Merge remote-tracking branch 'gitlab/wiki' into HEAD

1 files changed, 38 insertions, 0 deletions

diff --git a/wiki/EMMC-speed-raw-data/mmc.sh b/wiki/EMMC-speed-raw-data/mmc.sh
new file mode 100644
index 0000000..0faaa82
--- /dev/null
+++ b/wiki/EMMC-speed-raw-data/mmc.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+
+do_one ()
+{
+   	echo "# $@"
+   	"$@"
+}
+
+do_test ()
+{
+	for i in $(seq 3); do
+   		do_one "$@"
+		sleep 10
+	done
+}
+
+echo "# dmesg | grep mmc0"
+dmesg | grep mmc0
+do_one cat /sys/kernel/debug/mmc0/ios
+do_one cat /sys/devices/platform/soc/*/mmc_host/mmc0/mmc0:0001/cid
+
+echo
+echo "Read from MMC, direct"
+do_test dd if=/dev/mmcblk0 of=/dev/null bs=1M count=512 iflag=direct
+
+echo
+echo "Read from MMC, no direct"
+do_test dd if=/dev/mmcblk0 of=/dev/null bs=1M count=512
+
+echo
+echo "Write to MMC, direct"
+do_test dd if=/dev/zero of=/dev/mmcblk0 bs=1M count=512 oflag=direct
+
+echo
+echo "Write to MMC, no direct"
+do_test dd if=/dev/zero of=/dev/mmcblk0 bs=1M count=512
+
+echo