[Gta04-owner] Faster flashing of the hw-validation rootfs

Dr. H. Nikolaus Schaller hns at goldelico.com
Sat Feb 2 22:31:35 CET 2013


Am 02.02.2013 um 17:59 schrieb EdorFaus:

> Hi,
> I finally got around to upgrading my GTA04, and started by upgrading the hw-validation image to the latest stable (20121212).
> In so doing, I noticed that flashing its rootfs to NAND actually does a compress-decompress cycle on the data (with gzip) while copying it to flash (using tar).

Oh that comes from copy&paste of code that originally did the same thing through ssh (where zipping is useful).

> The attached patch removes this (as far as I can see) unnecessary compression, which almost halves the time needed to flash the rootfs, as timed by running "time ./flash-nand":
> I got these times for the patched script:
> real	7m58.643s
> user	0m9.039s
> sys	6m22.508s
> and these for the original:
> real	15m32.704s
> user	7m23.914s
> sys	6m45.523s
> which means that the original script takes about 1.95 times as long (in real time) as the patched version.

I will update it asap.

> Regards,
> Frode Austvik
> PS: I timed the patched version first, so any cache effects should benefit the original more than the patched version.
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