jamesh
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Re: Raspberry Pi vs. Beagle Bone Black

Tue Apr 30, 2013 4:51 pm

Mortimer wrote:I've been there too jamesh. I spent two months there in 2008, separated by a few weeks.

I tried dog, unknowingly. My hosts considered it some sort of honour to take their guests to a very expensive restaurant on the last day. They didn't however tell me, and I only found out a few months later when our in country rep' told me. I recall the meal was actually rather good, whether or not I should admit that I don't know.

Nothing changes there, more or less as soon as I arrived the north took pot shots at some southern fishing boats and lobbed a few missiles in an easterly direction.
This is my 5th trip in the last 10 months. Joy. Not tried dog yet although did has some just about edible BBQ'd eels the other day. And yes Pluggy, I'm still up! Still, its a public holiday tomorrow, so don't need to turn up at the office until a bit later than usual, and no customer site visit to worry about.

Haven't had any close up views of nuclear explosions yet, for which I'm sure my other half and children are eternally grateful! I expect they've been winding up the madman just to see what happens.
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Re: Raspberry Pi vs. Beagle Bone Black

Tue Apr 30, 2013 5:53 pm

How are you enjoying the Soju?
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liz
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Re: Raspberry Pi vs. Beagle Bone Black

Tue Apr 30, 2013 7:03 pm

The really important thing to remember here is that poor James REALLY HATES KIMCHEE.
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Mortimer
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Re: Raspberry Pi vs. Beagle Bone Black

Tue Apr 30, 2013 8:36 pm

Kimchee is OK, but I'm not sure about having for breakfast like the Koreans do! That and raw garlic with EVERY meal, including breakfast!
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Re: Raspberry Pi vs. Beagle Bone Black

Tue Apr 30, 2013 9:40 pm

Sheltered existence, had to look up what kimchee is..........

Does it go with fish and chips ? :)
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Re: Raspberry Pi vs. Beagle Bone Black

Tue Apr 30, 2013 9:51 pm

Mortimer wrote:I tried dog, unknowingly. My hosts considered it some sort of honour to take their guests to a very expensive restaurant on the last day. They didn't however tell me, and I only found out a few months later when our in country rep' told me. I recall the meal was actually rather good, whether or not I should admit that I don't know.
a friend of mine once told me pretty much the same thing - he went to some fancy korean wedding and had a lovely meal, couldn't help but wonder where the pet dog went though. turned out it wasn't the pet, the family had just tied up the dog they had selected from the butcher!

and kim chee, like all cabbage dishes, you can keep, i'd prefer the dog!

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Re: Raspberry Pi vs. Beagle Bone Black

Wed May 01, 2013 2:52 am

How do you hate kimchee? Kimchee soup is my favorite Korean food. Eel is good eats as well. Soak it in.

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Re: Raspberry Pi vs. Beagle Bone Black

Fri May 03, 2013 7:07 pm

Back to the Beaglebone Black, I just received an email from Farnell saying they just shipped mine.

Maybe Monday.......
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Re: Raspberry Pi vs. Beagle Bone Black

Fri May 03, 2013 7:18 pm

pluggy wrote:Back to the Beaglebone Black, I just received an email from Farnell saying they just shipped mine.

Maybe Monday.......
Mine too!
Looking forward to tinkering with it..

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Re: Raspberry Pi vs. Beagle Bone Black

Sat May 04, 2013 12:21 pm

Maybe not Monday, it arrived this morning. It does indeed just work out of the box - connect it to your PC with the supplied mini USB cable, I have one permanently connected to the computer for Digital Cameras and USB hard drives, I just plugged it into that, it sets itself up and adds a storage device. Access an .htm file on the storage and it tells you how to continue. On Ubuntu the tcp/ip over USB just works, with Windoze you install drivers from the storage device. SSH is already to go. The Pi should have been this painless to get going. I'll have a bit of work to do to get it going as a true headless. But first light is dead easy. No surprises with the installed linux, it works as I'd expect so far.

Code: Select all

[email protected]:~# cat /proc/cpuinfo 
processor	: 0
model name	: ARMv7 Processor rev 2 (v7l)
BogoMIPS	: 297.40
Features	: swp half thumb fastmult vfp edsp thumbee neon vfpv3 tls 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x3
CPU part	: 0xc08
CPU revision	: 2

Hardware	: Generic AM33XX (Flattened Device Tree)
Revision	: 0000
Serial		: 0000000000000000
[email protected]:~# top

top - 12:12:28 up 31 min,  2 users,  load average: 0.02, 0.10, 0.15
Tasks:  94 total,   1 running,  93 sleeping,   0 stopped,   0 zombie
Cpu(s): 10.0%us, 13.3%sy,  0.0%ni, 76.7%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:    510644k total,   214024k used,   296620k free,    17740k buffers
Swap:        0k total,        0k used,        0k free,    97392k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND            
  664 root      20   0  2600 1132  896 R 23.3  0.2   0:00.60 top                
   10 root      20   0     0    0    0 S  3.3  0.0   0:00.90 rcu_sched          
  652 root      20   0  3028 1360 1068 S  3.3  0.3   0:02.03 dropbear           
    1 root      20   0  4768 2636 1724 S  0.0  0.5   0:00.88 systemd            
    2 root      20   0     0    0    0 S  0.0  0.0   0:00.00 kthreadd           
    3 root      20   0     0    0    0 S  0.0  0.0   0:00.00 ksoftirqd/0        
    5 root       0 -20     0    0    0 S  0.0  0.0   0:00.00 kworker/0:0H       
    7 root       0 -20     0    0    0 S  0.0  0.0   0:00.00 kworker/u:0H       
    8 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 migration/0        
    9 root      20   0     0    0    0 S  0.0  0.0   0:00.00 rcu_bh             
   11 root      RT   0     0    0    0 S  0.0  0.0   0:00.03 watchdog/0         
   12 root       0 -20     0    0    0 S  0.0  0.0   0:00.00 khelper            
   13 root      20   0     0    0    0 S  0.0  0.0   0:00.00 kdevtmpfs          
   14 root       0 -20     0    0    0 S  0.0  0.0   0:00.00 netns              
   15 root      20   0     0    0    0 S  0.0  0.0   0:01.70 kworker/0:1        
   16 root      20   0     0    0    0 S  0.0  0.0   0:00.00 bdi-default        
   17 root       0 -20     0    0    0 S  0.0  0.0   0:00.00 kintegrityd        
[email protected]:~# uname -a
Linux beaglebone 3.8.6 #1 SMP Sat Apr 13 09:10:52 CEST 2013 armv7l GNU/Linux
[email protected]:~# 
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Re: Raspberry Pi vs. Beagle Bone Black

Sat May 04, 2013 9:24 pm

Interesting...

I note a rather low bogomips rating.

I've got a Pi that shows 464.48 and a Cubieboard that shows 1006.38.

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Re: Raspberry Pi vs. Beagle Bone Black

Sat May 04, 2013 10:11 pm

I know some of the beagle series run at lower clocks when powered over USB to remain within USB power specs. I wonder if that applies to the black too.

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Re: Raspberry Pi vs. Beagle Bone Black

Sun May 05, 2013 3:20 am

plugwash wrote:I know some of the beagle series run at lower clocks when powered over USB to remain within USB power specs. I wonder if that applies to the black too.
On the spec sheet that I've seen, which is for the early "Oops!" processor, it said the board would run at 800MHz when fully powered, but at 600MHz when powered by a USB port.

So, yes, it appears that the BBB is doing that.

It's still a rather suprisingly low MIPs rate given the claims made for it. One would expect it to be closer to the Pi than it is, and higher than the Pi (even on USB) would not be a surprise. In addition, the Cubieboard is the same version of ARM (v71), so the low MIPs rate *ought* to scale with clock. Since the Cubie is running at 1GHz, that suggests that the BBB is running a lot closer to 250MHz, which would be shockingly low for a current board design.

The Cubie at least does show a good MIPs rate and it may help the comparison that both my Pi and the Cubie are running Raspbian, so the comparison is using the same operating system making it more of an "apples to apples" comparison than it might otherwise be.

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Re: Raspberry Pi vs. Beagle Bone Black

Sun May 05, 2013 6:26 am

This output from Gentoo shows a BeagleBone Black with bogomips of 990
http://www.gentoo.org/proj/en/base/embe ... =4&chap=12

However, other real-world tests might provide better comparisons.

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Re: Raspberry Pi vs. Beagle Bone Black

Sun May 05, 2013 7:35 am

pluggy wrote: The Pi should have been this painless to get going.
I'm sure when the Raspi gets to it's 5th iteration and has been on sale for 5 years and the Foundation is as big a company as TI, it will be...
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Re: Raspberry Pi vs. Beagle Bone Black

Sun May 05, 2013 8:41 am

jamesh wrote:
pluggy wrote: The Pi should have been this painless to get going.
I'm sure when the Raspi gets to it's 5th iteration and has been on sale for 5 years and the Foundation is as big a company as TI, it will be...
...not to mention the disparity between the two organizations development wages bill!
Whilst "pain" is not one of the foundation's goals, education is. So it's worth noteing that because of the "pain" a great deal was learnt by many.

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Re: Raspberry Pi vs. Beagle Bone Black

Sun May 05, 2013 10:12 am

Jessie wrote:How do you hate kimchee? Kimchee soup is my favorite Korean food. Eel is good eats as well. Soak it in.
Bleugh...although the eel was OK.

Although I should now say.

"England, I am in you"
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Re: Raspberry Pi vs. Beagle Bone Black

Sun May 05, 2013 10:23 am

My Pi was so painless to get going I don't even remember the ordeal. And I have two of them running now.
Memory in C++ is a leaky abstraction .

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Re: Raspberry Pi vs. Beagle Bone Black

Sun May 05, 2013 2:45 pm

As widely suspected, the BBB ups the processor when it has 'proper' 5V power on it.

This is it with 5V supplied to the DC jack connector :

Code: Select all

[email protected]:~# cat /proc/cpuinfo 
processor	: 0
model name	: ARMv7 Processor rev 2 (v7l)
BogoMIPS	: 990.68
Features	: swp half thumb fastmult vfp edsp thumbee neon vfpv3 tls 
CPU implementer	: 0x41
CPU architecture: 7
CPU variant	: 0x3
CPU part	: 0xc08
CPU revision	: 2

Hardware	: Generic AM33XX (Flattened Device Tree)
Revision	: 0000
Serial		: 0000000000000000
[email protected]:~# 
My Pi was so painless to get going I don't even remember the ordeal. And I have two of them running now.
I have 5 Pi's running 24/7, I can get them going in my sleep now, but judging by the trouble many on here have had its far from straight forward. And you do need quite a bit of stuff besides your PC and what comes in the Pi box.

There are flies in the ointment with the BBB, their T&C won't let you use the BBB in a finished product. They provide all the schematics and the chips are readily available in reasonable quantities, so when you've developed your product you get your own made. And the standard distro doesn't recognise my Wifi adaptor when I plug it in.....
Don't judge Linux by the Pi.......
I must not tread on too many sacred cows......

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Re: Raspberry Pi vs. Beagle Bone Black

Sun May 05, 2013 9:59 pm

pluggy wrote:As widely suspected, the BBB ups the processor when it has 'proper' 5V power on it.

This is it with 5V supplied to the DC jack connector :

Code: Select all

[email protected]:~# cat /proc/cpuinfo 
model name	: ARMv7 Processor rev 2 (v7l)
BogoMIPS	: 990.68
[email protected]:~# 
That's a lot more reasonable. I would take that figure as being near as makes no difference to the Cubieboard's 1006 figure.

Is there any word on what the clock frequency is set to when it's running from a USB port? Since the spec sheet was 600/800MHz for the early, slower SoC, I would have expected the MIPs rate for the USB connected BBB to be more like 700 to 800, rather than 300.

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Re: Raspberry Pi vs. Beagle Bone Black

Mon May 06, 2013 1:04 am

pluggy wrote:The Pi should have been this painless to get going.
Once the October 2012 Raspbian distro was released for the Pi, it was pretty much plug-'n-play as it allowed expansion of the main partition to use all of an SD card's space, autoconfigured WiFi for the Usual Suspect USB dongles, provided an easy way to set the locale for time zone and keyboard mapping, allowed sshd to be turned off, provided an option to run startx after boot-up, etc. Unless you're using a weird display or didn't provide an adequate power supply for more than a simple USB keyboard and mouse (which I warned about here back on May 2, 2012), it couldn't have been much less painless.

As for painful projects, I like to quote Danish philosopher Piet Hein, who said, "Problems worthy of attack prove their worth by fighting back." Kinda sums up science, technology, engineering, mathematics, education, life, etc., in a one-liner, doesn't it? ;)
The best things in life aren't things ... but, a Pi comes pretty darned close! :D
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Re: Raspberry Pi vs. Beagle Bone Black

Mon May 06, 2013 11:20 am

hi pluggy,

Could you try the commonly used perf test for your new BBB:

Code: Select all

time echo "scale=2000;4*a(1)" | bc -l
It takes 17 secs in my overclocked Pi. Would be nice to get an idea if the BBB is indeed faster.

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Re: Raspberry Pi vs. Beagle Bone Black

Mon May 06, 2013 3:14 pm

shuckle wrote:hi pluggy,

Could you try the commonly used perf test for your new BBB:

Code: Select all

time echo "scale=2000;4*a(1)" | bc -l
It takes 17 secs in my overclocked Pi. Would be nice to get an idea if the BBB is indeed faster.
13.159 secs on a Cubieboard.

jamesh
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Re: Raspberry Pi vs. Beagle Bone Black

Mon May 06, 2013 7:10 pm

shuckle wrote:hi pluggy,

Could you try the commonly used perf test for your new BBB:

Code: Select all

time echo "scale=2000;4*a(1)" | bc -l
It takes 17 secs in my overclocked Pi. Would be nice to get an idea if the BBB is indeed faster.
Overclocked to what frequency?
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Re: Raspberry Pi vs. Beagle Bone Black

Mon May 06, 2013 8:01 pm

1000Mhz overclock

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