1d450bc50SJiri Olsaperf-daemon(1) 2d450bc50SJiri Olsa============== 3d450bc50SJiri Olsa 4d450bc50SJiri Olsa 5d450bc50SJiri OlsaNAME 6d450bc50SJiri Olsa---- 7d450bc50SJiri Olsaperf-daemon - Run record sessions on background 8d450bc50SJiri Olsa 9d450bc50SJiri Olsa 10d450bc50SJiri OlsaSYNOPSIS 11d450bc50SJiri Olsa-------- 12d450bc50SJiri Olsa[verse] 13d450bc50SJiri Olsa'perf daemon' 14d450bc50SJiri Olsa'perf daemon' [<options>] 15d450bc50SJiri Olsa'perf daemon start' [<options>] 16d450bc50SJiri Olsa 17d450bc50SJiri Olsa 18d450bc50SJiri OlsaDESCRIPTION 19d450bc50SJiri Olsa----------- 20d450bc50SJiri OlsaThis command allows to run simple daemon process that starts and 21d450bc50SJiri Olsamonitors configured record sessions. 22d450bc50SJiri Olsa 23c0666261SJiri OlsaYou can imagine 'perf daemon' of background process with several 24c0666261SJiri Olsa'perf record' child tasks, like: 25c0666261SJiri Olsa 26c0666261SJiri Olsa # ps axjf 27c0666261SJiri Olsa ... 28c0666261SJiri Olsa 1 916507 ... perf daemon start 29c0666261SJiri Olsa 916507 916508 ... \_ perf record --control=fifo:control,ack -m 10M -e cycles --overwrite --switch-output -a 30c0666261SJiri Olsa 916507 916509 ... \_ perf record --control=fifo:control,ack -m 20M -e sched:* --overwrite --switch-output -a 31c0666261SJiri Olsa 32c0666261SJiri OlsaNot every 'perf record' session is suitable for running under daemon. 33c0666261SJiri OlsaUser need perf session that either produces data on query, like the 34c0666261SJiri Olsaflight recorder sessions in above example or session that is configured 35c0666261SJiri Olsato produce data periodically, like with --switch-output configuration 36c0666261SJiri Olsafor time and size. 37d450bc50SJiri Olsa 38d450bc50SJiri OlsaOPTIONS 39d450bc50SJiri Olsa------- 40d450bc50SJiri Olsa-v:: 41d450bc50SJiri Olsa--verbose:: 42d450bc50SJiri Olsa Be more verbose. 43d450bc50SJiri Olsa 44fc1dcb1eSJiri Olsa--config=<PATH>:: 45fc1dcb1eSJiri Olsa Config file path. If not provided, perf will check system and default 46fc1dcb1eSJiri Olsa locations (/etc/perfconfig, $HOME/.perfconfig). 47fc1dcb1eSJiri Olsa 485631d100SJiri Olsa--base=<PATH>:: 495631d100SJiri Olsa Base directory path. Each daemon instance is running on top 505631d100SJiri Olsa of base directory. 515631d100SJiri Olsa 52d450bc50SJiri OlsaAll generic options are available also under commands. 53d450bc50SJiri Olsa 54d450bc50SJiri Olsa 55d450bc50SJiri OlsaSTART COMMAND 56d450bc50SJiri Olsa------------- 57d450bc50SJiri OlsaThe start command creates the daemon process. 58d450bc50SJiri Olsa 5988adb119SJiri Olsa-f:: 6088adb119SJiri Olsa--foreground:: 6188adb119SJiri Olsa Do not put the process in background. 6288adb119SJiri Olsa 63d450bc50SJiri Olsa 64c0666261SJiri OlsaCONFIG FILE 65c0666261SJiri Olsa----------- 66c0666261SJiri OlsaThe daemon is configured within standard perf config file by 67c0666261SJiri Olsafollowing new variables: 68c0666261SJiri Olsa 69c0666261SJiri Olsadaemon.base: 70c0666261SJiri Olsa Base path for daemon data. All sessions data are 71c0666261SJiri Olsa stored under this path. 72c0666261SJiri Olsa 73c0666261SJiri Olsasession-<NAME>.run: 74c0666261SJiri Olsa Defines new record session. The value is record's command 75c0666261SJiri Olsa line without the 'record' keyword. 76c0666261SJiri Olsa 77c0666261SJiri OlsaEach perf record session is run in daemon.base/<NAME> directory. 78c0666261SJiri Olsa 79c0666261SJiri Olsa 80d450bc50SJiri OlsaSEE ALSO 81d450bc50SJiri Olsa-------- 82d450bc50SJiri Olsalinkperf:perf-record[1], linkperf:perf-config[1] 83