Date: Mon, 26 Apr 2010 18:07:56 +0000 (UTC) From: Pyun YongHyeon <yongari@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r207238 - stable/8/sys/dev/sge Message-ID: <201004261807.o3QI7u6M059663@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: yongari Date: Mon Apr 26 18:07:55 2010 New Revision: 207238 URL: http://svn.freebsd.org/changeset/base/207238 Log: MFC r207071: Intialize interrupt moderation control register. The magic value was chosen by lots of trial and errors. The chosen value shows good interrupt moderation without additional latency. Without this change, controller can generate more than 140k interrupts per second under high network load. Submitted by: xclin <xclin <> cs dot nctu dot edu dot tw > Modified: stable/8/sys/dev/sge/if_sge.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/amd64/include/xen/ (props changed) stable/8/sys/cddl/contrib/opensolaris/ (props changed) stable/8/sys/contrib/dev/acpica/ (props changed) stable/8/sys/contrib/pf/ (props changed) stable/8/sys/dev/xen/xenpci/ (props changed) stable/8/sys/geom/sched/ (props changed) Modified: stable/8/sys/dev/sge/if_sge.c ============================================================================== --- stable/8/sys/dev/sge/if_sge.c Mon Apr 26 18:04:33 2010 (r207237) +++ stable/8/sys/dev/sge/if_sge.c Mon Apr 26 18:07:55 2010 (r207238) @@ -1551,10 +1551,13 @@ sge_init_locked(struct sge_softc *sc) /* * XXX Try to mitigate interrupts. */ + CSR_WRITE_4(sc, IntrControl, 0x08880000); +#ifdef notyet if (sc->sge_intrcontrol != 0) CSR_WRITE_4(sc, IntrControl, sc->sge_intrcontrol); if (sc->sge_intrtimer != 0) CSR_WRITE_4(sc, IntrTimer, sc->sge_intrtimer); +#endif /* * Clear and enable interrupts.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201004261807.o3QI7u6M059663>