From a69e101ed1169f562fc030a783cd997d3f066b16 Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Thu, 14 Feb 2019 19:06:47 +0100 Subject: [PATCH] ipq40xx: speed up ath10k-caldata extraction Reading and writing to and from flash storage is slow and currently, the ath10kcal_extract() scripts are even more at an disadvantage because they use a block size of 1 to be able skip. This patch reworks the extraction scripts to be much faster and efficient by reading and writing the calibration data in possibly one big block. before: (Tested on a RT-AC58U, which has SPI-NAND). # time dd if=/dev/ubi0_1 of=/lib/firmware/... bs=1 skip=4096 count=12064 12064+0 records in 12064+0 records out real 0m 0.28s user 0m 0.02s sys 0m 0.24s after: # time dd if=/dev/ubi0_1 of=/lib/firmware/... bs=12064 skip=4096 count=1 iflag=skip_bytes 1+0 records in 1+0 records out real 0m 0.01s user 0m 0.00s sys 0m 0.00s Signed-off-by: Christian Lamparter --- .../base-files/etc/hotplug.d/firmware/11-ath10k-caldata | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/target/linux/ipq40xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata b/target/linux/ipq40xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata index 59a809e792..21d9063fd4 100644 --- a/target/linux/ipq40xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata +++ b/target/linux/ipq40xx/base-files/etc/hotplug.d/firmware/11-ath10k-caldata @@ -31,7 +31,7 @@ ath10kcal_extract() { [ -n "$mtd" ] || \ ath10kcal_die "no mtd device found for partition $part" - dd if=$mtd of=/lib/firmware/$FIRMWARE bs=1 skip=$offset count=$count 2>/dev/null || \ + dd if=$mtd of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \ ath10kcal_die "failed to extract calibration data from $mtd" } @@ -49,7 +49,7 @@ ath10kcal_ubi_extract() { [ -n "$ubi" ] || \ ath10kcal_die "no UBI volume found for $part" - dd if=/dev/$ubi of=/lib/firmware/$FIRMWARE bs=1 skip=$offset count=$count 2>/dev/null || \ + dd if=/dev/$ubi of=/lib/firmware/$FIRMWARE iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \ ath10kcal_die "failed to extract from $ubi" } -- 2.25.1