On 06/14/2014 11:37 PM, Kai Krakow wrote: > Goffredo Baroncelli <kreij...@libero.it> schrieb: > >> On 06/14/2014 10:13 PM, Kai Krakow wrote: >>> Take care to enable all needed services to enable defrag... If your >>> services make use of journal file loading these files should also become >>> part of the process. You can check with >>> "/usr/lib/systemd/systemd-readahead analyze". The state is stored in >>> /.readahead. >>> >> I have enabled all the services (collect, replay, done), but I was unable >> to see any gain. > > I don't think you can actually enable the "done" service because it is > static... But if it placed a symlink in /etc/systemd that is probably wrong > and you should undo it. It is automatically activated a few seconds after > booting is done to store the collected data for replaying on next reboot.
I checked the output of systemd-analyze: systemd-readahead-done is called at the end of the chart. The sym-links exist only for the collect and replay services, which were called at the beginning. > > Check with "find /etc/systemd -name '*readahead*' -type l"... > >> I don't know why but system.journal is not considered by readahead: >> >> # /usr/lib/systemd/systemd-readahead analyze | grep journal >> >> >> 100% ( 1) 770: /etc/systemd/journald.conf >> 50% ( 1) 4194304: >> /var/log/journal/36f10f5379ec4a1398ac303a0ce20fd0/user-997.journal >> 50% ( 1) 4194304: >> /var/log/journal/36f10f5379ec4a1398ac303a0ce20fd0/user-1000.journal > > I tried that on my system and it looks vice-versa somehow: > > $ sudo /usr/lib/systemd/systemd-readahead analyze|fgrep journal > 100% ( 1) 812: /etc/systemd/journald.conf > 100% ( 1) 8388608: > /var/log/journal/121b87ca633e8ac0016656680000001b/system.journal > > Strange... ;-) May be this is a reason of my degraded performance. However I tried on two machines (all fedora) and after several reboot; I tried also removing the /.readahead file... Nothing. On another fedora machine, I found $ sudo /lib/systemd/systemd-readahead analyze | grep journal 100% ( 1) 220384: /usr/lib/systemd/systemd-journald 100% ( 1) 770: /etc/systemd/journald.conf 100% ( 1) 24544: /usr/lib64/rsyslog/imjournal.so 100% ( 1) 122880: /usr/lib64/libsystemd-journal.so.0.11.3 50% ( 1) 4194304: /var/log/journal/189323cd4cc348159b9fd5b32b566b05/user-1000@0004f1b1019bc549-09d9ae048ff8eeef.journal~ 100% ( 1) 8388608: /var/log/journal/189323cd4cc348159b9fd5b32b566b05/user-1000@0004f1b7dcfd728c-38950862a134194d.journal~ 50% ( 1) 4194304: /var/log/journal/189323cd4cc348159b9fd5b32b566b05/user-995@0004f1c3fa738010-b0829bd837e30f61.journal~ 50% ( 1) 4194304: /var/log/journal/189323cd4cc348159b9fd5b32b566b05/user-995.journal 100% ( 1) 8388608: /var/log/journal/189323cd4cc348159b9fd5b32b566b05/system@0004f6ed6604ebc7-bb2f3b30ac6eb32c.journal~ 100% ( 1) 8388608: /var/log/journal/189323cd4cc348159b9fd5b32b566b05/user-1000@0004f6ed66a05b08-9d244b02cc294baf.journal~ 77% ( 1) 6508544: /var/log/journal/189323cd4cc348159b9fd5b32b566b05/system@0004f6ed6d02e69f-d9c815aa06264d7a.journal~ 100% ( 1) 8388608: /var/log/journal/189323cd4cc348159b9fd5b32b566b05/user-1000@0004f6ed6db6dd7d-cc84da57d5b01680.journal~ 100% ( 1) 8388608: /var/log/journal/189323cd4cc348159b9fd5b32b566b05/user-1000.journal 100% ( 1) 121: /var/lib/rsyslog/imjournal.state So some journal files are present, but not the current one (system.journal) > To get back to your performance problem: Did you try "systemctl enable > bootchart" and then (after a reboot) look at the png generated in /run/log > (at least in my system it is placed there, look at the configs if in doubt). > It can give some interesting clues about why a service starts late or takes > long to execute. Unfortunately bootchart doesn't work on fedora, because CONFIG_SCHEDSTATS is not enabled in the kernel. -- gpg @keyserver.linux.it: Goffredo Baroncelli (kreijackATinwind.it> Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5 _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/systemd-devel