From owner-freebsd-hackers@freebsd.org Wed Feb 19 08:44:03 2020 Return-Path: Delivered-To: freebsd-hackers@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id DA44D25333E; Wed, 19 Feb 2020 08:44:03 +0000 (UTC) (envelope-from babupalit@gmail.com) Received: from mail-ot1-x32f.google.com (mail-ot1-x32f.google.com [IPv6:2607:f8b0:4864:20::32f]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 48MrqP5NsQz44Ff; Wed, 19 Feb 2020 08:44:01 +0000 (UTC) (envelope-from babupalit@gmail.com) Received: by mail-ot1-x32f.google.com with SMTP id 59so22374795otp.12; Wed, 19 Feb 2020 00:44:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=dAD/IkF8ebZ665SDZJVBjGrvclsHc0hA8qyeedckxmI=; b=Ts4WnTO/uLgrZSc+g6SBsVmqtYppMUCtlPGEhaY9PK3NRk/Mh0EGUuYrloZI0/3DJ/ eJ+NHlmA1353snO+6g2ezKOuVhU8YWssmrOl8y7ADcAK+AcD0G276+lukVklNkRASGge Xzj/F9X8l5tCgEeH16Zw93qSJCWGat0HUe4+lbL/dV6cEDmr1sA6LeHFJHD7ivJaDC+y NH6SEp866kxDXVvhQi3+Ewd357gexT43ADe+4wa+e+tAvecenm1NbASnWMgO6x8WxjWN M0pfD+iPl+gux2HEyvVq39+HF4ZBcJo7nSmNx90k5ovWHMijv94H2+VemtWe+t3u5E89 yTGw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=dAD/IkF8ebZ665SDZJVBjGrvclsHc0hA8qyeedckxmI=; b=SJ49Z3/b2wWVDKzQPdc7ZsIB37jT2/lf2LhBUv2/9m8cYohlZrxg6tBJw8LUtnfVB7 XOVni4HOYWrKS1pxDU0vb7Lg2UxzbrcpVunl/3DFSE+MmwD2/kSSTG8xjQ88NKVOU17V /ULuxa/xWXFCvxFp7ZCzFwdcZqo1MUahQhWPQs5qfEsCJKAGDP9CG8yvNzGadoJMzyjE CtM2GttkOvxgaaU2HzImdq2RUC5sTPxRv7qRqnBrrCS73idPKSzIvzYinzoa6VMfhkML Oatmog/FEuUXZnrIf7ZUZlNW0zaN9u3frc0bpYhlVV44r2kUlZouRKhWI+pQBH7uF1// yY4A== X-Gm-Message-State: APjAAAUHunk3U0YVBOfurzqzflEd9Ea4DGVrfE5LjAG3pzJ9H6pCKM1J /s7yqcQdvrN62nZG+1EksL6m0cevGL9cvwV+FOqbgZYP X-Google-Smtp-Source: APXvYqzGQczGEAQqIWJvqfw7Jap9mmygdGCgPKR5XN3xLEoFQYTWT13dQilWFfYiQ38f9dgcnG5JahYJuxDvd8cEO38= X-Received: by 2002:a05:6830:139a:: with SMTP id d26mr19542074otq.75.1582101839884; Wed, 19 Feb 2020 00:43:59 -0800 (PST) MIME-Version: 1.0 From: Arpan Palit Date: Wed, 19 Feb 2020 14:13:48 +0530 Message-ID: Subject: msleep_spin is failed to waken up even after wakeup routine is invoked for the same. To: freebsd-hackers@freebsd.org, freebsd-questions@freebsd.org X-Rspamd-Queue-Id: 48MrqP5NsQz44Ff X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=Ts4WnTO/; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of babupalit@gmail.com designates 2607:f8b0:4864:20::32f as permitted sender) smtp.mailfrom=babupalit@gmail.com X-Spamd-Result: default: False [-3.00 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36:c]; FREEMAIL_FROM(0.00)[gmail.com]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; TO_DN_NONE(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; IP_SCORE_FREEMAIL(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; IP_SCORE(0.00)[ip: (-7.81), ipnet: 2607:f8b0::/32(-1.89), asn: 15169(-1.68), country: US(-0.05)]; DKIM_TRACE(0.00)[gmail.com:+]; RCPT_COUNT_TWO(0.00)[2]; RCVD_IN_DNSWL_NONE(0.00)[f.2.3.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.4.6.8.4.0.b.8.f.7.0.6.2.list.dnswl.org : 127.0.5.0]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[]; DWL_DNSWL_NONE(0.00)[gmail.com.dwl.dnswl.org : 127.0.5.0] Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 Feb 2020 08:44:03 -0000 Hi, I am facing one issue where wakeup rountine call is unable to waken up a msleep_spin routine call with a timeout value of 10 Seconds. The real scenario is as follows: post a hardware command and sleep using msleep_spin routine till interrupt comes, After getting the interrupt waken up the sleeping process using wakeup_one/wakeup routine call. As there are more than 2048 command and 16 parallel threads are running, observed randomly *one or two of the posted command* is *timing out* for which the *interrupt has came and also wakeup routine is invoked *after getting the interrupt for the same command. Note: *The issue is not seen when number of commands are less than 2048 with timeout of 10 seconds. *The issue can be seen with less number of commands also when timeout value 1 second. Can anyone please provide me an optimized way to schedule the process or a better way to do the scheduling. Thanks, Arpan Palit