From nobody Wed Jan 5 05:41:21 2022 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 4304019205F1 for ; Wed, 5 Jan 2022 05:41:24 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: from mail-qv1-xf29.google.com (mail-qv1-xf29.google.com [IPv6:2607:f8b0:4864:20::f29]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1D4" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4JTJJ339qbz3Hy2 for ; Wed, 5 Jan 2022 05:41:23 +0000 (UTC) (envelope-from mavbsd@gmail.com) Received: by mail-qv1-xf29.google.com with SMTP id fq10so36572319qvb.10 for ; Tue, 04 Jan 2022 21:41:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:to:from:subject:message-id:date:user-agent:mime-version :content-language:content-transfer-encoding; bh=MODE71X0RsrsuBULb9x+g6l3a1BTy53+MhHprHNP+y4=; b=fYNs6Dxg03PGRmpxMoNYl7+B5BMPf1RVRnoYN62pP/h6t4eQP+kKL/ysSzsBFdRyXL HqU+OmtmGtD7txVFfBZpEhXdfSSLLCtkmEfHk9MzZ3sRiOybxRzEjA63/U974WVCZuqb 2MaVc2pW8EyHTnYgIDg11RJ9g3PsMjvo1q+iPS6/1cnrzxyrzd01Y9A53NfXxDF4d8oK BSjvAdrFEuStMC23s3vD1dVnK+q+PIfxIoAG2G0dNk5dGuSN9wC0/v0HpukR8foprLy3 h8NwCD4AvfecfUNyYvWEgSeD/2UMIFHVp7/diylplnjxGw2ojTTHR0cG9yogV/XtggMp Ki2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:to:from:subject:message-id:date :user-agent:mime-version:content-language:content-transfer-encoding; bh=MODE71X0RsrsuBULb9x+g6l3a1BTy53+MhHprHNP+y4=; b=m8rPCrjFleujmFRQa4k2VtjzLvrdVf0sCUwXF+caQ3hzviWJZXzv3rP8R8No6oWiKJ 41KOFc+vgSCR2oIIwsl5EVglwNBeQWaPO04TCMC0SBtVagYaaFOdK9s5auxEG7kI2/r4 b+dgFo0EAkg5nhPe6MHPyaPLOgrv10oiSqWbwcrMt3/zlzy7Bv/D9f5SvLtiAtKF6mtx 9YFpBk7ioigQEnN5p5N7CZxhgH9QVt5zLwrG3jIw0cCoAZysyhdgiks3nLGmJFfM501D Ciff+tgZU/jZOX4pTTDQOjrbP7VTnNRYKy/Q6wZeribeplXw6YBvGFwzKz8szyt5cqeW PTZw== X-Gm-Message-State: AOAM533DPq+Suwt1VDvCUW4QStZ4y5fo6NOoXpAXgNA7bkLG8k4S7F9V Af+vBqrqz8hrQPxkqjjCSuBGxbkKfH8= X-Google-Smtp-Source: ABdhPJx3nNaZzno7RR1TGl8Mr6wEuueXy0jpOT9/FWTuI1EXsrShZkgxqc6hsxfqLTgqLwXsvWs55w== X-Received: by 2002:a05:6214:19e1:: with SMTP id q1mr47700900qvc.115.1641361282587; Tue, 04 Jan 2022 21:41:22 -0800 (PST) Received: from spectre.mavhome.dp.ua (104-55-12-234.lightspeed.knvltn.sbcglobal.net. [104.55.12.234]) by smtp.gmail.com with ESMTPSA id z8sm35243152qta.50.2022.01.04.21.41.21 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 04 Jan 2022 21:41:22 -0800 (PST) To: "freebsd-current@freebsd.org" From: Alexander Motin Subject: atkbd_timeout() period? Message-ID: Date: Wed, 5 Jan 2022 00:41:21 -0500 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:78.0) Gecko/20100101 Thunderbird/78.13.0 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 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 4JTJJ339qbz3Hy2 X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20210112 header.b=fYNs6Dxg; dmarc=none; spf=pass (mx1.freebsd.org: domain of mavbsd@gmail.com designates 2607:f8b0:4864:20::f29 as permitted sender) smtp.mailfrom=mavbsd@gmail.com X-Spamd-Result: default: False [-0.22 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FORGED_SENDER(0.30)[mav@FreeBSD.org,mavbsd@gmail.com]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; MID_RHS_MATCH_FROM(0.00)[]; FROM_NEQ_ENVFROM(0.00)[mav@FreeBSD.org,mavbsd@gmail.com]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; SUBJECT_ENDS_QUESTION(1.00)[]; ARC_NA(0.00)[]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20210112]; FROM_HAS_DN(0.00)[]; TO_DOM_EQ_FROM_DOM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-current@freebsd.org]; DMARC_NA(0.00)[FreeBSD.org]; NEURAL_SPAM_MEDIUM(0.98)[0.979]; RCPT_COUNT_ONE(0.00)[1]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::f29:from]; TO_DN_EQ_ADDR_ALL(0.00)[]; RCVD_TLS_ALL(0.00)[] X-ThisMailContainsUnwantedMimeParts: N Hi, As I see, one of the most active threaded callouts on idle VMware VM and some hardware is atkbd_timeout(), called 10 times per second. Plus it is also one of few remaining non-MP-safe callouts. According to the comment it seems to be only a workaround for some lost interrupts. That makes me thing: is it really needed to run so often and so accurate, or may be we could reduce it to 1-2 times per second? Or may be it can be avoided somehow 20 years later? -- Alexander Motin