Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1t3d8d-00DiZ2-6M for pgsql-hackers@arkaria.postgresql.org; Wed, 23 Oct 2024 15:19:07 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.94.2) (envelope-from ) id 1t3d8b-00Ajnu-FV for pgsql-hackers@arkaria.postgresql.org; Wed, 23 Oct 2024 15:19:05 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1t3d8b-00Ajnl-5o for pgsql-hackers@lists.postgresql.org; Wed, 23 Oct 2024 15:19:05 +0000 Received: from mail-io1-xd2a.google.com ([2607:f8b0:4864:20::d2a]) by magus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1t3d8V-002aKi-JE for pgsql-hackers@lists.postgresql.org; Wed, 23 Oct 2024 15:19:04 +0000 Received: by mail-io1-xd2a.google.com with SMTP id ca18e2360f4ac-83ac4dacaf9so164652839f.2 for ; Wed, 23 Oct 2024 08:18:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1729696737; x=1730301537; darn=lists.postgresql.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=yMWa9nc86JMwxIsYII6na6Wk8zLvhUZogHzdWIX4bb8=; b=RvizrNeB3TOwVPft69dag9DPuOu5EonclgFlBt3OdYxZaSfeXfdGGZ4mY5vnOTUhUV M40sUNzbW8hIGqE80QXYA1zUuKzJMEbCeMkk26GUAYQ00qq1OSMlI9qOp+ahXTjiJs1v jQkaKbh3sXKj+Xno6f/1zj7GA33qgngC/sRKStppa2mjVBmMqPgD3tgjHdNUkURsfV6F wcgRkFZWKGWlI1DfrRr2iDOXIofS1sjxBPne2TyfN6s2FnE7W3e/7nfu30HVLS8FW78d FgcmZ/CqbNn99Dzv4aBge9bf+g8yWFaLlvbnmyTfQ/vR0rYPEPVys28Zc0AgaFO2M7Sb OfBA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1729696737; x=1730301537; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=yMWa9nc86JMwxIsYII6na6Wk8zLvhUZogHzdWIX4bb8=; b=JTuZGbozP+WoazfgrjBk/zvTef1NiX0PIodnw4x9vpgTwcAvsMbKqOx5AVJaZyS3X+ OH0iA4qt+nvR3ERrPPUtqemX/Ph6Yq5H/5gXDxxNjm7scZXTJknXT2HSoAFFgFvsPRoF p9Eqp0/Hpb9vUC7gPfJYKxz8fWyUwtisEX1ZIpu6/jQo3+T6e13i/6BOEMKSSQkwqylY LrMKO/NmxW4vJTeJar/sFzOL9LN2i9pUPTB4tM7XADxz0PLqW0dcoHtknoVU0EMQWbtJ L1snUJDkTuaQ7Nj+utK24BbE1985O066g+L0LUga1OjWB9s8BqcRyMrJWJMRWtxaVt+P EORQ== X-Gm-Message-State: AOJu0YxR8QyMWhzPB5f9C4095vP8G4obmpucr+u2/ActvmLHJroQYALd PdHa72Ui77X2Qq2qkHgn7asGaoksfqBB7GF+7cRYe5JaDCOT7fDa X-Google-Smtp-Source: AGHT+IHVrdONatAjpAQK3ZlZLQFzocOqiACe7azjoKPXLDPqVNs4AUQeG+EeT9Zr9+HQS9YjEgm2lw== X-Received: by 2002:a05:6602:3fce:b0:82a:4419:6156 with SMTP id ca18e2360f4ac-83af641b91fmr356012539f.14.1729696737200; Wed, 23 Oct 2024 08:18:57 -0700 (PDT) Received: from nathan (162-195-168-172.lightspeed.stlsmo.sbcglobal.net. [162.195.168.172]) by smtp.gmail.com with ESMTPSA id 8926c6da1cb9f-4dc2a661e2dsm2091544173.168.2024.10.23.08.18.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Oct 2024 08:18:56 -0700 (PDT) Date: Wed, 23 Oct 2024 10:18:55 -0500 From: Nathan Bossart To: Jingtang Zhang Cc: pgsql-hackers@lists.postgresql.org Subject: Re: use a non-locking initial test in TAS_SPIN on AArch64 Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk On Wed, Oct 23, 2024 at 09:46:56AM -0500, Nathan Bossart wrote: > I have a couple of Apple M-series machines I can test, too. After some preliminary tests on an M3, I'm not seeing any gains outside the noise range. That's not too surprising because it's likely more difficult to create a lot of spinlock contention on these smaller machines. But, at the very least, I'm not seeing a regression. -- nathan