From nobody Tue Jun 07 13:39:03 2022 X-Original-To: freebsd-arm@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 457973EBBED for ; Tue, 7 Jun 2022 13:39:08 +0000 (UTC) (envelope-from markjdb@gmail.com) Received: from mail-qk1-x72b.google.com (mail-qk1-x72b.google.com [IPv6:2607:f8b0:4864:20::72b]) (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 4LHWfg2Gd6z3kZl for ; Tue, 7 Jun 2022 13:39:07 +0000 (UTC) (envelope-from markjdb@gmail.com) Received: by mail-qk1-x72b.google.com with SMTP id n197so6136209qke.1 for ; Tue, 07 Jun 2022 06:39:07 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=ybJpaw6lVVhtPZwlU3Ps31oJuJOnVxdrz4VoXlX2gwA=; b=l0htubjhpW570soxYJThXxYTWvD7WMBUojnHmnPQUCbBZ36ibuDWjyeUWG6+sjYiNm BrJctcjupBDKt+uX0vhvl2OW2uE+57NGcccsGzWeN4bnIqe0jdzF5GTDw1Rfa05IWfa5 MU4RH1JJ7bycCq/cJx8BOk+qyvWZFCntGWs8Rn1y7+vw0VTcaTs7xVN/1JIJaiExzmDX NwFP4crCM0oQ05ynSi+b1owh0gTPWc1Xl+ruZQOlR/foiygDK989Iyr3TvDhroV/6yOo mbl7wYsr9Ron3QCVqIDWEZTdaC0DNt4VjJ0J2JlDMvEhelz8An7XigSrVzZC/Km5QY7/ AFLw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=ybJpaw6lVVhtPZwlU3Ps31oJuJOnVxdrz4VoXlX2gwA=; b=NHqTRPISqgGONUw0N0OtGZIrJJE2Miu01C+rvJT9mgklPI7qB34OQ4C54DkpWF1Rf8 MH2lqByUUxyQptTYfE50JSNk3nPWU2+htKDWZKYVa7uUe90satil/j4Jf0U4F4mI7cIw 2ko1Kw8ptEl65xtx/gzSo/ww0RQjXRXob8Dh0EVMPiUenPWgJuq2oxYbdpjkOnFOxxJ9 wWCF++CUsUAO/Ktw2nsN02ah5mRlL1985LM+UvIaAYZA/z3JnmqqgySdPTPhy0vwTFcz MudCXmNVnRK35DwnnXmjkmnamaV6OPPsPZiV3OmaarEND4tCztcPbu+5cF/zSMQca9Q5 buIA== X-Gm-Message-State: AOAM533ZyAW6sxn/oWpWi2ki3ZhhkPyzUIOD6PZAhJnBp4CqS5fxTgOk yxXih3sGFQ0Oa67P0XmmIDZLHByrgMM= X-Google-Smtp-Source: ABdhPJy+O6yv5O++UicQZ2ToYQ0TAyO37LVOqXhcWNgPhzglpVqXFUircazoejz1OLIp5l1jKFPxcw== X-Received: by 2002:a05:620a:2903:b0:6a6:d578:afce with SMTP id m3-20020a05620a290300b006a6d578afcemr2595605qkp.703.1654609146843; Tue, 07 Jun 2022 06:39:06 -0700 (PDT) Received: from nuc (198-84-189-58.cpe.teksavvy.com. [198.84.189.58]) by smtp.gmail.com with ESMTPSA id hh8-20020a05622a618800b00304f3e320f2sm1978632qtb.4.2022.06.07.06.39.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 07 Jun 2022 06:39:06 -0700 (PDT) Date: Tue, 7 Jun 2022 09:39:03 -0400 From: Mark Johnston To: Christian Ullrich Cc: "freebsd-arm@freebsd.org" Subject: Re: aarch64 and kqueue timer events Message-ID: References: <03ff40c7-b755-8421-713c-90aa4d8535fe@shrew.net> <303b3e3a-7856-afdd-dd0b-9fd0d486215f@chrullrich.net> List-Id: Porting FreeBSD to ARM processors List-Archive: https://lists.freebsd.org/archives/freebsd-arm List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-arm@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <303b3e3a-7856-afdd-dd0b-9fd0d486215f@chrullrich.net> X-Rspamd-Queue-Id: 4LHWfg2Gd6z3kZl X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20210112 header.b=l0htubjh; dmarc=none; spf=pass (mx1.freebsd.org: domain of markjdb@gmail.com designates 2607:f8b0:4864:20::72b as permitted sender) smtp.mailfrom=markjdb@gmail.com X-Spamd-Result: default: False [-2.27 / 15.00]; TO_DN_EQ_ADDR_SOME(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; RCVD_COUNT_THREE(0.00)[3]; DKIM_TRACE(0.00)[gmail.com:+]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_HAM_SHORT(-0.94)[-0.939]; FORGED_SENDER(0.30)[markj@freebsd.org,markjdb@gmail.com]; MIME_TRACE(0.00)[0:+]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; FROM_NEQ_ENVFROM(0.00)[markj@freebsd.org,markjdb@gmail.com]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.63)[-0.632]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20210112]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-arm@freebsd.org]; DMARC_NA(0.00)[freebsd.org]; TO_MATCH_ENVRCPT_SOME(0.00)[]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::72b:from]; MLMMJ_DEST(0.00)[freebsd-arm]; MID_RHS_NOT_FQDN(0.50)[]; RCVD_TLS_ALL(0.00)[] X-ThisMailContainsUnwantedMimeParts: N On Tue, Jun 07, 2022 at 08:23:00AM +0000, Christian Ullrich wrote: > * Matthew Grooms wrote on 2021-07-25: > > > On 7/24/2021 8:18 PM, Matthew Grooms wrote: > > >> I'm seeing some strange behavior with kqueue timers on my aarch64 > >> host. Here is a simple test program that I've compiled on both amd64 > > >> When I compile and run the code on an amd64 host, everything works as > >> expected. The event timer expires once every 3 seconds ... > >> However, when I compile and run the same code on an aarch64 host ( > >> rpi4b ), something very different happens. The event timer expires > >> after 3 seconds the first time. But each subsequent expiration is for > >> exactly twice the defined interval, 6 seconds ... > > > FreeBSD generic 13.0-STABLE FreeBSD 13.0-STABLE #8 > > stable/13-n246015-ade8b810b02-dirty: Tue Jun 15 21:04:38 CDT 2021 > > Hello, > > I see the same on 13.1-RELEASE (releng/13.1) (double interval after the > first) vs. 13.0-RELEASE-p7 (releng/13.0) (expected interval), on a Pi 3B+. > > Did you ever find a solution? The bug was fixed recently, unfortunately after 13.1 was released. See https://cgit.freebsd.org/src/commit/?id=524dadf7a8725dea144571843e611dbdbd59d668 We plan to release an erratum with a patch for 13.1.