From: Eric Dumazet <eric.dumazet@gmail.com>
To: Jerry Chu <hkchu@google.com>
Cc: Stephen Hemminger <shemminger@vyatta.com>, netdev@vger.kernel.org
Subject: Re: [PATCH] Add useful per-connection TCP stats for diagnosis purpose.
Date: Sat, 19 Mar 2011 06:02:40 +0100 [thread overview]
Message-ID: <1300510960.2831.2.camel@edumazet-laptop> (raw)
In-Reply-To: <AANLkTikrJ7A-ygc9JnkvfBpRaKjL0fKeta+9ASLDr0rg@mail.gmail.com>
Le vendredi 18 mars 2011 à 21:33 -0700, Jerry Chu a écrit :
> I'm well aware of the past, hideous O(n**2) problem of reading
> /proc/net/tcp but I
> thought the problem has been fixed by Tom Herbert a while back, no?
> (See http://marc.info/?l=linux-netdev&m=127588123429437&w=2)
>
O(N) is still too slow, to gather stats for your socket, if you want to
gather stats once per second for example.
AFAIK, I am not sure we want to allow any user to access all these data
for all tcp sockets on the machine. This might have security impacts.
next prev parent reply other threads:[~2011-03-19 5:02 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-17 8:06 [PATCH] Add useful per-connection TCP stats for diagnosis purpose H.K. Jerry Chu
2011-03-17 8:42 ` Eric Dumazet
2011-03-17 20:16 ` Jerry Chu
2011-03-17 21:20 ` Stephen Hemminger
2011-03-18 4:33 ` Jerry Chu
2011-03-18 4:51 ` David Miller
2011-03-18 6:05 ` Eric Dumazet
2011-03-19 4:33 ` Jerry Chu
2011-03-19 5:02 ` Eric Dumazet [this message]
2011-03-19 5:38 ` Jerry Chu
2011-03-19 6:03 ` Eric Dumazet
2011-03-20 7:30 ` Jerry Chu
2011-03-20 9:18 ` Eric Dumazet
2011-03-21 21:18 ` Stephen Hemminger
2011-03-21 22:19 ` Ben Greear
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