From 5d02b083f521bf7508249af8d3c7987992c7b718 Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Mon, 9 Nov 2015 18:45:35 -0700 Subject: [PATCH] Clarify spread/lambda of poisson Signed-off-by: Jens Axboe --- HOWTO | 3 ++- fio.1 | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/HOWTO b/HOWTO index e259aa7f..a534aa86 100644 --- a/HOWTO +++ b/HOWTO @@ -1070,7 +1070,8 @@ rate_process=str This option controls how fio manages rated IO 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). + (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 diff --git a/fio.1 b/fio.1 index 6f72ec0f..3cc353a3 100644 --- a/fio.1 +++ b/fio.1 @@ -969,7 +969,8 @@ This option controls how fio manages rated IO submissions. The default is IOs that gets adjusted based on IO completion rates. If this is set to \fBpoisson\fR, 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). +(https://en.wikipedia.org/wiki/Poisson_process). The lambda will be +10^6 / IOPS for the given workload. .TP .BI rate_cycle \fR=\fPint Average bandwidth for \fBrate\fR and \fBrate_min\fR over this number of -- 2.25.1