In fio.1 and HOWTO, add link to Poisson process in wikipedia
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/HOWTO b/HOWTO
index 03a0060..f8b488f 100644
--- a/HOWTO
+++ b/HOWTO
@@ -1064,8 +1064,11 @@
the job to exit. The same format as rate is used for read vs
write separation.
-rate_poisson=bool When rate limited, try to simulate request flow under
- Poisson process (instead of even distribution). Default: false.
+rate_poisson=bool Real world random request flow follows Poisson process
+ (https://en.wikipedia.org/wiki/Poisson_process). With
+ rate_poisson=1, fio tries to simulate request flow under Poisson
+ process (instead of even distribution, which is the default).
+ Default: false.
latency_target=int If set, fio will attempt to find the max performance
point that the given workload will run at while maintaining a
diff --git a/fio.1 b/fio.1
index 99d9f9e..b8e31db 100644
--- a/fio.1
+++ b/fio.1
@@ -964,8 +964,10 @@
is used for read vs write separation.
.TP
.BI rate_poisson \fR=\fPbool
-When rate limited, try to simulate request flow under Poisson process (instead
-of even distribution). Default: false.
+Real world random request flow follows Poisson process
+(https://en.wikipedia.org/wiki/Poisson_process). With \fBrate_poisson\fR=1, fio
+tries to simulate request flow under Poisson process (instead of even
+distribution, which is the default). Default: false.
.TP
.BI ratecycle \fR=\fPint
Average bandwidth for \fBrate\fR and \fBratemin\fR over this number of
