From: Olivier MATZ <olivier.matz@6wind.com>
To: Alexander Belyakov <abelyako@gmail.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] Surprisingly high TCP ACK packets drop counter
Date: Tue, 05 Nov 2013 11:10:26 +0100 [thread overview]
Message-ID: <5278C412.4000204@6wind.com> (raw)
In-Reply-To: <CAAQJX_SAUYaNbXrsLaTTaBfR_Mtr5A4ZDwskDNMXEd3SsKx6fA@mail.gmail.com>
Hi,
> Disabling RSC (DPDK 1.3) indeed brings ACK flood forwarding
> performance to 14,5+ Mpps. No negative side affects were discovered
> so far, but we're still testing.
The role of RSC is to reassemble input TCP segments, so it is possible
that the number of TCP packets sent to the DPDK is lower but some
packets may contain more data. Can you confirm that?
In my opinion, this mechanism should be disabled by default because it
could break PMTU discovery on a router. However it could be useful for
somebody doing TCP termination only.
Regards,
Olivier
next prev parent reply other threads:[~2013-11-05 10:09 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-01 13:43 Alexander Belyakov
2013-11-01 14:54 ` Wang, Shawn
2013-11-01 15:14 ` Thomas Monjalon
2013-11-02 5:32 ` Prashant Upadhyaya
2013-11-03 20:20 ` Alexander Belyakov
2013-11-04 3:06 ` Prashant Upadhyaya
2013-11-05 9:29 ` Alexander Belyakov
2013-11-05 10:10 ` Olivier MATZ [this message]
2013-11-05 11:59 ` Alexander Belyakov
2013-11-05 14:40 ` Prashant Upadhyaya
2013-11-05 17:03 ` Wang, Shawn
2013-11-06 8:42 ` Alexander Belyakov
2013-11-02 5:29 ` Prashant Upadhyaya
2013-11-03 20:32 ` Alexander Belyakov
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