Date: Thu, 03 Jun 2021 11:56:29 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 256375] iflib/if_em: unplugging network cable causes huge KTorrent slowdown Message-ID: <bug-256375-7501-fbl4KkbknN@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-256375-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-256375-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D256375 --- Comment #6 from Alexey Dokuchaev <danfe@FreeBSD.org> --- Created attachment 225522 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D225522&action= =3Dedit drace without iflib_admin_intr_deferred() call Alexander suggested commenting out iflib_admin_intr_deferred() call in sys/dev/e1000/if_em.c like this: > @@ -1564,7 +1564,7 @@ em_if_media_status(if_ctx_t ctx, struct ifmediareq = *ifmr) >=20=20 > INIT_DEBUGOUT("em_if_media_status: begin"); >=20=20 > - iflib_admin_intr_deferred(ctx); > + //iflib_admin_intr_deferred(ctx); >=20=20 > ifmr->ifm_status =3D IFM_AVALID; > ifmr->ifm_active =3D IFM_ETHER; This had caused minor, yet noticeable improvement in responsiveness: KTorre= nt now stays mostly in "select" state with occasional "e1000_" and rare "iflib" during which it's still stuck for several (vs several tens before) seconds,= but can nonetheless perform transfers again at reasonable speeds. However, it's still not as good as once I "kldunload if_em". --=20 You are receiving this mail because: You are the assignee for the bug.=
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