Naturally i want to bench.

But i cant upload some benches, because CPU / GPU are not in Database. HWBot Prime works, but no validation, because no CPU found.

Any Chance to update the Database and Hwbot Prime?

Has the Android 4.2 OS that it came with, the CPU is an Allwinner A31S Quad core.

Here's a link to the tablet in question:

http://www.dbpow.com/dbpad.html

Information on this one has been all but non-existant but if anyone does know where I can get what I need to root the tablet, it would be most appreciated.

Thanks!

• love overclocking
  
• know tricks for Raspberry Pi
  
• want to see people get the most out of their Pi
  
• are okay with the English language
  
• have an infinite amount of patience and understanding
  

... you are the man or woman for this position!

Give me a shout via PM and we'll take it from there!

The first tweak will be to turn off everything which is not necessary (like sound and network if you don't want to watch youtube). Type

$ ps -ef

to see which processes are running.

Now type the following to enter runlevel 1:

$ sudo init 1

The Linux OS is now in single user mode and only processes which are necessary to keep the OS running are running.

$ ps -ef

Next, start the Benchmark and use the second tweak. I changed process priority to use the processor more efficiently. This can be done with the command "nice".

$ nice -n 19 java -jar hwbotprime.jar

You can adjust the priority with the parameter -n. Values range is from -20 (most favorable to the process) to 19 (least favorable to the process). To get more information read the manual page of nice with the command "man nice". It's strange to me that the score is higher with a lower priority, but I think this is because the linux OS and the java runtime environment are running faster then and the benchmark doesn't have to wait for them.

The score I get after the bechmark is somtimes very different. I get results under 720PPS but for example after seven runs suddenly I have a score around 730PPS once. My third tweak was a short shell script, which runs the benchmark in a loop and saves every score. I can choose the highest score in the end.

Save this code in a new file named bench.sh.

#!/bin/bash
for (( c=1; ; c++ ))
do
vcgencmd measure_temp
echo $c > keys
echo "q" >> keys
nice -n 19 java -jar /home/pi/hwbotprime.jar < keys > log.txt 2>&1
done

Make the script executable

$ chmod +x bench.sh

and execute it.

$ ./bench.sh

After you stopped that script with CTRL-C you can analyse your score with the following command.

$ cat log.txt | grep "Score:" | grep -n "Score:"

The numbers in front of the lines represent the file for that benchmark run. So "3:Score: 716.65" is file 3.hwbot.

I found other tweaks in the Internet but they don't boost my RPi very much.

http://magikh0e.ihtb.org/pubPapers/Raspberry.Pi.Hacking.pdf page 4 - 10

Of course I also overclocked my RPi. Here are my settings in the config.txt:

arm_freq=1170
core_freq=600
avoid_pwm_pll_1
current_limit_override=0x5A00020
sdram_freq=700
over_voltage_sdram=8
over_voltage=8
force_turbo=1

over_voltage_sdram and over_voltage are limited to 8 as you might know.

But core_freq is also limited. http://www.raspberrypi.org/phpBB3/viewtopic.php?f=63&t=52422&p=410136#p410136

You can try that by setting core_freq to 600 and measure the clock with the command

$ vcgencmd measure_clock core

Then set core_freq to 601 and type the command again. You will get a clock of 500 not 601 !

BTW, with the vcgencmd command you can do complete monitoring of your Pi. More here: http://elinux.org/RPi_vcgencmd_usage

Here is a script for monitor the RPi:

#!/bin/bash
for src in arm core h264 isp v3d uart pwm emmc pixel vec hdmi dpi ; do \
echo -e "$src:\t$(vcgencmd measure_clock $src)" ; \
done
for id in core sdram_c sdram_i sdram_p ; do \
echo -e "$id:\t$(vcgencmd measure_volts $id)" ; \
done
echo -e "temperature:\t$(vcgencmd measure_temp)"
for codec in H264 MPG2 WVC1 MPG4 MJPG WMV9 ; do \
echo -e "$codec:\t$(vcgencmd codec_enabled $codec)" ; \
done
echo ""
echo "config.txt Settings:"
vcgencmd get_config int
echo ""
echo "Memory split:"
vcgencmd get_mem arm
vcgencmd get_mem gpu

What about EPower? I saw that hardware mod with L5 Inductor.

SPECIFICATIONS

• Low-cost development platform
  
• Ultra compact size with full metal enclosure
  
• Quad core ARM Cortex-A9 MPCore
  
• Samsung Exynos4412 Prime Cortex-A9 Quad Core 1.7Ghz with 1MB L2 cache
  
• 2048MB(2GB) LP-DDR2 880 Mega data rate
  
• Mali-400 Quad Core 440MHz
  
• 10/100Mbps Ethernet with RJ-45 LAN Jack
  
• 2 x High speed USB2.0 Host port
  
• Audio codec with headphone jack on board
  
• Android 4.x & Ubuntu 12.10
  
• Community-driven projects & supports
  

The specs are pretty much those of a Galaxy S3 with higher core clock. Or the one of a Note II with lower GPU clock. It's a quad core, so it should be quite a bit faster than the Raspberry Pi. I'll be running HWBOT Prime and the OpenArena benchmark to see how it performs. Not sure if it can be overclocked

Some pictures:

So in the Raspberry Pi overclocking guide I published last weekend you can only find a run-down for 3D benching with HWBOT Prime. Of course the Raspberry Pi can also do 3D overclocking! So of course we want this too. So far there are not really any decent 3D benchmarks out there for ARM-based Linux devices, so we will have to stick with our regular game benchmarks. In this thread I will help you install the OpenArena benchmark. OpenArena is based on the Quake3 engine, so benchmarking is pretty much like it was ten years ago .

1) Install Openarena

Log in to your Raspberry Pi, stay in command mode. Then run the following commands:

$ sudo apt-get install openarena
$ wget http://www.berryterminal.com/dl/ioquake3_99.1.36-rpi01_armhf.deb
$ sudo dpkg -i ./ioquake3_99.1.36-rpi01_armhf.deb

The total filesize is about 700MB, so make sure you have enough space. Normally, the download packages will remain on your SD card unless you delete them yourself. You can use this command to remove the files. Don't worry, you don't need them anymore.

$ sudo apt-get clean

After this, you have installed OpenArena.

2) Benchmarking

Again, stay in command mode and run the following command to start OpenArena.

$ sudo /usr/games/openarena

The game will load now. If you were aware during the '90s you will surely recognise the interface. Now, to benchmark use the default config settings and default demo. To start the benchmark, use the following commands in the console. To enable console, press '~'.

timedemo 1 (enables benchmark mode)
cg_drawfps 1 (shows fps when benchmarking)
demo demo001_test1 (loads demo map)

Just wait until it's finished. On my default Raspberry Pi (700arm, 250gpu) it took 434.8 seconds to render 3398 frames at 7.8 fps. 7min 14.6s is a great time for Haswell 4G 32M, but horribly long for a 3D benchmark. So be prepared.

Results (arm/core/gpu/sdram):

• 7.8FPS at 700/250/250/500
  
• 13.2FPS at 1000/500/300/575
  
• 15.2FPS at 1050/550/350/600
  
• 15.5FPS at 1100/550/375/600
  

Enjoy!

Sources

- http://www.raspberrypi.org/phpBB3/viewtopic.php?f=35&t=8673&sid=01dcd4952ec1ce854d1367642f155265&start=25

- http://openarena.wikia.com/wiki/index.php?search=benchmark&fulltext=Search&ab=38%2C46