Date: Fri, 28 Jun 2013 18:57:58 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Adrian Chadd <adrian@freebsd.org> Cc: Alexander Motin <mav@freebsd.org>, hackers@freebsd.org Subject: Re: b_freelist TAILQ/SLIST Message-ID: <20130628155757.GS91021@kib.kiev.ua> In-Reply-To: <CAJ-VmonKubEaU1RQ=D49SEj%2BmusP7d0vOVHy%2BiU_aXtc0Zowuw@mail.gmail.com> References: <51CCAE14.6040504@FreeBSD.org> <20130628065732.GL91021@kib.kiev.ua> <51CD4FEA.7030605@FreeBSD.org> <CAJ-VmonKubEaU1RQ=D49SEj%2BmusP7d0vOVHy%2BiU_aXtc0Zowuw@mail.gmail.com>
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--C6XIXe15e7wzRDAo Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Fri, Jun 28, 2013 at 08:14:42AM -0700, Adrian Chadd wrote: > .. i'd rather you narrow down _why_ it's performing better before committ= ing it. >=20 > Otherwise it may just creep up again after someone does another change > in an unrelated part of the kernel. Or penalize some other set of machines where this is currently not a proble= m. The cause should be identified before any change is committed. >=20 > You're using instructions-retired; how about using l1/l2 cache loads, > stores, etc? There's a lot more CPU counters available. >=20 > You have a very cool problem to solve. If I could reproduce it locally > I'd give you a hand. >=20 > Thanks, >=20 >=20 >=20 > -adrian --C6XIXe15e7wzRDAo Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.20 (FreeBSD) iQIcBAEBAgAGBQJRzbKFAAoJEJDCuSvBvK1BsVIP/i0Q4nw6m5WKkM08yyJnYbTb XHp1e4d5CMwiTZUkkt6gfffJoDTY6q1oyBjzgVja3hdg1WK4dCUk5pUriQMiefWp ZyVvSVeIDRzhLX5cHbUFpsgFfYkNYaMBNcL+zxbetQciVDN7D/yosKKWoRGaUNiI Baio6XTieZnTaIwZItOI0m3Yjci3IrEJMmZ/5IkofCo20VlVFKLSd/ZHMkQRH+wq XQQra04zGkzg4DQA8ay1ErVOx5x0+tPvPGB8ecFLfGckfIzdSUxjiCXPob7hYqhF zvoUmSmAtkcn7hJ5UWYI/Q2va3dQA2qCdiayeqWiR/o79u1+WJGJrWFpLDTfUGz5 uyhIeNv7z+aZ8ld/OP4JJ/GHNjdmtDfNsQYKOiwoF4wz1+Cz/4yKt0F7EDb2NJIU 5r3HKFLe6QDp6it0u9frVDKmXRZkV3pl3d7Pj/x4LiAe7Xp2O6f1h38AeROL5NNl yENrnT+mwYuBB9cNveAbXn/nLL9pErneoXGJ4aa1iJpItfHRJuDyIaqvWr4q22Jj 8Exhb9r/IOLUs0+niG2XL1q5xhCaACaYkIqO7Y0B/VRKv/f69AOyldBtDa+bdRV+ fe2AgUbZKl3WATDIT4yPN5Hd7j1UXk21iSV4mYTEl/UdO9G9p9ITCfqzaycJhrJd N/q5UDbkjRW/wFuv9T9s =NHjw -----END PGP SIGNATURE----- --C6XIXe15e7wzRDAo--
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