From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS22989 209.51.188.0/24 X-Spam-Status: No, score=-3.7 required=3.0 tests=AWL,BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id 13D981F463 for ; Sun, 29 Dec 2019 09:30:07 +0000 (UTC) Received: from localhost ([::1]:50322 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ilUth-0006so-Pl for normalperson@yhbt.net; Sun, 29 Dec 2019 04:30:05 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:43780) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ilUtb-0006sL-Sp for bug-gnulib@gnu.org; Sun, 29 Dec 2019 04:30:00 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ilUta-0001z7-UY for bug-gnulib@gnu.org; Sun, 29 Dec 2019 04:29:59 -0500 Received: from mo6-p01-ob.smtp.rzone.de ([2a01:238:20a:202:5301::10]:23876) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ilUta-0001ul-FI; Sun, 29 Dec 2019 04:29:58 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1577611796; s=strato-dkim-0002; d=clisp.org; h=References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: X-RZG-CLASS-ID:X-RZG-AUTH:From:Subject:Sender; bh=piDNy1arPXb+LrekG981+AqapUTl2xtSpR+N5mtzYPo=; b=fJfKkDB9pdEKlJjoo/3xwMU9tUE8Ztx+eR9oELRzVLX/ocql2lGg8xgJX6UynVuhou L/UcAWKcA1dG/hE7norpzp0m5QCNtBSCIDUadQ7cB6X9Z3zGndLG8SPLKFDF5zVOq5Xi T9EZn8WQgpYhTtRWKrmg8vuEQUk3rMWHBAp8VocQJKqObOeEbBpDPIffxXbK3zQYglwz lF148drmy4hWCexOTqJOpxFyzVSz7Vjp7h+Ugm+raASSBqSRElCwOldzSNChhkp/bfAh x5wGWkuEFKFetM6W2+HBX9OTBxTCx0w+WqRTEJUmZZlDpLVjWLvJLdCbE7dsbTg6cLsw zQyg== X-RZG-AUTH: ":Ln4Re0+Ic/6oZXR1YgKryK8brlshOcZlIWs+iCP5vnk6shH+AXj0Jt0kPFIgK7tToaE=" X-RZG-CLASS-ID: mo00 Received: from bruno.haible.de by smtp.strato.de (RZmta 46.1.3 DYNA|AUTH) with ESMTPSA id R06a06vBT9TsAZE (using TLSv1 with cipher ECDHE-RSA-AES256-SHA (curve X9_62_prime256v1 with 256 ECDH bits, eq. 3072 bits RSA)) (Client did not present a certificate); Sun, 29 Dec 2019 10:29:54 +0100 (CET) From: Bruno Haible To: Ben Pfaff Subject: Re: immutable string type Date: Sun, 29 Dec 2019 10:29:53 +0100 Message-ID: <6610661.GhE8slusZh@omega> User-Agent: KMail/5.1.3 (Linux/4.4.0-170-generic; KDE/5.18.0; x86_64; ; ) In-Reply-To: References: <2299371.vStytN2T3e@omega> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2a01:238:20a:202:5301::10 X-BeenThere: bug-gnulib@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Gnulib discussion list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Tim =?ISO-8859-1?Q?R=FChsen?= , bug-gnulib , Darshit Shah Errors-To: bug-gnulib-bounces+normalperson=yhbt.net@gnu.org Sender: "bug-gnulib" Ben Pfaff wrote: > This sort of thing won't work on systems with virtually indexed caches, > at least not without inserting explicit flushes. Good point. Yes, explicit data cache flushing instructions or - in the worst case - system calls are necessary. > I don't know whether > virtually indexed caches still exist in the wild. Yes, data caches are indexed by virtual address, not by physical address, on many platforms. That makes the common case of a cache lookup faster. Bruno