNING -- The above is only a rough guideline.
-For best results, please be sure you know the precision of your system
-timer.
--------------------------------------------------------------
-Function      Rate (MB/s)   RMS time     Min time     Max time
-Copy:         262.5167       0.1221       0.1219       0.1223
-Scale:        258.4856       0.1238       0.1238       0.1240
-Add:          262.5404       0.1829       0.1828       0.1831
-Triad:        266.8594       0.1800       0.1799       0.1802
-
-TTCP Benchmark Results
-ttcp-t: socket
-ttcp-t: connect
-ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5000  tcp  ->
-localhost
-ttcp-t: 16777216 bytes in 0.16 real seconds = 804.06 Mbit/sec +++
-ttcp-t: 2048 I/O calls, msec/call = 0.08, calls/sec = 12864.89
-ttcp-t: 0.0user 0.0sys 0:00real 46% 0i+0d 0maxrss 0+2pf 120+1csw
-
-
-2006-07-28, Stefan Roese <sr@denx.de>