From: Nathaniel Smith <njs@pobox.com>
To: "John W. Linville" <linville@tuxdriver.com>
Cc: bloat-devel@lists.bufferbloat.net, johannes@sipsolutions.net,
linux-wireless@vger.kernel.org
Subject: Re: [RFC v2] mac80211: implement eBDP algorithm to fight bufferbloat
Date: Fri, 25 Feb 2011 10:27:24 -0800 [thread overview]
Message-ID: <AANLkTinOPNNi8e3NHpFw0ABtF5GBU_NfuMmOxnKKdo1f@mail.gmail.com> (raw)
In-Reply-To: <AANLkTimahYNo0ZHr9PU217CWJQP6ssuhaxguYVz7dX_-@mail.gmail.com>
On Fri, Feb 25, 2011 at 10:21 AM, Nathaniel Smith <njs@pobox.com> wrote:
> static u64 _ktime_diff_to_now_and_unstash(ktime_t then, int * enqueued) {
>
> timespec ts_then = ktime_to_timespec(then);
> timespec ts_now = ktime_to_timespec(ktime_get());
> *enqueued = ts_then.tv_sec >> LATENCY_BITS;
> ts_then.tv_sec &= (1 << LATENCY_BITS) - 1;
> ts_now.tv_sec &= (1 << LATENCY_BITS) - 1;
> if (ts_now.tv_sec < ts_then.tv_sec)
> ts_now.tv_sec += (1 << LATENCY_BITS);
> timespec_sub(ts_now, ts_then);
> }
Err, plus the 'return timespec_to_ns(...)' on the last line, that I
was trying to add when my computer suddenly decided I wanted to send
the message. How embarrassing.
Anyway, not sure this is a *good* idea, but it should work. Hopefully
we don't actually need to measure latencies > 256 seconds in this
context...
-- Nathaniel
next prev parent reply other threads:[~2011-02-25 18:27 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1297619803-2832-1-git-send-email-njs@pobox.com>
2011-02-17 1:49 ` [RFC] " John W. Linville
2011-02-17 3:31 ` Ben Greear
2011-02-17 4:26 ` Nathaniel Smith
2011-02-17 8:31 ` Johannes Berg
2011-02-18 21:21 ` [RFC v2] " John W. Linville
2011-02-19 3:44 ` Nathaniel Smith
2011-02-21 18:47 ` John W. Linville
2011-02-21 23:26 ` Nathaniel Smith
2011-02-23 22:28 ` John W. Linville
2011-02-25 18:21 ` Nathaniel Smith
2011-02-25 18:27 ` Nathaniel Smith [this message]
2011-02-20 0:37 ` Nathaniel Smith
2011-02-20 0:51 ` Jim Gettys
2011-02-20 15:24 ` Dave Täht
2011-02-21 18:52 ` John W. Linville
2011-02-21 15:28 ` Johannes Berg
2011-02-21 16:12 ` Jim Gettys
2011-02-21 19:15 ` John W. Linville
2011-02-21 19:06 ` John W. Linville
2011-02-21 19:29 ` [RFC v2] mac80211: implement eBDP algorithm to fight bufferbloat - AQM on hosts Jim Gettys
2011-02-21 20:26 ` [RFC v2] mac80211: implement eBDP algorithm to fight bufferbloat Tianji Li
2011-02-28 13:07 ` Johannes Berg
[not found] <x1-oTZGm1A7eclvABnv1aK0z1Nc7iI@gwene.org>
2011-02-20 1:59 ` Dave Täht
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