NAME

       lttng-iolatencytop - LTTng analyses IO latency top

DESCRIPTION

       usage: lttng-iolatencytop [-h] [-r REFRESH] [--gmt] [--skip-validation]

       [--begin BEGIN] [--end END] [--period PERIOD]
              [--period-captures  PERIOD_CAPTURES]  [--period-begin  PERIOD_BEGIN]  [--period-end
              PERIOD_END] [--period-begin-key PERIOD_BEGIN_KEY] [--period-end-key PERIOD_END_KEY]
              [--period-key-value   PERIOD_KEY_VALUE]   [--cpu   CPU]   [--timerange   TIMERANGE]
              [--progress-use-size]    [--no-intersection]    [-V]     [--debug]     [--no-color]
              [--no-progress]  [--min  MIN] [--max MAX] [--log] [--limit LIMIT] [--top] [--stats]
              [--freq]  [--freq-resolution  FREQ_RESOLUTION]   [--freq-uniform]   [--freq-series]
              [--usage] [--minsize MINSIZE] [--maxsize MAXSIZE] <path/to/trace>

       The I/O command.

   positional arguments:
       <path/to/trace>
              trace path

   optional arguments:
       -h, --help
              show this help message and exit

       -r REFRESH, --refresh REFRESH
              Refresh period, with optional units suffix (default units: s)

       --gmt  Manipulate timestamps based on GMT instead of local time

       --skip-validation
              Skip the trace validation

       --begin BEGIN
              start time: hh:mm:ss[.nnnnnnnnn]

       --end END
              end time: hh:mm:ss[.nnnnnnnnn]

       --period PERIOD
              Period definition

       --period-captures PERIOD_CAPTURES
              Period captures definition

       --period-begin PERIOD_BEGIN
              Analysis period start marker event name

       --period-end PERIOD_END
              Analysis period end marker event name (requires --period-begin)

       --period-begin-key PERIOD_BEGIN_KEY
              Optional, list of event field names used to match period markers (default: cpu_id)

       --period-end-key PERIOD_END_KEY
              Optional, list of event field names used to match period marker. If none specified,
              use the same --period-begin-key

       --period-key-value PERIOD_KEY_VALUE
              Optional, define a fixed key  value  to  which  a  period  must  correspond  to  be
              considered.

       --cpu CPU
              Filter the results only for this list of CPU IDs

       --timerange TIMERANGE
              time range: [begin,end]

       --progress-use-size
              use trace size to approximate progress

       --no-intersection
              disable stream intersection mode

       -V, --version
              show program's version number and exit

       --debug
              Enable debug mode (or set LTTNG_ANALYSES_DEBUG environment variable)

       --no-color
              Disable colored output

       --no-progress
              Don't display the progress bar

       --min MIN
              Filter out durations shorter than min usec

       --max MAX
              Filter out durations longer than max usec

       --log  Output the I/O requests in chronological order

       --limit LIMIT
              Limit to top X (default = 10)

       --top  Output the top I/O latencies by category

       --stats
              Output the I/O latency statistics

       --freq Output the I/O latency frequency distribution

       --freq-resolution FREQ_RESOLUTION
              Frequency distribution resolution (default 20)

       --freq-uniform
              Use a uniform resolution across distributions

       --freq-series
              Consolidate frequency distribution histogram as a single one

       --usage
              Output the I/O usage

       --minsize MINSIZE
              Filter out, I/O operations working with less that minsize bytes

       --maxsize MAXSIZE
              Filter out, I/O operations working with more that maxsize bytes