[collectd] ping plugin show ms

Florian Forster octo at verplant.org
Wed Aug 1 17:47:50 CEST 2007

Hi Rasto,

On Wed, Aug 01, 2007 at 05:12:41PM +0200, rastislav piater wrote:
> When I use ping plugin it show for example 234m in graph, but it is
> 0.234ms.

are you serious? To get (reliable) mearuements in the micro-second range
you likely need a realtime operating system or at least an unusual high
`HZ' setting, if you're under Linux..

> Is it bug ?

I don't think so: On a typical shared operating system many factors
influence the measurement of latency. This includes other IO on the
system, the number of interrupts, scheduler details and so on. Measuring
latencies that are close to 1ms is not very accurate. If you go as low
as 230us, the values are more of a load indicator than a network

Florian octo Forster
Hacker in training
GnuPG: 0x91523C3D
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