X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=HOWTO;h=a534aa865d8c4a9384ebee3d823ecaaaf0fdfb3d;hb=f7690c4ac0c9e7609ffdf8ed6255a64e1fa44606;hp=81217b77906a6956d1e6bd8ebd70c2986dbb6348;hpb=09c782bbe1c62d016c8b165f304c7085a7ff9ffd;p=fio.git

diff --git a/HOWTO b/HOWTO
index 81217b77..a534aa86 100644
--- a/HOWTO
+++ b/HOWTO
@@ -1049,7 +1049,7 @@ rate=int	Cap the bandwidth used by this job. The number is in bytes/sec,
 		will only limit writes (to 500KB/sec), the latter will only
 		limit reads.
 
-ratemin=int	Tell fio to do whatever it can to maintain at least this
+rate_min=int	Tell fio to do whatever it can to maintain at least this
 		bandwidth. Failing to meet this requirement, will cause
 		the job to exit. The same format as rate is used for
 		read vs write separation.
@@ -1064,6 +1064,15 @@ rate_iops_min=int If fio doesn't meet this rate of IO, it will cause
 		the job to exit. The same format as rate is used for read vs
 		write separation.
 
+rate_process=str	This option controls how fio manages rated IO
+		submissions. The default is 'linear', which submits IO in a
+		linear fashion with fixed delays between IOs that gets
+		adjusted based on IO completion rates. If this is set to
+		'poisson', fio will submit IO based on a more real world
+		random request flow, known as the Poisson process
+		(https://en.wikipedia.org/wiki/Poisson_process). The lambda
+		will be 10^6 / IOPS for the given workload.
+
 latency_target=int	If set, fio will attempt to find the max performance
 		point that the given workload will run at while maintaining a
 		latency below this target. The values is given in microseconds.
@@ -1081,7 +1090,7 @@ latency_percentile=float	The percentage of IOs that must fall within the
 max_latency=int	If set, fio will exit the job if it exceeds this maximum
 		latency. It will exit with an ETIME error.
 
-ratecycle=int	Average bandwidth for 'rate' and 'ratemin' over this number
+rate_cycle=int	Average bandwidth for 'rate' and 'rate_min' over this number
 		of milliseconds.
 
 cpumask=int	Set the CPU affinity of this job. The parameter given is a