From: Andi Kleen <andi@firstfloor.org>
To: Juliusz Chroboczek <Juliusz.Chroboczek@pps.jussieu.fr>
Cc: Andi Kleen <andi@firstfloor.org>, netdev@vger.kernel.org
Subject: Re: [PATCH] Stochastic Fair Blue queue discipline
Date: Tue, 8 Apr 2008 19:53:53 +0200 [thread overview]
Message-ID: <20080408175353.GA17147@one.firstfloor.org> (raw)
In-Reply-To: <7iwsn8s107.fsf@lanthane.pps.jussieu.fr>
On Tue, Apr 08, 2008 at 07:35:36PM +0200, Juliusz Chroboczek wrote:
> > no net_random/srandom32 is per CPU and likely does the wrong thing for you.
>
> Why is that? I'm only using this to initialise a global data
> structure, why should it matter that I use per-cpu state?
Because they're independent and there is no guarantee you always
run on the same CPU and sampling them randomly will not necessarily
give you a good random number sequence.
-Andi
next prev parent reply other threads:[~2008-04-08 17:49 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-04-07 22:37 [PATCH] Stochastic Fair Blue queue discipline Juliusz Chroboczek
2008-04-08 0:04 ` Patrick McHardy
2008-04-08 0:56 ` Patrick McHardy
2008-04-08 15:28 ` Juliusz Chroboczek
2008-04-08 8:20 ` Andi Kleen
2008-04-08 12:11 ` Patrick McHardy
2008-04-08 15:39 ` Juliusz Chroboczek
2008-04-08 15:45 ` Patrick McHardy
2008-04-09 15:48 ` Juliusz Chroboczek
2008-04-09 16:00 ` Patrick McHardy
2008-04-08 15:38 ` Juliusz Chroboczek
2008-04-08 16:32 ` Andi Kleen
2008-04-08 17:35 ` Juliusz Chroboczek
2008-04-08 17:53 ` Andi Kleen [this message]
2008-04-09 15:45 ` Juliusz Chroboczek
2008-04-09 17:49 ` Andi Kleen
2008-04-10 1:23 ` Patrick McHardy
2008-04-10 1:38 ` Patrick McHardy
2008-04-10 11:17 ` Juliusz Chroboczek
2008-04-11 13:07 ` Patrick McHardy
2008-04-10 14:04 ` Stephen Hemminger
2008-04-10 7:36 ` Andi Kleen
2008-04-08 16:44 ` Patrick McHardy
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