want fio to use placement identifier only at indices 0, 2 and 5 specify
``fdp_pli=0,2,5``.
-.. option:: md_per_io_size=int : [io_uring_cmd]
+.. option:: md_per_io_size=int : [io_uring_cmd] [xnvme]
Size in bytes for separate metadata buffer per IO. Default: 0.
User datagram protocol V6.
**unix**
UNIX domain socket.
+ **vsock**
+ VSOCK protocol.
- When the protocol is TCP or UDP, the port must also be given, as well as the
- hostname if the job is a TCP listener or UDP reader. For unix sockets, the
+ When the protocol is TCP, UDP or VSOCK, the port must also be given, as well as the
+ hostname if the job is a TCP or VSOCK listener or UDP reader. For unix sockets, the
normal :option:`filename` option should be used and the port is invalid.
+ When the protocol is VSOCK, the :option:`hostname` is the CID of the remote VM.
.. option:: listen : [netsplice] [net]
same reporting group, unless if separated by a :option:`stonewall`, or by
using :option:`new_group`.
- NOTE: When :option: `group_reporting` is used along with `json` output,
- there are certain per-job properties which can be different between jobs
- but do not have a natural group-level equivalent. Examples include
- `kb_base`, `unit_base`, `sig_figs`, `thread_number`, `pid`, and
- `job_start`. For these properties, the values for the first job are
- recorded for the group.
+ NOTE: When :option:`group_reporting` is used along with `json` output,
+ there are certain per-job properties which can be different between jobs
+ but do not have a natural group-level equivalent. Examples include
+ `kb_base`, `unit_base`, `sig_figs`, `thread_number`, `pid`, and
+ `job_start`. For these properties, the values for the first job are
+ recorded for the group.
.. option:: new_group
.. option:: log_avg_msec=int
- By default, fio will log an entry in the iops, latency, or bw log for every
- I/O that completes. When writing to the disk log, that can quickly grow to a
- very large size. Setting this option makes fio average the each log entry
- over the specified period of time, reducing the resolution of the log. See
- :option:`log_max_value` as well. Defaults to 0, logging all entries.
- Also see `Log File Formats`_.
+ By default, fio will log an entry in the iops, latency, or bw log for
+ every I/O that completes. When writing to the disk log, that can
+ quickly grow to a very large size. Setting this option directs fio to
+ instead record an average over the specified duration for each log
+ entry, reducing the resolution of the log. When the job completes, fio
+ will flush any accumulated latency log data, so the final log interval
+ may not match the value specified by this option and there may even be
+ duplicate timestamps. See :option:`log_window_value` as well. Defaults
+ to 0, logging entries for each I/O. Also see `Log File Formats`_.
.. option:: log_hist_msec=int
histogram logs contain 1216 latency bins. See :option:`write_hist_log`
and `Log File Formats`_.
-.. option:: log_max_value=bool
+.. option:: log_window_value=str, log_max_value=str
- If :option:`log_avg_msec` is set, fio logs the average over that window. If
- you instead want to log the maximum value, set this option to 1. Defaults to
- 0, meaning that averaged values are logged.
+ If :option:`log_avg_msec` is set, fio by default logs the average over that
+ window. This option determines whether fio logs the average, maximum or
+ both the values over the window. This only affects the latency logging,
+ as both average and maximum values for iops or bw log will be same.
+ Accepted values are:
+
+ **avg**
+ Log average value over the window. The default.
+
+ **max**
+ Log maximum value in the window.
+
+ **both**
+ Log both average and maximum value over the window.
+
+ **0**
+ Backward-compatible alias for **avg**.
+
+ **1**
+ Backward-compatible alias for **max**.
.. option:: log_offset=bool
by the ioengine specific :option:`cmdprio_percentage`.
Fio defaults to logging every individual I/O but when windowed logging is set
-through :option:`log_avg_msec`, either the average (by default) or the maximum
-(:option:`log_max_value` is set) *value* seen over the specified period of time
-is recorded. Each *data direction* seen within the window period will aggregate
-its values in a separate row. Further, when using windowed logging the *block
-size* and *offset* entries will always contain 0.
+through :option:`log_avg_msec`, either the average (by default), the maximum
+(:option:`log_window_value` is set to max) *value* seen over the specified period
+of time, or both the average *value* and maximum *value1* (:option:`log_window_value`
+is set to both) is recorded. The log file format when both the values are reported
+takes this form:
+
+ *time* (`msec`), *value*, *value1*, *data direction*, *block size* (`bytes`),
+ *offset* (`bytes`), *command priority*
+
+
+Each *data direction* seen within the window period will aggregate its values in a
+separate row. Further, when using windowed logging the *block size* and *offset*
+entries will always contain 0.
Client/Server
projects / fio.git / blobdiff