From nobody Thu Aug 05 13:42:11 2021 X-Original-To: freebsd-current@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 981827CDF46 for ; Thu, 5 Aug 2021 13:42:23 +0000 (UTC) (envelope-from hps@selasky.org) Received: from mail.turbocat.net (turbocat.net [88.99.82.50]) (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 mx1.freebsd.org (Postfix) with ESMTPS id 4GgVCf3sXbz55pv for ; Thu, 5 Aug 2021 13:42:22 +0000 (UTC) (envelope-from hps@selasky.org) Received: from hps2020.home.selasky.org (unknown [178.17.145.105]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mail.turbocat.net (Postfix) with ESMTPSA id 0197A260266 for ; Thu, 5 Aug 2021 15:42:20 +0200 (CEST) To: freebsd-current From: Hans Petter Selasky Subject: AMD Ryzen 5 3400G with Radeon Vega Graphics Message-ID: Date: Thu, 5 Aug 2021 15:42:11 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4GgVCf3sXbz55pv X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of hps@selasky.org designates 88.99.82.50 as permitted sender) smtp.mailfrom=hps@selasky.org X-Spamd-Result: default: False [-1.31 / 15.00]; ARC_NA(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+a:mail.turbocat.net:c]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-current@freebsd.org]; DMARC_NA(0.00)[selasky.org]; RCPT_COUNT_ONE(0.00)[1]; NEURAL_HAM_LONG(-1.00)[-0.999]; NEURAL_HAM_MEDIUM(-1.00)[-0.997]; TO_DN_ALL(0.00)[]; NEURAL_SPAM_SHORT(0.99)[0.988]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:24940, ipnet:88.99.0.0/16, country:DE]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-ThisMailContainsUnwantedMimeParts: N Hi, I was lucky to get the hands on a mini-ITX containing a "AMD Ryzen 5 3400G with Radeon Vega Graphics". FreeBSD-13 installed just fine and 4K HDMI output works too with AMDGPU. However I noticed some problems with a webcamd DVB-T receiver, that it had lots of dropouts I couldn't understand. When I looked closer at this it turns out that something was blocking the threads for longer amounts of time, up to 100 ms at random. After some debugging I eventually found: sysctl machdep.idle machdep.idle: acpi machdep.idle_available: spin, mwait, hlt, acpi And when I set it to: sysctl machdep.idle=spin The problems I saw vanished. Anyone else having such experiences with Ryzen? --HPS