[ECOS] about GDB download speed.

[ECOS] about GDB download speed.

[user new]

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hello, everybody,
 
    I have ported redboot to an ARM
board with a FLASH ROM in 0x00000000, and the redboot
is running in ROM mode. Debug function is OK, and the
tftp download speed is about 3 M bps. But the GDB
download speed is only about 75 K bps. 
    I have read the mail talking about
speed up the GDB download speed, and modified the
packet size of redboot GDB stub to 20K bytes, 
 
(generic-stub.c)
// #define BUFMAX 2048
#define BUFMAX 20480
 
and set the GDB with the following command in the
console:
 
    set download-write-size 20000
    set remote memory-write-packet-size
20000
    set remote memory-write-packet-size
fixed
 
    Why the speed is still so slow,
does the mode of run in ROM effect? BTW, I have never
enabled the cache of the CPU, does this effect?
    Any suggestion is appreciated.
 
Best Reguards
Rich
 



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[ECOS] about GDB download speed.

[user new]

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hello, everybody,

    (sorry about my last mail.)
    I have ported redboot to an ARM board with a FLASH
ROM in 0x00000000, and the redboot is running in ROM
mode. Debug function is OK, and the tftp download
speed is about 3 M bps. But the GDB download speed is
only about 75 K bps. 
    I have read the mail talking about speed up the
GDB download speed, and modified the packet size of
redboot GDB stub to 20K bytes, 

(generic-stub.c)
// #define BUFMAX 2048
#define BUFMAX 20480

and set the GDB with the following command in the
console:

    set download-write-size 20000
    set remote memory-write-packet-size 20000
    set remote memory-write-packet-size fixed

    Why the speed is still so slow, does the mode of
run in ROM effect? BTW, I have never enabled the cache
of the CPU, does this effect?
    Any suggestion is appreciated.

Best Reguards
Rich


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