Date: Tue, 31 Jul 2007 12:03:15 +0200 From: Gergely CZUCZY <phoemix@harmless.hu> To: Markus Oestreicher <m.oe@x-trader.de> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org> Subject: Re: more interrupts with polling(4) on em(4) Message-ID: <20070731100315.GA34300@harmless.hu> In-Reply-To: <46AA7710.2070803@x-trader.de> References: <20070727115520.GA10957@harmless.hu> <46AA7710.2070803@x-trader.de>
next in thread | previous in thread | raw e-mail | index | archive | help
--TB36FDmn/VVEgNH/ Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sat, Jul 28, 2007 at 12:52:00AM +0200, Markus Oestreicher wrote: > Gergely CZUCZY schrieb: > >Good morning, > >I've noticed 33K interrupts/sec on an em(4) gigabit interface on > >a box. This many interrupts seemed a bit too high, so I thought > >I should enable polling(4). After enabling it i've got 55K per > >second, even higher. > >I've just done "ifconfig em1 polling", and by this the number > >of interrupts increased. >=20 >=20 > How does vmstat -i look like before and after? lvs1:~# ifconfig em0 -polling; sleep 5; vmstat -i ;ifconfig em0 polling; sl= eep 5; vmstat -i (without polling on em0) interrupt total rate irq14: ata0 60 0 irq15: ata1 1 0 irq16: uhci0 twe0 2507 1 irq17: fxp0 4922443 1987 irq18: em0 3302239 1333 cpu0: timer 4952925 1999 Total 13180175 5321 (with polling on em0) interrupt total rate irq14: ata0 60 0 irq15: ata1 1 0 irq16: uhci0 twe0 2508 1 irq17: fxp0 4965974 2000 irq18: em0 3302338 1330 cpu0: timer 4962989 1999 Total 13233870 5331 Sincerely, Gergely Czuczy mailto: gergely.czuczy@harmless.hu --=20 Weenies test. Geniuses solve problems that arise. --TB36FDmn/VVEgNH/ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (FreeBSD) owHdVb+P3EQUPhKBIkuA8gcEPZKCi7LeG3vWt7s+XUK4gyQcUYq7CBGqWfvZnpw9 48yM925TQEtBgZBooAgdFQoFQgJRUtBAQcMfgPgbKOF577ws6A5dzRSr9Xvve78+ +5uPnj+/cu7iz199/e61Dz/+7Jkvn/tl0qsa51TuV8JMpfIDxgKfDzhjfsh9jqNU jIYTnqZJkEXDN55e+G1LK4fK+XuzGmNweOjW6lJItQFJIYxFt9m4zB95Xdy2tLW2 0kmtYpCqlAoXvj0jlM3Q+K+rRKdS5TE8arTD1K+NVE5MSvS8ewp2hevBm00J4agH IWNDEA6CMI7CmLGbd+EaI2MP7gqz31i4h9YZlEmBBg4MpYu963ALTY7lDLYe3N96 8A7YpDASJ63n+i2tU6i0UdRArzXceWWKoLSTCabA+Q617dCYpnZ2zWICWoFQgNXq 4CrkMhcT6Y5CMpEgedscAib6sA97hbRQCTVbygEWsaLMFEJApzUUMi96YDXcAVfo Ji/cvA2w9FCmgKrdBNS6pO3lVLUPNzPKduQgE7QNtE3n2kEU7UCNps1AzWqV9gCn qOZF0PQXAz5srINUK4TLMqO4TOY0U9CVudyjIVOYzKglmsEVtJKmmhwl1tnyPFIl BoXFlJJvhuz4B27rA8qPFqaVdUSYL6HUeh9KuY8wwUwbnJcQ7Sw3vHJqg/i9K7DU DAP/uJsNsCViDdHGUraNf4QuRW56/471vNUD2e7WdXEtiwS76i0GgVOP006Ux/+N cOhJ8ygYxPQWCnY6CtaXnGyOieaY4D8wsOQ8wqzH0BSJZOAO8KRqYUTfw9/wOWYY Q3ZYn9LbYByGgwHvAOPRcI4ZxfM1nnw4Z2HIxx2Gc+4ldcNIAGRFL+IpdaJwHEaL OuOxt7e0yJNOwIMRC4YdJuJhcMzc/5G20RL8LLStR+PhoIMzxs5GG+ddHaKNnYW2 9XA8WlB9NtraKsOui4hzom2XZAENaW7P8xbq+7hJHs+8SsjS6RjyI3M/mZtfpfuj KtHaftF4nu+3KvI2opIkIY40vU8irmRj6dHqkhSsNpp0sWrFiT5yYaTFvvfBjfPP rrQXVXfNXTz3wicrT6pPd36arH7/4x/9L17Kbr944df7+XcrT5L3f3hLv/zN9ueX 6j9/f2370tO1b3f/Ag== =r93p -----END PGP SIGNATURE----- --TB36FDmn/VVEgNH/--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20070731100315.GA34300>