systemd-analyze
Startup finished in 3.245s (kernel) + 5.644s (userspace) = 8.890s
systemd-analyze blame
2.364s netctl@eth0.service 599ms systemd-udev-trigger.service 529ms systemd-remount-fs.service 484ms systemd-vconsole-setup.service 474ms kmod-static-nodes.service 450ms systemd-sysctl.service 416ms dev-mqueue.mount 264ms systemd-user-sessions.service 263ms haveged.service 196ms systemd-logind.service 119ms user@1000.service 104ms systemd-journal-flush.service 94ms systemd-update-utmp.service 79ms systemd-tmpfiles-setup.service 64ms systemd-tmpfiles-setup-dev.service 59ms systemd-random-seed.service 22ms boot.mount 21ms systemd-udevd.service 19ms tmp.mount 18ms ntpd.service 6ms systemd-tmpfiles-clean.service 3ms proc-sys-fs-binfmt_misc.mount
Show possible values cat /sys/class/leds/led1/trigger
none mmc0 mmc1 timer oneshot [heartbeat] backlight gpio cpu0 cpu1 cpu2 cpu3 default-on transient
How to shut up the alive led.
echo none > /sys/class/leds/led1/trigger
How to make it stop blinking:
echo default-on > /sys/class/leds/led1/trigger
How to make it show the eMMC activity:
echo mmc1 > /sys/class/leds/led1/trigger
How to make it show the SD activity:
echo mmc0 > /sys/class/leds/led1/trigger
How to make it blink as you want to:
echo timer > /sys/class/leds/led1/trigger
echo 1000 > /sys/class/leds/led1/delay_on echo 1000 > /sys/class/leds/led1/delay_off
For example to disable the heartbeat led.
/etc/tmpfiles.d/leds.conf
w /sys/class/leds/led1/trigger - - - - none
awk '{printf "%3.1f°C\n", $1/1000}' /sys/class/thermal/thermal_zone0/temp
udevadm info -a -n /dev/mmcblk0
Udevadm info starts with the device specified by the devpath and then walks up the chain of parent devices. It prints for every device found, all possible attributes in the udev rules key format. A rule to match, can be composed by the attributes of the device and the attributes from one single parent device. looking at device '/devices/platform/dw_mmc/mmc_host/mmc1/mmc1:0001/block/mmcblk0': KERNEL=="mmcblk0" SUBSYSTEM=="block" DRIVER=="" ATTR{ro}=="0" ATTR{size}=="30777344" ATTR{stat}==" 12560 2064 802099 15645 6501 8310 153608 252470 0 16495 268065" ATTR{range}=="8" ATTR{discard_alignment}=="0" ATTR{force_ro}=="0" ATTR{ext_range}=="8" ATTR{alignment_offset}=="0" ATTR{inflight}==" 0 0" ATTR{removable}=="0" ATTR{capability}=="10" looking at parent device '/devices/platform/dw_mmc/mmc_host/mmc1/mmc1:0001': KERNELS=="mmc1:0001" SUBSYSTEMS=="mmc" DRIVERS=="mmcblk" ATTRS{cid}=="1101003031364739320110594e9ba00f" ATTRS{csd}=="d00e00320f5903ffffffffef92400045" ATTRS{date}=="10/1997" ATTRS{name}=="016G92" ATTRS{type}=="MMC" ATTRS{rel_sectors}=="0x10" ATTRS{preferred_erase_size}=="4194304" ATTRS{fwrev}=="0x0" ATTRS{hwrev}=="0x0" ATTRS{oemid}=="0x0100" ATTRS{enhanced_area_offset}=="18446744073709551594" ATTRS{raw_rpmb_size_mult}=="0x4" ATTRS{manfid}=="0x000011" ATTRS{serial}=="0x10594e9b" ATTRS{erase_size}=="4194304" ATTRS{enhanced_area_size}=="4294967274" looking at parent device '/devices/platform/dw_mmc/mmc_host/mmc1': KERNELS=="mmc1" SUBSYSTEMS=="mmc_host" DRIVERS=="" looking at parent device '/devices/platform/dw_mmc': KERNELS=="dw_mmc" SUBSYSTEMS=="platform" DRIVERS=="dw_mmc" looking at parent device '/devices/platform': KERNELS=="platform" SUBSYSTEMS=="" DRIVERS==""
fdisk -l /dev/mmcblk0
Disk /dev/mmcblk0: 14.7 GiB, 15758000128 bytes, 30777344 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/mmcblk0p1 * 4096 135167 65536 83 Linux /dev/mmcblk0p2 135168 30777343 15321088 83 Linux
hdparm -t --direct /dev/mmcblk0
/dev/mmcblk0: Timing O_DIRECT disk reads: 186 MB in 3.01 seconds = 61.84 MB/sec
[root@odroidu3 ~]# ioping /dev/mmcblk0 4.0 KiB from /dev/mmcblk0 (device 14.7 GiB): request=1 time=444 us 4.0 KiB from /dev/mmcblk0 (device 14.7 GiB): request=2 time=396 us 4.0 KiB from /dev/mmcblk0 (device 14.7 GiB): request=3 time=391 us 4.0 KiB from /dev/mmcblk0 (device 14.7 GiB): request=4 time=681 us 4.0 KiB from /dev/mmcblk0 (device 14.7 GiB): request=5 time=380 us 4.0 KiB from /dev/mmcblk0 (device 14.7 GiB): request=6 time=385 us 4.0 KiB from /dev/mmcblk0 (device 14.7 GiB): request=7 time=706 us 4.0 KiB from /dev/mmcblk0 (device 14.7 GiB): request=8 time=677 us 4.0 KiB from /dev/mmcblk0 (device 14.7 GiB): request=9 time=378 us ^C --- /dev/mmcblk0 (device 14.7 GiB) ioping statistics --- 9 requests completed in 8.5 s, 2.0 k iops, 7.9 MiB/s min/avg/max/mdev = 378 us / 493 us / 706 us / 139 us