Messages in this thread | | | Date | Thu, 28 Aug 2008 12:36:45 -0700 (PDT) | Subject | Re: loaded router, excessive getnstimeofday in oprofile | From | David Miller <> |
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From: Denys Fedoryshchenko <denys@visp.net.lb> Date: Thu, 28 Aug 2008 19:48:52 +0300
> So there is few good solutions available (IMHO): > 1)Introduce some SO_REALTIMESTAMP (anyway even SO_TIMESTAMP not defined in any > standard) for banks and ntp folks, who need them. And even give them timespec > instead timeval, so they will be even more happy with resolution. > 2)Provide sysctl,kernel boot, or even "build time" option for "banks" to have > high resolution(and expensive) SO_TIMESTAMP.
The performance hit hurts, but changing the default to lower resolution after it having been high resolution for 10+ years is a regression and something we really can't do.
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