From: Eric Dumazet <eric.dumazet@gmail.com>
To: "Srećko Jurić-Kavelj" <srecko.juric-kavelj@fer.hr>
Cc: Dave Taht <dave.taht@gmail.com>,
Chris Friesen <chris.friesen@genband.com>,
netdev@vger.kernel.org
Subject: Re: Using jiffies for tcp_time_stamp?
Date: Fri, 25 May 2012 21:00:32 +0200 [thread overview]
Message-ID: <1337972432.3347.70.camel@edumazet-glaptop> (raw)
In-Reply-To: <CAACrLC0eVZJdu802Ff4BWRBKuabS=Z-T3WvZCxyqBTem8-n8ug@mail.gmail.com>
On Fri, 2012-05-25 at 20:35 +0200, Srećko Jurić-Kavelj wrote:
> From what I've seen in the code, NO_HZ doesn't make jiffies go away,
> it simply doesn't use regular CONFIG_HZ interrupt to update, but
> updates them when has an opportunity?
HZ=1000 makes jiffies 10 times more precise, and with NO_HZ, generates
no extra timer interrupts.
This also makes timers workload smoothed, instead of spikes.
prev parent reply other threads:[~2012-05-25 19:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAACrLC39Xdm3vTKUsjz43ZPyEq_vHxR-_Uf56SjSm+kUqxOqZg@mail.gmail.com>
2012-05-22 17:21 ` Using jiffies for tcp_time_stamp? Srećko Jurić-Kavelj
2012-05-25 15:58 ` Chris Friesen
2012-05-25 16:17 ` Dave Taht
2012-05-25 16:23 ` Srećko Jurić-Kavelj
2012-05-25 16:54 ` Eric Dumazet
2012-05-25 18:35 ` Srećko Jurić-Kavelj
2012-05-25 19:00 ` Eric Dumazet [this message]
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