Since number_ios is checked in io_u.c account_io_completion() rather than a submission function, fio actually runs the requested number of I/Os plus iodepth - 1.
Example: for a job specifying:
number_ios=5000
iodepth=128
the results are:
read : io=20000KB, bw=222222KB/s, iops=56966, runt= 90msec
IO depths : 1=0.1%, 2=0.1%, 4=0.1%, 8=0.2%, 16=0.3%, 32=0.6%, >=64=98.8%
issued : total=r=5127/w=0/d=0, short=r=0/w=0/d=0
Should that just be documented as such, or should this logic be moved to submission?
static void account_io_completion(struct thread_data *td, struct io_u *io_u,
...
if (td->o.number_ios && !--td->o.number_ios)
td->done = 1;
---
Rob Elliott HP Server Storage
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