October 2009 - Darwin-dev - lists.apple.com

Re: TRIM in the drivers and OS for SSD?
by Chris Sarcone 27 Oct '09

27 Oct '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

1 0

unified buffer cache and mmap
by Joel Reymont 27 Oct '09

27 Oct '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:from:content-type :content-transfer-encoding:subject:date:message-id:to:mime-version :x-mailer; bh=GptsdSvg8do31y0krhvOkjGaNho/MG4XXESQTB5Z6PQ=; b=oJ5vhHJjNaaP1XvcrRtbiKUMn7hRWq/G1H7aN0eZxiHBHitr8l4FxtIC+Q7b8XYreN sjRFvkReAaIF/Rx6E3ThR9GGZcoCoHNp/3PUZph+Q86VSx2o+gFDHExd6m0ibdaKLGZg jWNjev+qY+OU1JACTmE8fxamHSLgrS+8fcctc= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:content-type:content-transfer-encoding:subject:date:message-id :to:mime-version:x-mailer; b=l/Bgvg4ZWYTd+xQUJqKi6Z48KBd3h93Yu8iav3tGHn+hvE64+T98S/aj4t0+5bDnfI Sm0mRv8nBlnh1yWW5NDR+QRLuoZuMxUyi1rxQlgF3+4WwoNy5IaslYZ3S0iWtV2Pe8CZ hFDI9pH+y9opjp1gsIGfvfCzqX1+Cbme42J0E= How does the Unified Buffer Cache (UBC) work with mmap-ed files? At what point are the pages read into the UBC, for example? Thanks, Joel --- firefox for android! http://wagerlabs.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

1 0

Re: low-level file system mechanism used by virtual memory (vminfo dtrace probe help!)
by Joel Reymont 27 Oct '09

27 Oct '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)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=C7WRFUAlLhPfXg3eHhjpMM9P6TtiSsxd8zL3GDImy9c=; b=J2kt2SMneEoJ0i5l/ydcP0XDGkBeHdmU7uowq4sQlhQogbVmtPqE9CDQI+M64IHUTu 5MF8QBTDDPz+u5CN3/YT/R/oqY5Lms41FJjSodQDv45aHVO2Cr1cgwFiIJfcAOxtwaTi BEYluEqVJwg1MnnP9lxfutiHJJ8VJUuoDjvoU= 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=u9XWwzgAn5csfeWMumSojCErf67/VPw0BKA4lnMoHiYvks8U5yvx7aaML/o4ty+01+ Tc50jIpCa1B9q09jyQ4boGru1BFhlTOaLDJkJIcMN5Yiejp9DC1GVGPkCZhjUTYWJtPh EtDrSgHQQz1M8pB5+tpHXlUzQMghv1o9i4EJE= On Oct 27, 2009, at 1:07 PM, Joel Reymont wrote: To refine the question... pages_in_upl = size / PAGE_SIZE; DTRACE_VM2(pgpgin, int, pages_in_upl, (uint64_t *), NULL); which appears to track the number of pages that have been paged in. Thanks, Joel --- firefox for android! http://wagerlabs.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… How do you use it? Is the description of each probe available somewhere? How do I figure out which argument has what value using this information from 'dtrace -lvP vminfo', for example? 19018 vminfo mach_kernel vnode_pagein pgpgin pager_return_t vnode_pagein() in xnu-1456.1.26/bsd/vm/vnode_pager.c has this bit Which probe can tell me the address of the pages that are being paged in, though? This email sent to site_archiver(a)lists.apple.com

1 0

Re: low-level file system mechanism used by virtual memory (vminfo dtrace probe help!)
by Joel Reymont 27 Oct '09

27 Oct '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)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=/mui4FsEGP5kxzFemzNBbWgRqBcwRvrLpRZk6k71sWw=; b=bjmWjuiKZwWVR17uoGYwO9k+lXHt59oGYg9D+Q/6yFVSGhzzCi3yUWYqS7GQ26vnXO XTsqpqPVHedtLSKH2N9xbGkOFh2EkbgCRLpDPtFSEcZj8AxekCugwWM3YI9bkCTJalO3 mWKgpNVrZ2Dq/dDiZqQSCNMST3SfmUV2lp4sE= 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=QBcHJ64kN4ny71X6VIjKB/l2Q+FxhJ4tdqVdAt/bwY0odGUzmGwNVKkOMjby083pPJ Lp0dQlVCgvtU8wqO32eMa8DGyjYJWTaNH4JHAWvdUiA/mwfMZGsZ6wBBj0ZlArNMBMUn trF3LqgmGWpjrKa6wX6t1Py37clYMGMrEsc3o= On Oct 26, 2009, at 11:10 PM, Terry Lambert wrote: How do you use it? Is the description of each probe available somewhere? Probe Description Attributes Identifier Names: Private Data Semantics: Private Dependency Class: Unknown Argument Attributes Identifier Names: Private Data Semantics: Private Dependency Class: ISA Argument Types None --- firefox for android! http://wagerlabs.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… SnowLeopard has the vminfo dtrace provider. How do I figure out which argument has what value using this information from 'dtrace -lvP vminfo', for example? 19018 vminfo mach_kernel vnode_pagein pgpgin This email sent to site_archiver(a)lists.apple.com

1 0

TRIM in the drivers and OS for SSD?
by lbland 27 Oct '09

27 Oct '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com hi- Now that Windows 7 has TRIM, SSDs are finally looking very attractive. Any info. on TRIM in darwin/Mac OS X drivers? thanks!- -lance _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

1 0

low-level file system mechanism used by virtual memory
by Joel Reymont 26 Oct '09

26 Oct '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:from:content-type :content-transfer-encoding:subject:date:message-id:to:mime-version :x-mailer; bh=18AjP0mGtOskLtO1sRjqs8GAHTZiUFUbnyK52QqoI3U=; b=xQL13fjDT02oZCwguxarLYbjP9esUPxQMxTg0oIrDARNr2bmLUhrpKhQQFGnStj9Oq /oM5+TvMOgSRzi6yjp19SatZMfnbUygPy+Qazy1EbIjc4Oym/5KTAjrgQxSZ0jy5W5xK rfzjnjjTt7M1uU/3u2S8MqlB1JhQvdXd3JHZ0= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:content-type:content-transfer-encoding:subject:date:message-id :to:mime-version:x-mailer; b=uMtMygKYqMKALIe+QNZmRWc+9oQiBUnnMlnD/s+5Wpga42G0yBP0OX9px3kEvco9V1 19YcZoJX0UQDWSWE2BG1JXh4yU8Lf0ukqnQyoaxt4mV9uqGzXsUaaNEY8tVhjMUzf4/z 89mlMKiU/gtdnPyq/pJaeDmNQDUCbtCZSp13c= How can I track it with DTrace? Thanks, Joel --- firefox for android! http://wagerlabs.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… What low-level file system mechanism is used by the Leopard virtual memory manager to page in chunks of mmap-ed files from disk? This email sent to site_archiver(a)lists.apple.com

1 0

Re: Editor which would set write lock on the file
by Jens Alfke 26 Oct '09

26 Oct '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Oct 26, 2009, at 6:04 AM, rohan a wrote: I am trying to backup a file by setting a shared(read) lock on it. I need to test this locking by writing to the file with an editor that would set a write-lock on it. Which editor can I use ? What exactly are you trying to do in your program? —Jens _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I can't think of any program that would do this. The usual design pattern is to read the file into memory and immediately close it. When saving, it writes a new file and then calls rename() to replace the old file atomically with the new one. Apps that use database-like files (such as CoreData based apps) would leave the file open, but probably not take out a write lock until the moment they try to save. (SQLite works this way.) If you just want to test your app, it would be trivial to write a little tool that opens a file with O_EXLOCK and then just blocks till you kill it. This email sent to site_archiver(a)lists.apple.com

1 0

Editor which would set write lock on the file
by rohan a 26 Oct '09

26 Oct '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type; bh=mKx1qvVh6osftEZxGSGyoJ/bT/S58e7rk39wg3Q9Jxw=; b=yDLT38SYfeE1JghNOzIWoWI9LcPJmvmUlAQtVEqot+n8CKDB4qKfjZJMl7E8UEzEiK RFbg1elwAJXfx5iSUT4AmdfV7cCGyzvdpLxkQeEF0TLKYGKYJnbtGAkdMQNMyEVgRZaA mF/w0zPF9x/EpDzd1MKnG6PxTFiyalep0ew2w= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=VGa+FHMM8GzVRLsBnzGsKYrznHMOT52i3dwMvuG1J9tdXk4MKe9Iy2+CckwJkL74Zb EPtIi6ht/J9pgfu4O4sSMWpZdNs+MZoflRlJtjl8zsiwH4Bo3TIQsv+0/ISSisd/hwv6 ZEI4+9TNL6roFEj5DieMFy+1nisZm82jbyxmI= Hello All, I am trying to backup a file by setting a shared(read) lock on it. I need to test this locking by writing to the file with an editor that would set a write-lock on it. Which editor can I use ? I have written a stand-alone program that tries to set a write lock on the file and this fails indicating the shared lock has been set right on the file. but I want to try this out using some editor Thanks _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

1 0

dtrace provider for page faults
by Joel Reymont 26 Oct '09

26 Oct '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:from:content-type :content-transfer-encoding:subject:date:message-id:to:mime-version :x-mailer; bh=fISLhI1sLSd1blxXxyMgxMxh8KEqprOJ0ckiTBlJuqc=; b=XlWTRcfjl6JnipQs3g8ONatfwOsux/15/I3o0LQ+caAeqswsJCRaUc6xoukCGsZ2pT cv5Po5ficDkrfZgkcQP1x9R9RpMFzSsZhcj2wo2P14+Jy2xZttsTWcfB0yYq+o5djIws q+UCKTCQrb1LujWjC9W2WzBuIJr5ikLzg+g9k= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:content-type:content-transfer-encoding:subject:date:message-id :to:mime-version:x-mailer; b=plYGhYMZmmcKZTuxWN761bwUygCn/+qv23BOiC3BV5PcSeS71dmrpS+/hV6xdv+San fnjexTtGMC4J0sydF6HLg3JFGp+kRiv+iyVQWRRCOl/HMM+5i1Exa+aFLKHntpuDQSdu moXAD2TihFBK0hCfeYMUS3naqXNlaJTfD8jmM= Thanks, Joel --- firefox for android! http://wagerlabs.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Can someone suggest a DTrace provider for tracking virtual memory pageins and pageouts in a certain memory range? The memory range would be one established by mmap and I'm tracking memory access patterns. This email sent to site_archiver(a)lists.apple.com

1 0

Re: Multiple Manitors, Keyboards, Mice
by Jens Alfke 25 Oct '09

25 Oct '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

1 0