Re: [U-Boot-Users] decrease boot time
In message 20050212223026.42454C1430@atlas.denx.de I wrote:
You can do this even without hardware support. Attached below is a trivial expect script which you can use to pipe the output of your
Here comes the missing attachment...
terminal program into to get it timestamped. this is not perfect (as it timestamps on the _eond_ of each line), but does it's job in 95% of all cases. See the comment in the script for ow to use it.
I mean: ..._end_ of each line
Best regards,
Wolfgang Denk
Am 2005-02-12 23:52 +0100 schrieb Wolfgang Denk:
Here comes the missing attachment...
Eheee :) I foret taht also _every_ time :p
I mean: ..._end_ of each line
All right!
Konsti
Am 2005-02-12 23:52 +0100 schrieb Wolfgang Denk:
Here comes the missing attachment...
This works well enough, thank you very much. Output is at http://ludenkalle.de/boottime.txt
There are some delays I have in mind to optimize if possible:
0.082 Err: serial 0.213 Hit any key to stop autoboot: 0
0.233 Entry Point: 08008000 0.442 OK
0.445 Starting kernel ... 0.445 0.939 Linux v[...]
This is compressed kernelimage, lets see how an uncompressed behaves...
Regards, Konsti
Am 2005-02-14 13:26 +0100 schrieb Konstantin Kletschke:
This works well enough, thank you very much. Output is at http://ludenkalle.de/boottime.txt
This is booting uncompressed kernel:
http://ludenkalle.de/boottime_uc.txt
0.082 Err: serial 0.213 Hit any key to stop autoboot: 0
What is happening here?
0.233 Entry Point: 08008000 0.442 OK
And here? Is the "OK" the last thing u-boot says? When "Starting kernel ......." comes, is the image copyed already and the dots visualize decompressing?
0.445 0.939 Linux v[...]
This looks better now:
0.233 Entry Point: 08008000 0.674 OK 0.674 0.676 Starting kernel ... 0.676 0.690 Linux version 2.6.10-rc2
Regards, Konstantin Kletschke
In message 20050214134140.GA24678@synertronixx3 you wrote:
0.082 Err: serial 0.213 Hit any key to stop autoboot: 0
What is happening here?
0.233 Entry Point: 08008000 0.442 OK
Loading the image to RAM. Checksum verification?
And here? Is the "OK" the last thing u-boot says?
No. The "OK" gets printed after successful checksum verification.
When "Starting kernel ......." comes, is the image copyed already and the dots visualize decompressing?
Yes. And this is the last message you'll see from U-Boot.
BTW: You can easily find this out yourself by reading the source code - "lib_arm/armlinux.c" is just a few lines of code.
Best regards,
Wolfgang Denk
participants (2)
-
Konstantin Kletschke -
Wolfgang Denk