From: Eric Dumazet <eric.dumazet@gmail.com>
To: Jesper Dangaard Brouer <jbrouer@redhat.com>
Cc: "Toke Høiland-Jørgensen" <toke@toke.dk>,
"Mike Frysinger" <vapier@gentoo.org>,
"Jiri Pirko" <jpirko@redhat.com>,
netdev@vger.kernel.org, bloat@lists.bufferbloat.net,
"Jiri Benc" <jbenc@redhat.com>,
"Patrick McHardy" <kaber@trash.net>,
"Steven Barth" <cyrus@openwrt.org>,
"David Miller" <davem@redhat.com>,
"Jussi Kivilinna" <jussi.kivilinna@mbnet.fi>,
"Felix Fietkau" <nbd@nbd.name>, "Michal Soltys" <soltys@ziu.info>
Subject: Re: [Bloat] [PATCH] net_sched: htb: do not mix 1ns and 64ns time units
Date: Tue, 04 Jun 2013 13:50:31 -0700 [thread overview]
Message-ID: <1370379031.24311.226.camel@edumazet-glaptop> (raw)
In-Reply-To: <20130604222135.67eedab8@redhat.com>
On Tue, 2013-06-04 at 22:21 +0200, Jesper Dangaard Brouer wrote:
> But how is this 64-bit usage going to affect performance for smaller
> ARM/MIPS based home routers, where shaping at these low rates is more
> relevant? (I'm just asking because I don't know, and just test this
> on a 24-CPU machine).
Well, by definition shaping at low rates is mostly using the timer
infra, and its already 64bit. You'll hardly spend time in HTB.
Note that psched_time_t is already 64bit wide.
Only psched_tdiff_t is 'unsigned long', and the change I made in this
patch will not change performance even on 32bit hosts.
next prev parent reply other threads:[~2013-06-04 20:50 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-29 13:13 [Bloat] tc linklayer ADSL calc broken after commit 56b765b79 (htb: improved accuracy at high rates) Jesper Dangaard Brouer
2013-05-29 15:52 ` Eric Dumazet
2013-05-29 22:50 ` Stephen Hemminger
2013-05-29 23:18 ` Eric Dumazet
2013-05-30 9:15 ` Jesper Dangaard Brouer
2013-05-30 9:52 ` Steinar H. Gunderson
2013-05-30 0:34 ` Dave Taht
2013-05-30 8:09 ` Jesper Dangaard Brouer
2013-05-30 7:51 ` Jesper Dangaard Brouer
2013-05-30 14:39 ` Eric Dumazet
2013-05-30 15:55 ` Jesper Dangaard Brouer
2013-06-02 21:15 ` Eric Dumazet
2013-06-04 12:13 ` [Bloat] Bad shaping at low rates, " Jesper Dangaard Brouer
2013-06-04 15:18 ` Eric Dumazet
2013-06-04 15:55 ` Eric Dumazet
2013-06-04 16:02 ` Eric Dumazet
2013-06-04 17:11 ` [Bloat] [PATCH] net_sched: htb: do not mix 1ns and 64ns time units Eric Dumazet
2013-06-04 20:21 ` Jesper Dangaard Brouer
2013-06-04 20:26 ` Dave Taht
2013-06-04 21:02 ` Eric Dumazet
2013-06-04 20:50 ` Eric Dumazet [this message]
2013-06-05 0:44 ` David Miller
2013-06-06 13:55 ` [Bloat] RFC: Proposed fix for tc linklayer calc broken after commit 56b765b79 (htb: improved accuracy at high rates) Jesper Dangaard Brouer
2013-06-06 14:28 ` Eric Dumazet
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