From: Richard Hansen <rhansen@bbn.com>
Date: Wed, 21 May 2014 22:17:57 GMT
Subject: Re: [RFC/PATCH v4 1/3] add high resolution timer function to debug performance issues
Message-ID: <537D2615.20606@bbn.com>
In-Reply-To: <537D2528.3090806@bbn.com>

On 2014-05-21 18:14, Richard Hansen wrote:
> On 2014-05-20 15:11, Karsten Blees wrote:
>> Add a getnanotime() function that returns nanoseconds since 01/01/1970 as
>> unsigned 64-bit integer (i.e. overflows in july 2554).
> 
> Must it be relative to epoch?  If it was relative to system boot (like
> the NetBSD kernel's nanouptime() function),

or relative to some other arbitrary reference point

> then you wouldn't have to
> worry about clock adjustments messing with performance stats and you
> might have more options for implementing getnanotime() on various platforms.
> 
> -Richard