Date: Wed, 30 Oct 2002 16:16:46 +0100 From: Stijn Hoop <stijn@win.tue.nl> To: ak03@gte.com Cc: drosih@rpi.edu, raymond.j.kohler@lmco.com, current@freebsd.org Subject: Re: speed of -CURRENT [was: questions about the state of current] Message-ID: <20021030151646.GK95942@pcwin002.win.tue.nl> In-Reply-To: <20021030074814.3e3c43ea.kabaev@bellatlantic.net> References: <2570443.1035916854787.JavaMail.wshttp@emss03g01.ems.lmco.com> <p05111704b9e49bd4f317@[128.113.24.47]> <20021030091356.GC94770@pcwin002.win.tue.nl> <20021030074814.3e3c43ea.kabaev@bellatlantic.net>
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On Wed, Oct 30, 2002 at 07:48:14AM -0500, Alexander Kabaev wrote:
> > I am experiencing a really noticable slower startup time on my very
> > recent-CURRENT laptop for almost all programs. The problem seems to be
> > in getting info in the cache, because it disappears when I start the
> > same program again.
>=20
> This almost certainly is caused by the 'ioslow' addition to
> specfs_vnops.c. Find a block in specfs_strategy function which goes into
> tsleep for niced processes and comment it out. Let us know if that helps
> :)
Yes, that's it. -CURRENT actually feels snappier than -STABLE now :)
Below is the diff that I used. Will something other than I/O for
niced processes break using this?
Thanks!
--Stijn
--- spec_vnops.c.orig Mon Oct 28 08:07:49 2002
+++ spec_vnops.c Wed Oct 30 14:22:01 2002
@@ -530,17 +530,19 @@
struct mount *mp;
int error;
struct cdevsw *dsw;
- struct thread *td =3D curthread;
+/* struct thread *td =3D curthread; */
=09
/*
* Slow down disk requests for niced processes.
*/
+/* XXX: per Alexander Kabaev mail 2002/10/30 07:48 -5
if (td && td->td_ksegrp->kg_nice > 0) {
mtx_lock(&strategy_mtx);
msleep(&strategy_mtx, &strategy_mtx,
PPAUSE | PCATCH | PDROP, "ioslow",
td->td_ksegrp->kg_nice);
}
+*/
bp =3D ap->a_bp;
vp =3D ap->a_vp;
if (bp->b_iocmd =3D=3D BIO_WRITE) {
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