From nobody Tue Jul 26 10:51:15 2022 X-Original-To: bugs@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 4LsYcM33K1z4WfGr for ; Tue, 26 Jul 2022 10:51:15 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4LsYcM05lKz3pgG for ; Tue, 26 Jul 2022 10:51:15 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4LsYcL6HLGzZGS for ; Tue, 26 Jul 2022 10:51:14 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 26QApEUA051115 for ; Tue, 26 Jul 2022 10:51:14 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 26QApEOs051102 for bugs@FreeBSD.org; Tue, 26 Jul 2022 10:51:14 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 238733] kvm disk i/o extremely slow Date: Tue, 26 Jul 2022 10:51:15 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 13.0-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: a.shikov@itcons.net.ua X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@freebsd.org MIME-Version: 1.0 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1658832675; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=G21lKEkpi3GpcIabm5j4L5DIfo8Om1jSINXRkFFm0JQ=; b=rOe7jnhkSOlfxba8IEw89H5eOAptmOQmrPM2VayYE5HOdDVEY0GOJmK1s1p0ORwgdQuwhf GVqMaPpB/rl1prV5pX8HyYxqEOKZclPEq1WYPE0DCXzppXRe1yCw1K0h0hV3SAcJw6WojD CwCiJL2guGRd3Frlln7zPHFzFUGX2eAHCZrQQyBVQ6b1/c4j27jAzGVKGhp8XJCva6Q2mU tZFa8VlyBAbcOCPMjmr359XgXaT3bztiespMVmdrsRZ1FoYzgNtWnTc8s7c2va4FkH3C8m oV5n35fONLLmxWi68tvLr/0HZ3DrRlCJIwGg78+HDfUgqimCspDxJEHXaTdbtQ== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1658832675; a=rsa-sha256; cv=none; b=AhpxJYwf+WQlAIhK3esXReaxqGmjcWvuJOBkZzT+1Dx6fh5NP7Sd21iYeIJ/BMC9aPk4Xz Xv7DyJVMum2W+BsO4hOf2+fPme5MxRsTh/TG4HCx+f+yQaP4sLnoCivYA0MBdQm8qLli3m nqYxET9+g04Ed+hKDKpG9v0TQXNyj+ZbchcCo3qqxhaGsVqRAlkN96j06o0q1o6t/LnMOv Yo3tG0907oy8ewE12OuwldLSu3/sV63tkOYRiHjsKIgy2gUgqgEg7przZBY0HdPUe/+zwO z+HTx3YzFsOVq903H9MwkBJxzBQwHGRIiqEl7H0+zPia0Wsa/MSMfIdwlzMWVQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D238733 --- Comment #5 from Alexander Shikov --- Hello! It seems I have the same issue with 13.1-RELEASE running as guest in Proxmox 6.4-15. vtblk0: on virtio_pci1 vtblk0: 40960MB (83886080 512 byte sectors) # dd if=3D/dev/random of=3Dtest.dat bs=3D1M count=3D100 iflag=3Dfullblock 100+0 records in 100+0 records out 104857600 bytes transferred in 14.858133 secs (7057253 bytes/sec) sysctl kern.timecounter.hardware HPET or TSC-low does not affect the issue. Linux Mint on the same host machine: # dd if=3D/dev/urandom of=3Dtest.dat bs=3D1M count=3D100 iflag=3Dfullblock 100+0 records in 100+0 records out 104857600 bytes (105 MB, 100MiB) copied, 0,588288 s, 178 MB/s If switch VirtIO Block to SATA in VM configuration then speed changes to better: ada0 at ahcich0 bus 0 scbus2 target 0 lun 0 ada0: ATA-7 SATA device ada0: Serial Number QM00005 ada0: 150.000MB/s transfers (SATA 1.x, UDMA5, PIO 8192bytes) ada0: Command Queueing enabled ada0: 40960MB (83886080 512 byte sectors) # dd if=3D/dev/random of=3Dtest.dat bs=3D1M count=3D100 iflag=3Dfullblock 100+0 records in 100+0 records out 104857600 bytes transferred in 0.354972 secs (295396745 bytes/sec) --=20 You are receiving this mail because: You are the assignee for the bug.=