looking for performance statistics (native JAVA processors)

N

noone

hey.

Does anyone have references to performance stats or whitepapers about
performance of native java processors vs. software jvm for embedded apps?
I read the hardware specs on a couple of 100mhz processors and they didn't
seem very impressive, even for running bytecode in hardware. One spec
showed a benchmark of copying a 10,000 byte array in 64ms. On the surface
that seems fast but consider that 10000/0.064secs=1.25mbits/sec. and they
include an ethernet tranceiver on the eval board. I haven't used a 1mb/s
ethernet in nearly 15 years!

I guess what I'm really wondering is whether there are java native
processors out there that can approach risc mips levels. I
understand that there will be emulation overhead even in hardware but my
requirements will be to keep up with 802.11b wireless speeds: 11bm/s.
Anyone know of java native processors that can deliver that kind of
thru-put and support the FULL J2ME specs?


tanks
 
T

Thomas Hawtin

noone said:
Does anyone have references to performance stats or whitepapers about
performance of native java processors vs. software jvm for embedded apps?
I read the hardware specs on a couple of 100mhz processors and they didn't
seem very impressive, even for running bytecode in hardware. One spec
showed a benchmark of copying a 10,000 byte array in 64ms. On the surface
that seems fast but consider that 10000/0.064secs=1.25mbits/sec. and they
include an ethernet tranceiver on the eval board. I haven't used a 1mb/s
ethernet in nearly 15 years!

640 cycles per iteration. Running interpreted on my desktop machine
gives around 200 cycles per iteration. However, CLDC (and even RTSJ)
have block copying methods which will presumably be written natively.
I guess what I'm really wondering is whether there are java native
processors out there that can approach risc mips levels. I
understand that there will be emulation overhead even in hardware but my
requirements will be to keep up with 802.11b wireless speeds: 11bm/s.
Anyone know of java native processors that can deliver that kind of
thru-put and support the FULL J2ME specs?

ARM processors with Jazelle can execute Java byte code directly at a
reasonable pace. They also support Ahead-Of-Time (AOT) compilation for
speed critical parts.

http://www.arm.com/products/esd/jazelle_home.html
http://www.arm.com/linux/

Tom Hawtin
 

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question

Members online

No members online now.

Forum statistics

Threads
473,744
Messages
2,569,484
Members
44,903
Latest member
orderPeak8CBDGummies

Latest Threads

Top