From nobody Fri Mar 01 19:43:29 2024 X-Original-To: freebsd-stable@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4TmdnG454Lz5Cx0m for ; Fri, 1 Mar 2024 19:43:46 +0000 (UTC) (envelope-from lexi@le-fay.org) Received: from thyme.eden.le-Fay.ORG (THYME.EDEN.LE-FAY.ORG [81.187.47.194]) by mx1.freebsd.org (Postfix) with ESMTP id 4TmdnF3DZcz4mWK for ; Fri, 1 Mar 2024 19:43:45 +0000 (UTC) (envelope-from lexi@le-fay.org) Authentication-Results: mx1.freebsd.org; none Received: from iris.eden.le-Fay.ORG (IRIS.EDEN.LE-FAY.ORG [IPv6:2001:8b0:aab5:106:3::6]) by thyme.eden.le-Fay.ORG (Postfix) with ESMTP id F2101AB; Fri, 1 Mar 2024 19:43:29 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=le-fay.org; s=thyme; t=1709322210; bh=cyZD5sJxn/EehpfDuBYBHskdFxm/9YmFBLJQRoXBRZ4=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=ka7aKoW2ynk8a2fwoTFMGzOdxMfSclGSEMEIinHfCLSgVya0N4vA8pxY7Ki//d+x0 hcbJbY1/hRnCfCUAvyiLT1R0wfb25frkl27t7eSVxXUTrxCVtTsaOfTIfaYR+f5ir9 utcMujCkuXqSqqjzwNZ3JB8jFSgTSiEEf2XvSLQ8= Received: from ilythia.eden.le-fay.org (ILYTHIA.EDEN.LE-FAY.ORG [IPv6:2001:8b0:aab5:106:3::10]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1) server-digest SHA384) (No client certificate requested) by iris.eden.le-Fay.ORG (Postfix) with ESMTPSA id CEE712C041C; Fri, 1 Mar 2024 19:43:29 +0000 (GMT) Date: Fri, 1 Mar 2024 19:43:29 +0000 From: Lexi Winter To: Juraj Lutter Cc: FreeBSD stable Subject: Re: CPU hog in vnlru and arc_prune on 13-STABLE Message-ID: Mail-Followup-To: Juraj Lutter , FreeBSD stable References: List-Id: Production branch of FreeBSD source code List-Archive: https://lists.freebsd.org/archives/freebsd-stable List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-stable@freebsd.org X-BeenThere: freebsd-stable@freebsd.org MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="9hYQUd4wgAE5mdej" Content-Disposition: inline In-Reply-To: X-Spamd-Bar: ---- X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:20712, ipnet:81.187.0.0/16, country:GB] X-Rspamd-Queue-Id: 4TmdnF3DZcz4mWK --9hYQUd4wgAE5mdej Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Juraj Lutter: > I have a fresh (git b9880e247b26) 13.3-STABLE running in bhyve with 2 vCP= U and 10G of RAM. >=20 > I=E2=80=99ve put some load on it (building lang/rust from ports outside p= oudriere, using make -j2) and the system > started to respond very slowly. >=20 > I did break the make process and I was able to look into top where there = was: >=20 > PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND > 0 root -8 - 0B 1808K CPU1 1 35:53 99.79% kernel= {arc_prune} > 15 root 20 - 0B 16K RUN 0 34:19 99.35% vnlru this could be [0]: "High CPU usage by arc_prune; analysis and fix". [0] https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D275594 --9hYQUd4wgAE5mdej Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQGzBAABCAAdFiEEuwt6MaPcv/+Mo+ftDHqbqZ41x5kFAmXiL94ACgkQDHqbqZ41 x5mZoQv/ctI8kZYBwX37vKgcQQzp23i1z2VsOIasiY0ubiiFpRWhwPOWCiL0mSWp 29nB5D+d1zxgv2n0fAvnsx1GXfktnlYy9eMECC42Yw2Bop61JsBHCuH83kS08Kvk i25q5VU4keRf+YstHtqncaqzcpsX0VrQGhh8zyUTK2q/3otxp1/ETJ1WLF8oazZO +HDVacB5mTj4sDOhrnChn8ZFTiut27jAfMpr0E7KF6Xkw2hbRymNHU8wDerEzrwo OkI0qTG3KjrvlH+cHbDx17JhBPkxqAHuEe694U/gTG4H13kIYmlt9/ZFTuff6y+O rjun633AFN4N4yA9fsGJoVRPiGUyBcvdF2y+Kr+ZWqwObKhmJfYlWC7PwROcP72o 9ajCo4fZ0xBK15qjv04n15NwKJnYfCihrey0PNLx5roEzVxVnseB1QnZ2sg3gQJW wrEbTeIK/pNDxpfaam7M9gkngwqHDA0O8W6oU4b4EbPZLD1OZl5XY5GlzlrUUY2W GEHzMvlQ =Xe2w -----END PGP SIGNATURE----- --9hYQUd4wgAE5mdej--