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Message-ID: <AANLkTimeXEaUnzSBuilbQLHj_oho3ia9EgyPGpB7vJRI@mail.gmail.com> Date: Fri, 14 May 2010 15:28:31 -0700 From: john stultz <johnstul@...ibm.com> To: Jesper Dangaard Brouer <hawk@...u.dk> Cc: Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org, netdev <netdev@...r.kernel.org>, Len Brown <len.brown@...el.com>, Shaohua Li <shaohua.li@...el.com>, hawk@...x.dk Subject: Re: TSC unstable due to TSC halts in idle? On Fri, May 14, 2010 at 1:13 PM, Jesper Dangaard Brouer <hawk@...u.dk> wrote: > I want to know, if its safe to enable the TSC clocksource, when the > kernel reports: > "Marking TSC unstable due to TSC halts in idle" > > The system selects HPET (in current_clocksource), but I can still see > TSC as an available clocksource (in > /sys/devices/system/clocksource/clocksource0/available_clocksource). > > Is it safe to enable TSC manually (by changing current_clocksource)? > (my workload is 10Git/s routing, cannot survive with a slow clock) > > > Any trick to avoid this? (e.g. kernel config setting, or a /sys/ setting > which changes the minimum P-state?) Might try booting with the max-cstate=1 option. thanks -john -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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