I recently got a TS-7800, in the hope that because of the EABI support
and the 500 MHz processor, it would perform much better at floating
point math than the 7260 I was testing before.
I was unsuccessful in getting the crosstools to work from Ubuntu.
When I ftp'd my executable to the 7800, and did a "chmod +x test", I
keep getting-"-bash: ./test: No such file or directory" If anyone has
any thoughts on this problem, I'd appreciate it.
But I'm really eager to determine if the 7800 can solve my performance
problem, so I ftp'd my source code over, and compiled it natively on
the 7800. No compiler options (do I need any?)
Strangely, benchmarking 1000 iterations of my algorithm, I got almost
exactly the same performance as with the 7260- about 54ms per
iteration. I expected that even if EABI wasn't doing it's job, I
would at least get a 2.5 times speed up from the clock rate. My test
code reads a line (maybe 100 bytes) from a data file in the NAND flash
once per iteration; otherwise, I can't think of anything outside the
processor that takes any time.
Has anyone else benchmarked floating point on the 7800, and gotten
better results? Any idea what I might be doing wrong? Thanks,
-Mike
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