X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=man%2Fsystemd-analyze.xml;h=073e807b416097b2adc4d005530dc14086d4187c;hp=ae7a3377c65be90c49e60f00bb07d7061f2d7af7;hb=de59d29e8abc32ff8e5de6a36ddf9d04d63ccb47;hpb=fa3868c6d317b88715c55422b898f9070afe6575 diff --git a/man/systemd-analyze.xml b/man/systemd-analyze.xml index ae7a3377c..073e807b4 100644 --- a/man/systemd-analyze.xml +++ b/man/systemd-analyze.xml @@ -21,7 +21,8 @@ along with systemd; If not, see . --> - + systemd-analyze @@ -81,6 +82,24 @@ OPTIONS dot PATTERN + > file.dot + + + systemd-analyze + OPTIONS + dump + + + systemd-analyze + OPTIONS + set-log-level + LEVEL + + + systemd-analyze + OPTIONS + verify + FILES @@ -88,14 +107,16 @@ Description systemd-analyze may be used - to determine system boot-up performance of the current - boot. + to determine system boot-up performance statistics and + retrieve other state and tracing information from the + system and service manager, and to verify the + correctness of unit files. systemd-analyze time prints the time spent in the kernel before userspace has been reached, the time spent in the initial RAM disk (initrd) before normal system - userspace has been reached and the time normal system + userspace has been reached, and the time normal system userspace took to initialize. Note that these measurements simply measure the time passed up to the point where all system services have been spawned, but @@ -111,7 +132,7 @@ of another service to complete. systemd-analyze critical-chain [UNIT...] - prints a tree of the time critical chain of units + prints a tree of the time-critical chain of units (for each of the specified UNITs or for the default target otherwise). The time after the unit is active or started is printed @@ -127,7 +148,7 @@ been started at what time, highlighting the time they spent on initialization. - systemd-analyze dot Generate + systemd-analyze dot generates textual dependency graph description in dot format for further processing with the GraphViz dot1 @@ -135,7 +156,7 @@ dot | dot -Tsvg > systemd.svg to generate a graphical dependency tree. Unless or - is passed the generated graph will show both ordering + is passed, the generated graph will show both ordering and requirement dependencies. Optional pattern globbing style specifications (e.g. *.target) may be given at @@ -143,7 +164,32 @@ any of these patterns match either the origin or destination node. - If no command is passed systemd-analyze + systemd-analyze dump outputs + a (usually very long) human-readable serialization of + the complete server state. Its format is subject to + change without notice and should not be parsed by + applications. + + systemd-analyze set-log-level + LEVEL changes the + current log level of the systemd + daemon to LEVEL (accepts + the same values as + described in + systemd1). + + systemd-analyze verify will + load unit files and print warnings if any errors are + detected. Files specified on the command line will be + loaded, but also any other units referenced by + them. This command works by prepending the directories + for all command line arguments at the beginning of the + unit load path, which means that all units files found + in those directories will be used in preference to the + unit files found in the standard locations, even if + not listed explicitly. + + If no command is passed, systemd-analyze time is implied. @@ -155,19 +201,18 @@ - - + - Prints a short help - text and exits. + Operates on the user + systemd instance. - + - Shows performance data - of user sessions instead of the system - manager. + Operates on the system + systemd instance. This is the implied + default. @@ -179,19 +224,19 @@ dot command (see above), selects which dependencies are shown in the dependency graph. If - is passed + is passed, only dependencies of type After= or Before= are shown. If - is passed only dependencies of type + is passed, only dependencies of type Requires=, RequiresOverridable=, Requisite=, RequisiteOverridable=, Wants= and Conflicts= are - shown. If neither is passed, shows + shown. If neither is passed, this shows dependencies of all these types. @@ -203,16 +248,16 @@ When used in conjunction with the dot command (see - above), selects which relationships + above), this selects which relationships are shown in the dependency graph. They both require glob7 patterns as arguments, which are - matched against lefthand and - righthand, respectively, nodes of a + matched against left-hand and + right-hand, respectively, nodes of a relationship. Each of these can be - used more than once which means a - unit name must match one of given + used more than once, which means a + unit name must match one of the given values. @@ -226,8 +271,23 @@ latest unit in the same level. The unit of timespan is seconds unless specified with a different unit, - i.e. "50ms". + e.g. "50ms". + + + + + + Do not invoke man to verify the existence + of man pages listen in Documentation=. + + + + + + + + @@ -235,27 +295,96 @@ Exit status - On success 0 is returned, a non-zero failure + On success, 0 is returned, a non-zero failure code otherwise. - Examples + Examples for <command>dot</command> - This plots all dependencies of any unit whose - name starts with "avahi-daemon.": + + Plots all dependencies of any unit whose + name starts with <literal>avahi-daemon</literal> - $ systemd-analyze dot 'avahi-daemon.*' | dot -Tsvg > avahi.svg -$ eog avahi.svg + $ systemd-analyze dot 'avahi-daemon.*' | dot -Tsvg > avahi.svg + $ eog avahi.svg + - This plots the dependencies between all known target units: + + Plots the dependencies between all known target units - systemd-analyze dot --to-pattern='*.target' --from-patter='*.target' | dot -Tsvg > targets.svg + systemd-analyze dot --to-pattern='*.target' --from-pattern='*.target' | dot -Tsvg > targets.svg $ eog targets.svg + + - + + Examples for <command>verify</command> + + The following errors are currently detected: + + unknown sections and + directives, + + missing dependencies which are + required to start the given unit, + + + man pages listed in + Documentation= which are + not found in the system, + + commands listed in + ExecStart= and similar + which are not found in the system or not + executable. + + + + Misspelt directives + + $ cat ./user.slice +[Unit] +WhatIsThis=11 +Documentation=man:nosuchfile(1) +Requires=different.service + +[Service] +Desription=x + +$ systemd-verify ./user.slice +[./user.slice:9] Unknown lvalue 'WhatIsThis' in section 'Unit' +[./user.slice:13] Unknown section 'Service'. Ignoring. +Error: org.freedesktop.systemd1.LoadFailed: + Unit different.service failed to load: + No such file or directory. +Failed to create user.slice/start: Invalid argument +user.slice: man nosuchfile(1) command failed with code 16 + + + + + Missing service units + + $ tail ./a.socket ./b.socket +==> ./a.socket <== +[Socket] +ListenStream=100 + +==> ./b.socket <== +[Socket] +ListenStream=100 +Accept=yes + +$ systemd-verify ./a.socket ./b.socket +Service a.service not loaded, a.socket cannot be started. +Service b@0.service not loaded, b.socket cannot be started. + + + + See Also