perf/Documentation/perf-daemon.txt

1 perf-daemon(1)
6 ----
7 perf-daemon - Run record sessions on background
11 --------
16 'perf daemon stop'   [<options>]
22 -----------
32 …916507  916508 ...  \_ perf record --control=fifo:control,ack -m 10M -e cycles --overwrite --switc…
33 …916507  916509 ...  \_ perf record --control=fifo:control,ack -m 20M -e sched:* --overwrite --swit…
38 to produce data periodically, like with --switch-output configuration
41 Each session is started with control setup (with perf record --control
49 -------
50 -v::
51 --verbose::
54 --config=<PATH>::
58 --base=<PATH>::
67 -------------
70 -f::
71 --foreground::
75 STOP COMMAND
76 ------------
77 The stop command stops all the session and the daemon process.
81 --------------
84 --session::
89 ------------
92 --session::
97 -----------
105 session-<NAME>.run:
113 --------
120   [session-cycles]
121   run = -m 10M -e cycles --overwrite --switch-output -a
123   [session-sched]
124   run = -m 20M -e sched:* --overwrite --switch-output -a
136   [603350:cycles] perf record -m 10M -e cycles --overwrite --switch-output -a
137   [603351:sched] perf record -m 20M -e sched:* --overwrite --switch-output -a
144   # perf daemon -v
149   [603350:cycles] perf record -m 10M -e cycles --overwrite --switch-output -a
150     base:    /opt/perfdata/session-cycles
151     output:  /opt/perfdata/session-cycles/output
152     control: /opt/perfdata/session-cycles/control
153     ack:     /opt/perfdata/session-cycles/ack
155   [603351:sched] perf record -m 20M -e sched:* --overwrite --switch-output -a
156     base:    /opt/perfdata/session-sched
157     output:  /opt/perfdata/session-sched/output
158     control: /opt/perfdata/session-sched/control
159     ack:     /opt/perfdata/session-sched/ack
166 The 'control' and 'ack' files are perf control files.
179   # perf daemon signal --session cycles
182   # tail -2  /opt/perfdata/session-cycles/output
193   # tail -2  /opt/perfdata/session-cycles/output
196   # tail -2  /opt/perfdata/session-sched/output
201 Stop daemon:
203   # perf daemon stop
207 --------
208 linkperf:perf-record[1], linkperf:perf-config[1]