X-Recipient: archive-cygwin AT delorie DOT com DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:to:from:subject:date:message-id:references :mime-version:content-type:content-transfer-encoding; q=dns; s= default; b=HUGzePr3S56ydUK+OuAyZgDZGH5Oz76LHX62aRb1ntUNywvlbeO9N I6GUjsQYg9/NYxApJ79x4U/sMtbt8EFdm1nSXNuPnfC0BEHMngg6Iq8MHCMSFLzs gQ/PMsZEMEs2ek8VWp23X/kzo5BjGh02TZpf8w7iUAHFf6sgP0Ml6c= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:to:from:subject:date:message-id:references :mime-version:content-type:content-transfer-encoding; s=default; bh=UfXRecpv5dBOVR/JSymuQdBBtns=; b=RyzI3zS7aZulShRv9awri6FiiI12 xVM4XwCeXzGmDb3NLYk4IbzPCjstHkZwz/UBGrhlV1+tMBJ18Xr/qAt4oR9BLI1V LI8EhUyhm3cCcaGIuudY3EUeDVlYzqYwRNJ0fYmEqdyp/syHvX3M5R6jAZW63qbz qwOHq5DC7YwK1Fs= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=2.1 required=5.0 tests=AWL,BAYES_50,FSL_HELO_BARE_IP_2,RCVD_IN_DNSWL_LOW,RCVD_NUMERIC_HELO,RP_MATCHES_RCVD,SPF_HELO_PASS,SPF_PASS autolearn=no version=3.3.2 spammy=1.4, prudent, 9.7, opens X-HELO: plane.gmane.org To: cygwin AT cygwin DOT com From: Achim Gratz Subject: Re: Performance of "ls -F" Date: Mon, 25 Jan 2016 11:02:42 +0000 (UTC) Lines: 51 Message-ID: References:

<3a9ff6ec2d5e4e64a96a8f8e31d12f22 AT ntmaexbe04 DOT bedford DOT progress DOT com> <20160122201418 DOT GC3268 AT calimero DOT vinschen DOT de> <8737tpqqb6 DOT fsf AT Rainer DOT invalid> <20160123173552 DOT GE3268 AT calimero DOT vinschen DOT de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit User-Agent: Loom/3.14 (http://gmane.org/) X-IsSubscribed: yes Corinna Vinschen cygwin.com> writes: > In the noacl case, Cygwin tries to find out if files are scripts. It > opens the file and checks the first two bytes in the file for a shebang > (and other stuff). acl > time ls --file-type > /dev/null 0.015u 0.015s 0:00.42 4.7% 0+0k 0+0io 2473pf+0w acl > time ls -F > /dev/null 0.078u 0.858s 1:10.69 1.3% 0+0k 0+0io 5243pf+0w noacl > time ls --file-type > /dev/null 0.015u 0.015s 0:00.37 5.4% 0+0k 0+0io 2391pf+0w noacl > time ls -F > /dev/null 0.093u 1.327s 1:38.90 1.4% 0+0k 0+0io 6309pf+0w > This may take a lot of time, more so on network > drives. Can you try adding the "notexec" mount option to the "noacl" > share and see if that helps? acl,notexec > time ls --file-type > /dev/null 0.015u 0.030s 0:00.41 9.7% 0+0k 0+0io 2471pf+0w acl,noexec > time ls -F > /dev/null 0.062u 0.811s 1:10.31 1.2% 0+0k 0+0io 5240pf+0w noacl,notexec > time ls --file-type > /dev/null 0.031u 0.030s 0:00.41 14.6% 0+0k 0+0io 2389pf+0w noacl,notexec > time ls -F > /dev/null 0.046u 0.718s 0:56.23 1.3% 0+0k 0+0io 4994pf+0w > This test is done for a looong time to accommodate FAT filesystems in > the first place. It might be prudent to disable it by default these > days... Looks like that's not the main reason for the extra time spent. Here's another NetApp share, but this time there are about half as many files with only two of them in each sub-directory. (1046)/mnt/upload/install > time ls --file-type x86*/patches/*/* > /dev/null 0.155u 1.358s 0:09.42 15.9% 0+0k 0+0io 10555pf+0w (1047)/mnt/upload/install > time ls -F x86*/patches/*/* > /dev/null 0.109u 1.046s 0:08.20 13.9% 0+0k 0+0io 9817pf+0w Somehow that takes a lot less time and there's no difference between the two invocations (or actually a bit less time for -F). The getVolInfo helper sees these two shares with the same settings. Not sure what to make of that... Regards, Achim. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple