site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:subject:mime-version :content-type:from:in-reply-to:date:cc:content-transfer-encoding :message-id:references:to:x-mailer; bh=yRHbmj9Ya0sfmXiDGj5R3T4pgwmdDSs92Vg66paiDa4=; b=U3UMNq2m7Xkzlg5mmuVSVs7S9Bo7LIZicprtqESJI5hyu66q97EOp0hQJK/5rSkzW9 +nbkH90IpYF0OnctdWECV9C6eDiL1ioo1W9/81c5D4ZQn81PLo9Ziqw8EoJiA3ezjv9s JJpUGplGJThq9GK94W41dyLYZO94m9o5ya3C8= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=subject:mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to:x-mailer; b=RDoSxiuDJzoTsyR/WzisxToNK1IcfRrsSZ+VGzJCW4tknkGLLNYvb3UZV5gQqtAoFO dsECA2sS0JfO9JDmsISbo+Wm0JRnUBCP+gvBmdqFRIzmfVv1jl0b8aX/dT0SwU6Sq7J8 +n7CzM0z+CJCw0cENpowVd+eL+O+HUJWxpick= On Nov 9, 2009, at 4:55 AM, Eric Gouriou wrote: Once I see a different stack trace, e.g I know that initialization code in the libraries is being run. Here's iteration #1 (73 pages) __LINKEDIT, __symtab = 2 pages, 5016 pages in __LINKEDIT, __symtab = 2 pages, 5018 pages in __DATA, __const = 4 pages, 4850 pages in __DATA, __const = 4 pages, 4854 pages in __DATA, __const = 4 pages, 4858 pages in __DATA, __const = 4 pages, 4862 pages in __DATA, __const = 4 pages, 4866 pages in __DATA, __const = 6 pages, 4956 pages in __DATA, __const = 6 pages, 4962 pages in __DATA, __const = 6 pages, 4968 pages in __DATA, __const = 6 pages, 4974 pages in __DATA, __const = 6 pages, 4980 pages in __DATA, __objc_classrefs = 6 pages, 4986 pages in __DATA, __data = 6 pages, 4992 pages in __DATA, __data = 7 pages, 4998 pages in iteration #2 (84 pages) __LINKEDIT, __symtab = 2 pages, 5018 pages in __DATA, __const = 6 pages, 4962 pages in __DATA, __const = 6 pages, 4968 pages in __DATA, __const = 6 pages, 4974 pages in __DATA, __const = 6 pages, 4980 pages in __DATA, __objc_classrefs = 6 pages, 4986 pages in __DATA, __data = 6 pages, 4992 pages in __DATA, __data = 7 pages, 4998 pages in __DATA, __data = 7 pages, 5005 pages in __LINKEDIT, __symtab = 1 pages, 5024 pages in __LINKEDIT, __symtab = 2 pages, 5025 pages in __LINKEDIT, __symtab = 4 pages, 5027 pages in __LINKEDIT, __symtab = 25 pages, 5031 pages in and iteration #3 (54 pages) __LINKEDIT, __symtab = 2 pages, 5016 pages in __LINKEDIT, __symtab = 2 pages, 5018 pages in __DATA, __const = 4 pages, 4850 pages in __DATA, __const = 4 pages, 4854 pages in __DATA, __const = 4 pages, 4858 pages in __DATA, __const = 4 pages, 4862 pages in __DATA, __const = 4 pages, 4866 pages in __DATA, __const = 4 pages, 4870 pages in __DATA, __const = 4 pages, 4874 pages in __DATA, __const = 4 pages, 4878 pages in __DATA, __const = 4 pages, 4882 pages in __DATA, __const = 4 pages, 4886 pages in __DATA, __const = 5 pages, 4916 pages in __DATA, __const = 5 pages, 4951 pages in --- firefox for android! http://wagerlabs.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... Is Firefox/Minefield still single-threaded by the time your measurements are captured ? If not this could also lead to run-to-run variations. I'm only looking at the differences in the dyld stage, usually the first 13-20 page-ins. Do you see that order being stable across all runs ? Not really. I'll investigate the Firefox code but I would also like to figure out the variations in the dyld portion of the page-ins, before library initializers run. Following are 3 complete samples of dyld-related page-ins. I determined that these are the product of pre-initialization dyld work by looking at the user-space stack trace, e.g. this is before initializers dyld`ImageLoaderMachOCompressed::rebase (ImageLoader::LinkContext const&)+0x63 dyld`ImageLoader::recursiveRebase (ImageLoader::LinkContext const&)+0x67 dyld`ImageLoader::recursiveRebase (ImageLoader::LinkContext const&)+0x45 dyld`ImageLoader::link(ImageLoader::LinkContext const&, bool, bool, ImageLoader::RPathChain const&)+0x89 dyld`dyld::link(ImageLoader*, bool, ImageLoader::RPathChain const&)+0x76 dyld`dyld::_main(macho_header const*, unsigned long, int, char const**, char const**, char const**)+0xb06 dyld`dyldbootstrap::start(macho_header const*, int, char const**, long)+0x31f dyld`_dyld_start+0x2a firefox-bin`0x100000000 libobjc.A.dylib`_mapStrHash+0xb libobjc.A.dylib`NXMapGet+0x2f libobjc.A.dylib`addNamedClass+0x26 libobjc.A.dylib`_read_images+0x247 libobjc.A.dylib`map_images_nolock+0x4f2 libobjc.A.dylib`map_images+0x72 dyld`dyld::notifyBatchPartial(dyld_image_states, bool, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*))+0x2fb dyld`dyld::registerImageStateBatchChangeHandler (dyld_image_states, char const* (*)(dyld_image_states, unsigned int, dyld_image_info const*))+0x1ba libSystem.B.dylib`dyld_register_image_state_change_handler+0x58 libobjc.A.dylib`_objc_init+0x3a dyld`ImageLoaderMachO::doModInitFunctions (ImageLoader::LinkContext const&)+0xe4 dyld`ImageLoader::recursiveInitialization (ImageLoader::LinkContext const&, unsigned int)+0xec dyld`ImageLoader::recursiveInitialization (ImageLoader::LinkContext const&, unsigned int)+0x9d dyld`ImageLoader::recursiveInitialization (ImageLoader::LinkContext const&, unsigned int)+0x9d dyld`ImageLoader::recursiveInitialization (ImageLoader::LinkContext const&, unsigned int)+0x9d dyld`ImageLoader::recursiveInitialization (ImageLoader::LinkContext const&, unsigned int)+0x9d dyld`ImageLoader::recursiveInitialization (ImageLoader::LinkContext const&, unsigned int)+0x9d dyld`ImageLoader::recursiveInitialization (ImageLoader::LinkContext const&, unsigned int)+0x9d dyld`ImageLoader::recursiveInitialization (ImageLoader::LinkContext const&, unsigned int)+0x9d dyld`ImageLoader::runInitializers (ImageLoader::LinkContext const&)+0x3a I would expect dyld to always be doing the same thing with the same library but either this is not the case or the kernel is reacting completely different each time. 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