Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | kvm_stat(1) =========== NAME ---- kvm_stat - Report KVM kernel module event counters SYNOPSIS -------- [verse] 'kvm_stat' [OPTION]... DESCRIPTION ----------- kvm_stat prints counts of KVM kernel module trace events. These events signify state transitions such as guest mode entry and exit. This tool is useful for observing guest behavior from the host perspective. Often conclusions about performance or buggy behavior can be drawn from the output. While running in regular mode, use any of the keys listed in section 'Interactive Commands' below. Use batch and logging modes for scripting purposes. The set of KVM kernel module trace events may be specific to the kernel version or architecture. It is best to check the KVM kernel module source code for the meaning of events. INTERACTIVE COMMANDS -------------------- [horizontal] *b*:: toggle events by guests (debugfs only, honors filters) *c*:: clear filter *f*:: filter by regular expression :: *Note*: Child events pull in their parents, and parents' stats summarize all child events, not just the filtered ones *g*:: filter by guest name/PID *h*:: display interactive commands reference *o*:: toggle sorting order (Total vs CurAvg/s) *p*:: filter by guest name/PID *q*:: quit *r*:: reset stats *s*:: set delay between refreshs *x*:: toggle reporting of stats for child trace events :: *Note*: The stats for the parents summarize the respective child trace events Press any other key to refresh statistics immediately. OPTIONS ------- -1:: --once:: --batch:: run in batch mode for one second -c:: --csv:: log in csv format. Requires option -l/--log or -L/--log-to-file. When used with option -L/--log-to-file, the header is only ever written to start of file to preserve the format. -d:: --debugfs:: retrieve statistics from debugfs -f<fields>:: --fields=<fields>:: fields to display (regex), "-f help" for a list of available events -g<guest>:: --guest=<guest_name>:: limit statistics to one virtual machine (guest name) -h:: --help:: show help message -i:: --debugfs-include-past:: include all available data on past events for debugfs -l:: --log:: run in logging mode (like vmstat) -L<file>:: --log-to-file=<file>:: like -l/--log, but logging to a file. Appends to existing files. -p<pid>:: --pid=<pid>:: limit statistics to one virtual machine (pid) -s:: --set-delay:: set delay between refreshs (value range: 0.1-25.5 secs) -t:: --tracepoints:: retrieve statistics from tracepoints -z:: --skip-zero-records:: omit records with all zeros in logging mode SEE ALSO -------- 'perf'(1), 'trace-cmd'(1) AUTHOR ------ Stefan Hajnoczi <stefanha@redhat.com> |