Date: Fri, 28 Feb 2020 10:39:26 -0800 From: "Bruce A. Mah" <bmah@kitchenlab.org> To: Daniel Ebdrup Jensen <debdrup@freebsd.org>, freebsd-drivers@freebsd.org, FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: Network throughput not reaching line rate. Need clarification on iflib. Message-ID: <f64e8fb8-0a72-ffc0-2301-a081399483b6@freebsd.org> In-Reply-To: <CAJEDNsi%2B-zC=LEv5y67X7pcKP83hLP=uSqcZRwdye_gWKRLjvQ@mail.gmail.com> References: <CAAO%2BANPvfRhLiCZX=0UWDToKWNACrZ66JgOd%2Bs_p9fAgc%2BrWTw@mail.gmail.com> <7cfc7c52-b548-19bd-343b-899aca45c654@selasky.org> <CAJEDNsi%2B-zC=LEv5y67X7pcKP83hLP=uSqcZRwdye_gWKRLjvQ@mail.gmail.com>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --qrNmNCjXwFmmeToMAo61h8GL3XdXiU5U5 Content-Type: multipart/mixed; boundary="pKTErZ1aK2VLvBLO35ATmgxOt2uY6UAa4" --pKTErZ1aK2VLvBLO35ATmgxOt2uY6UAa4 Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable [Resending with a From: address that hopefully works better.] If memory serves me right, Daniel Ebdrup Jensen wrote: > Yes, iperf3 will default to single-threaded packet generation, et al. w= hich > favours fast cores with frequency boosting facilities. > You might want to use iperf2 as that's properly multi-threaded, or you = can > use pkt-gen out of src/tools/tools/netmap/ or ports/net/pkt-gen. While it's true that iperf3 is single-threaded, it should be capable of saturating a 10GE link with a single TCP connection, given proper command-line arguments (in particular, specifying a sufficiently large socket-buffer size with the -w option). But based on the symptom of packet loss, I'd say the single-threaded vs. multi-threaded argument might not be relevant to the problem that the OP has. Bruce. > On Fri, Feb 28, 2020 at 10:35 AM Hans Petter Selasky <hps@selasky.org> > wrote: >=20 >> On 2020-02-28 10:03, Rajesh Kumar wrote: >>> Hi FreeBSD team, >>> >>> I am writing a network driver using iflib framework and using "iperf3= " >> tool >>> for performance testing. >>> >> >> Is there any difference with "iperf" tool and using multiple threads? = I >> think iperf3 is single threaded ??? >> >> --HPS >> >> _______________________________________________ >> freebsd-hackers@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-hackers >> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.= org" >> > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.o= rg" >=20 --pKTErZ1aK2VLvBLO35ATmgxOt2uY6UAa4-- --qrNmNCjXwFmmeToMAo61h8GL3XdXiU5U5 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ iQEzBAEBCgAdFiEE+Fo4IENp9xo01E6DSYSRCoyq7ooFAl5ZXl4ACgkQSYSRCoyq 7oqhsggAq+89fH/jmgMNHr8Um2yKdWKrojVtsuvbTBZJfeQA61JXJ1g+Rf3SO5Fy uIqoH0nN0UL4UB2pc5JPV/CxuO8RagZwzDXD6fcJxjdM7FD3CE/EkbEdFe+T+wKH PTkSC9dLFzPNQypV8Lzfd9lWOhJYIoOgoCDTYxrYa1Mv4NnxU5P8BvAeo2peKD4G mae8dGfQICnjTEI0rIYCy0pn1zugICpTZ/6Xe3mMN4+jKCGI4Rm1wiULfeGYC+TZ rwfMGlmnSse8ZukCvd3/T3r7IQ5BTEfcd/nhDp7mcJ4YySxHyqKw9pu4V7n01vy9 +TOq6qBOY+r9l7HPaU08priiayQOZA== =Wg/V -----END PGP SIGNATURE----- --qrNmNCjXwFmmeToMAo61h8GL3XdXiU5U5--
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