X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=HOWTO;h=3bda021d17c9090929d4276161b346242a0f27c4;hp=0c243076ef65be503d7fc17d63ba4f7737182ec9;hb=dc372f07b450e3b4c758d7a7fdaaca6c21843398;hpb=d2e268b09bc8ab95af81e5636608dcd93f40e4c1 diff --git a/HOWTO b/HOWTO index 0c243076..3bda021d 100644 --- a/HOWTO +++ b/HOWTO @@ -343,6 +343,9 @@ ioengine=str Defines how the job issues io to the file. The following or receive, if the latter only the port argument is used. + netsplice Like net, but uses splice/vmsplice to + map data and send/receive. + cpu Doesn't transfer any data, but burns CPU cycles according to the cpuload= and cpucycle= options. Setting cpuload=85 @@ -694,9 +697,10 @@ E Thread exited, not reaped by main thread yet. _ Thread reaped. The other values are fairly self explanatory - number of threads -currently running and doing io, rate of io since last check, and the estimated -completion percentage and time for the running group. It's impossible to -estimate runtime of the following groups (if any). +currently running and doing io, rate of io since last check (read speed +listed first, then write speed), and the estimated completion percentage +and time for the running group. It's impossible to estimate runtime of +the following groups (if any). When fio is done (or interrupted by ctrl-c), it will show the data for each thread, group of threads, and disks in that order. For each data @@ -723,7 +727,10 @@ runt= The runtime of that thread slat= Submission latency (avg being the average, stdev being the standard deviation). This is the time it took to submit the io. For sync io, the slat is really the completion - latency, since queue/complete is one operation there. + latency, since queue/complete is one operation there. This + value can be in miliseconds or microseconds, fio will choose + the most appropriate base and print that. In the example + above, miliseconds is the best scale. clat= Completion latency. Same names as slat, this denotes the time from submission to completion of the io pieces. For sync io, clat will usually be equal (or very close) to 0,