Optimizing boot time

gustavs · 2021-02-12 07:52:44

Hello, I've been using Arch for about a year now, but only now I have gotten around to optimizing my boot time.
So far, disabling a Wait Online service shaved 4 seconds off the boot time. What else can I improve?

System info is:
KDE Plasma,
Ryzen 5 2600, Radeon RX 570
16GB of 3200mhz RAM
Boot drive is 120G SSD, pretty filled up but not completely.
Network is connected via RJ-45 cable. No other network adapters plugged in.

Output of systemd-analyze:

Startup finished in 10.088s (firmware) + 1.269s (loader) + 2.887s (kernel) + 2.316s (userspace) = 16.561s 
graphical.target reached after 2.315s in userspace

Output of systemd-analyze blame:

1.100s udisks2.service                                    
 897ms systemd-random-seed.service                        
 548ms lvm2-monitor.service                               
 488ms dhcpcd.service                                     
 360ms upower.service                                     
 328ms user@1000.service                                  
 326ms dev-sdc2.device                                    
 267ms home-gustavs-raspberrypi\x2dserver.mount           
 207ms systemd-journal-flush.service                      
 176ms systemd-udevd.service                              
 168ms systemd-fsck@dev-disk-by\x2dlabel-LinuxHome.service
 150ms efi.mount                                          
 127ms NetworkManager.service                             
 121ms systemd-logind.service                             
 120ms systemd-machined.service                           
  97ms polkit.service                                     
  72ms systemd-timesyncd.service                          
  65ms systemd-journald.service                           
  60ms systemd-udev-trigger.service                       
  50ms modprobe@drm.service                               
  45ms systemd-tmpfiles-setup.service                     
  44ms home.mount                                         
  43ms systemd-fsck@dev-sdc1.service                      
  41ms systemd-modules-load.service                       
  32ms modprobe@fuse.service                              
  31ms systemd-tmpfiles-setup-dev.service                 
  28ms systemd-binfmt.service                             
  23ms dev-hugepages.mount                                
  23ms dev-mqueue.mount                                   
  22ms sys-kernel-debug.mount                             
  22ms sys-kernel-tracing.mount                           
  21ms kmod-static-nodes.service                          
  21ms tmp.mount                                          
  20ms modprobe@configfs.service                          
  12ms user-runtime-dir@1000.service                      
  11ms proc-sys-fs-binfmt_misc.mount                      
  11ms sys-kernel-config.mount                            
   6ms systemd-update-utmp.service                        
   6ms systemd-remount-fs.service                         
   5ms systemd-sysctl.service                             
   3ms rtkit-daemon.service                               
   2ms systemd-user-sessions.service                      
   2ms sys-fs-fuse-connections.mount

If you need any additional info, I'll try my best to provide it.

seth · 2021-02-12 08:44:23

Look at the critical chain to see what's currently stalling your boot. Focus on that.

gustavs · 2021-02-12 09:01:41

This is the output:

graphical.target @2.315s
└─sddm.service @2.315s
  └─systemd-user-sessions.service @2.310s +2ms
    └─network.target @1.893s
      └─dhcpcd.service @1.403s +488ms
        └─basic.target @1.400s
          └─sockets.target @1.400s
            └─virtlogd.socket @1.400s
              └─sysinit.target @1.398s
                └─systemd-timesyncd.service @1.326s +72ms
                  └─systemd-tmpfiles-setup.service @1.276s +45ms
                    └─local-fs.target @1.275s
                      └─home.mount @1.229s +44ms
                        └─systemd-fsck@dev-disk-by\x2dlabel-LinuxHome.service @1.058s +168ms
                          └─local-fs-pre.target @1.056s
                            └─lvm2-monitor.service @507ms +548ms
                              └─lvm2-lvmetad.service @750ms
                                └─systemd-udevd.service @573ms +176ms
                                  └─systemd-tmpfiles-setup-dev.service @540ms +31ms
                                    └─kmod-static-nodes.service @506ms +21ms
                                      └─systemd-journald.socket @501ms
                                        └─-.mount @483ms
                                          └─-.slice @483ms

seth · 2021-02-12 09:04:44

If you don't need lvm, you could mask that.
https://bbs.archlinux.org/viewtopic.php?id=263539

But the system boots fast, the slow parts will be SDDM and whatever your session is (plasma, I assume)

fire100265 · 2021-02-12 13:16:51

You could try not having any compression on the initrd images. Not using LVM should also speed up boot times. Switching to multi-user.target and using startx should help as well.

Arch Linux

#1 2021-02-12 07:52:44

Optimizing boot time

#2 2021-02-12 08:44:23

Re: Optimizing boot time

#3 2021-02-12 09:01:41

Re: Optimizing boot time

#4 2021-02-12 09:04:44

Re: Optimizing boot time

#5 2021-02-12 13:16:51

Re: Optimizing boot time

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