From owner-freebsd-arm@freebsd.org Sat Mar 17 20:06:05 2018 Return-Path: Delivered-To: freebsd-arm@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id A935FF6520B for ; Sat, 17 Mar 2018 20:06:05 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 465276C605 for ; Sat, 17 Mar 2018 20:06:05 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 7EA787689 for ; Sat, 17 Mar 2018 20:06:04 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id w2HK64H5071348 for ; Sat, 17 Mar 2018 20:06:04 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id w2HK64RR071346 for freebsd-arm@FreeBSD.org; Sat, 17 Mar 2018 20:06:04 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: freebsd-arm@FreeBSD.org Subject: [Bug 226682] ARMADA38X: Running out of CESA TDMA descriptors for disk I/O on GELI SSD Date: Sat, 17 Mar 2018 20:06:04 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: arm X-Bugzilla-Version: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Some People X-Bugzilla-Who: chris@mumac.de X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-arm@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.25 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 17 Mar 2018 20:06:05 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D226682 Bug ID: 226682 Summary: ARMADA38X: Running out of CESA TDMA descriptors for disk I/O on GELI SSD Product: Base System Version: CURRENT Hardware: arm OS: Any Status: New Severity: Affects Some People Priority: --- Component: arm Assignee: freebsd-arm@FreeBSD.org Reporter: chris@mumac.de While testing I/O performance on a SolidRun Clearfog Pro (ARMADA A38x) with= an SSD (PLEXTOR PX-128M6G-2242) encrypted by GELI AES-CBC, errors were reporte= d on the console/dmesg about running out of TMDA descriptors. Looking at sys/dev/cesa/cesa.h, the comments seem to focus on network buffe= rs with a maximum size of 1500 bytes while SSD disk I/O in my case would invol= ve 4KB buffers. Without really diving into the rest of the code, I've increased the values in cesa.h and can now operate the SSD with sustained rates ~200M= B/s without running out of TDMA descriptors. There might be better ways to do this but the "diff" below most certainly f= ixed my issue. Index: sys/dev/cesa/cesa.h =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --- sys/dev/cesa/cesa.h (revision 329554) +++ sys/dev/cesa/cesa.h (working copy) @@ -63,8 +63,8 @@ */ /* Values below are optimized for requests containing about 1.5 kB of data= */ -#define CESA_SA_DESC_PER_REQ 2 -#define CESA_TDMA_DESC_PER_REQ 8 +#define CESA_SA_DESC_PER_REQ (2 * 3) /* 4KB, not 1.5kB */ +#define CESA_TDMA_DESC_PER_REQ (8 * 3) /* 4KB, not 1.5kB */ #define CESA_SA_DESCRIPTORS (CESA_SA_DESC_PER_REQ * CESA_REQUES= TS) #define CESA_TDMA_DESCRIPTORS (CESA_TDMA_DESC_PER_REQ * CESA_REQUESTS) --=20 You are receiving this mail because: You are the assignee for the bug.=