Date: Fri, 20 Mar 2015 11:02:02 -0700 From: Adrian Chadd <adrian@freebsd.org> To: Hans Petter Selasky <hps@selasky.org> Cc: Emeric POUPON <emeric.poupon@stormshield.eu>, freebsd-net <freebsd-net@freebsd.org> Subject: Re: Fragment questions Message-ID: <CAJ-Vmo=LkFc4sqbBSVeLE=7adV1nCuRDUO4ECUv8r6EYp=Oezw@mail.gmail.com> In-Reply-To: <550C5FC6.6020401@selasky.org> References: <522774578.25519037.1426765109046.JavaMail.zimbra@stormshield.eu> <550AC709.1050404@selasky.org> <2047974073.25663527.1426858267777.JavaMail.zimbra@stormshield.eu> <550C5FC6.6020401@selasky.org>
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On 20 March 2015 at 10:58, Hans Petter Selasky <hps@selasky.org> wrote: > On 03/20/15 14:31, Emeric POUPON wrote: >> >> - in the ip_newid macro, we do "htons(V_ip_id++))" if we do not use >> randomized id. > >> In multi core systems, we may emit successive packets with the same id. > > Will using a mutex or an atomic macro fix this issue when incrementing the > V_ip_id ? It will, but it'll ping-pong between multiple cores and slow things down at high pps. -a
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