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| author | Adrian Schmutzler <freifunk@adrianschmutzler.de> | 2019-03-07 09:40:08 +0100 |
|---|---|---|
| committer | Christian Lamparter <chunkeey@gmail.com> | 2019-03-13 16:27:41 +0100 |
| commit | 51fb186cb3d238bcc73ca14a5240ec091e30d413 (patch) | |
| tree | c7e9a0aabf66a64637ce5981d5564accf154808c /target/linux/brcm2708/patches-4.14/950-0342-BCM270X_DT-Add-CSI-defines-for-all-the-downstream-Pi.patch | |
| parent | e1ba59ea5c0270c1cce696d5c93bec460cdc7ca3 (diff) | |
| download | upstream-51fb186cb3d238bcc73ca14a5240ec091e30d413.tar.gz upstream-51fb186cb3d238bcc73ca14a5240ec091e30d413.tar.bz2 upstream-51fb186cb3d238bcc73ca14a5240ec091e30d413.zip | |
ar71xx: Speed up caldata/eeprom handling
Reading and writing to and from flash storage is slowed down
enormously by some functions which use a block size of 1.
This patch reworks the extraction scripts to be much faster and
efficient by reading and writing in possibly one big block.
This is based on the initial commit a69e101 for ipq40xx by
Christian Lamparter <chunkeey@gmail.com>.
Speed comparison @ TP-Link TL-WDR4300 (just manually) results
in a time reduction by three orders of magnitude (99.9 %).
> time dd if=/dev/mtd3 of=/lib/firmware/test-slow bs=1 count=4096 skip=4096
4096+0 records in
4096+0 records out
real 0m 15.85s
user 0m 0.06s
sys 0m 13.28s
> time dd if=/dev/mtd3 of=/lib/firmware/test-fast bs=4096 count=1 skip=4096 iflag=skip_bytes
1+0 records in
1+0 records out
real 0m 0.02s
user 0m 0.00s
sys 0m 0.02s
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0342-BCM270X_DT-Add-CSI-defines-for-all-the-downstream-Pi.patch')
0 files changed, 0 insertions, 0 deletions