June 2008 - Darwin-dev - lists.apple.com

Re: isalpha for UniChar
by Clark Cox 23 Jun '08

23 Jun '08

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:message-id:date:from:to :subject:cc:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=3nG5VqKkUsHMLTVDowuoRH3L10r50VzLN+yYomn1a1I=; b=MYfN7TGBthskt+Aq37LYPjHC8ajJKAK4W1dKTdCr0u92uZLL4x8Bp1jLr1EjknDEIM c46BDP5GEt6wiCcnRaMMsdSCWzVrmV8sTsudDcUdzochO2IwKQa0IHZ2pD2dZladYu2C 1KoomJQbq/wt1hXC7yLhVFDAIUgbMWH27B8e0= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=rlKwfvM4ERNE/dKBiVP5h8ekWk4H5hEN8pDODa7phWa/G8wIFarGY1ExL/Nhmcb/px pZQLh4UkDfuXVAH3uHTo420D4QUfJ5sx/7OnfmGzI7fOgyZOnc0NTGhIpUmbp0vltGpI BLRLnMe9aA1cWmw+BcMus1Qe9UjzPS7HsJW2o= On Sun, Jun 22, 2008 at 8:23 PM, Dmitry Markman <dmarkman(a)mac.com> wrote: > Hi > are there functions for UniChar similar to > isdigit is alpha e.t.c. > > > so basically I'd like to do something like > > if(isalpha(unichar)) { > .... > } No, you really don't want to do that. Dealing with individual codepoints in Unicode is almost always the wrong thing to do. You typically want to deal with strings. What is it that you're actually trying to accomplish? -- Clark S. Cox III clarkcox3(a)gmail.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

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Re: isalpha for UniChar
by Dmitry Markman 23 Jun '08

23 Jun '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com I think I found the way: CFCharacterSetIsCharacterMember (CFCharacterSetGetPredefined(kCFCharacterSetAlphaNumeric), uniChar) thanks On Jun 22, 2008, at 11:23 PM, Dmitry Markman wrote: Hi are there functions for UniChar similar to isdigit is alpha e.t.c. so basically I'd like to do something like if(isalpha(unichar)) { .... } thanks Note: I didn't find anything in CoreFoundation or Unicode utilities api Dmitry Markman _______________________________________________ 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/dmarkman%40mac.com Dmitry Markman _______________________________________________ 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 dmarkman(a)mac.com This email sent to site_archiver(a)lists.apple.com

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isalpha for UniChar
by Dmitry Markman 23 Jun '08

23 Jun '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi are there functions for UniChar similar to isdigit is alpha e.t.c. so basically I'd like to do something like if(isalpha(unichar)) { .... } thanks Note: I didn't find anything in CoreFoundation or Unicode utilities api Dmitry Markman _______________________________________________ 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

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Re: cpu frequencies
by Michael Smith 21 Jun '08

21 Jun '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jun 21, 2008, at 7:06 AM, Jean-luc Chasseriau wrote: Thanks all for these information! I would like to quickly give some feedbacks from your help. That is correct. These values are maxima. No. = Mike _______________________________________________ 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… 1) sysctl doesn't seem to provide the _current_ cpu frequency since *cpu* values don't change while time is passing by. 3.c) why retrieving this value? The main goal is quite stupide but the background (how to) is still interesting to know. I would like to make a simple widget which is displaying cpus frequencies on the menu bar. (I saw that on linux + gnome, very useless I agree, but fun! :)) Not only useless, but inaccurate. You might as well generate random numbers and display them. That is one of the reasons the information is not made available; see below. Michael, could you give me an entry point to help me where can I start to look to gather this? The Darwin kernel uses core P-states very aggressively on many platforms. The very act of running code to examine the current P- state and draw something based on that value will change it. It is not uncommon to see over 100 P-state transitions per second on a given core. Likewise, C-state transitions are very common (tens to hundreds per second, depending on workload). The details of the code that manages these states (not the policy) can be found in the published Darwin sources, but all this will tell you is that the system is P/C-state agile on a core by core basis, and that these states are intimately tied to the work state of individual cores. There is no user-relevant concept of "current P/C state" for a given core. This email sent to site_archiver(a)lists.apple.com

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Re: cpu frequencies
by Michael Smith 21 Jun '08

21 Jun '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jun 20, 2008, at 12:02 PM, darwin-dev-request(a)lists.apple.com wrote: This information is not available to applications. = Mike _______________________________________________ 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 would like to retrieve the current cpu frequency of each cpu/core installed (this frequency can change depending on the use -thanks to the intel speedstep technology-). Currently I'm using the asm instruction "rdtsc" (which retrieve the number of tick elapsed since the cpu started) then using a timer to calculate the frequency. This is working fine, but this is not reliable for multi-cpu/core architecture. It is not reliable in any fashion, even on a single-core system. On some systems the TSC will stop when a core or package enters the deeper C states, for example. On many mobile systems, the core clock frequency changes very frequently and can spend a proportionately large amount of time well below the device's maximum. What are you trying to do, and why do you think that knowing the "current" core clock frequency will help you? This email sent to site_archiver(a)lists.apple.com

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Re: cpu frequencies
by Ryan McGann 21 Jun '08

21 Jun '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Ryan rmcgann(a)mac.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… I would like to retrieve the current cpu frequency of each cpu/core installed (this frequency can change depending on the use -thanks to the intel speedstep technology-). Does anyone know which system call should be use to do so? I believe everybody so far has misread your question. As I read it, you want to know the CPU frequency of EACH core, and as you rightly state, individual cores can be throttled and/or shut down on newer Intels. sysctl only gives you information for *A* core, not all cores. Whether or not Mac OS X takes advantage of this feature of SpeedStep, I am not sure. I believe you might have to step into the Mach interfaces for host info; start researching <mach/host_info.h>. I've used host_info only sparingly, so I'll let somebody iwth more experience tell you if you those interfaces can give you the information you need and how to use them. Also, somebody from Apple will (rightly) discourage you, as these interfaces are "SPI" and not API--as I like to say "somewhat private interfaces" that might change in the future. This email sent to site_archiver(a)lists.apple.com

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Re: cpu frequencies
by Jean-Daniel Dupas 20 Jun '08

20 Jun '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Le 20 juin 08 à 09:56, Jean-luc Chasseriau a écrit : Hi! Do you have an idea of how to solve this problem? Thanks to all! jeanluc man 3 sysctl. _______________________________________________ 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 I'm please to be a new member of darwin-dev so here is the first question :) I would like to retrieve the current cpu frequency of each cpu/core installed (this frequency can change depending on the use -thanks to the intel speedstep technology-). Does anyone know which system call should be use to do so? Currently I'm using the asm instruction "rdtsc" (which retrieve the number of tick elapsed since the cpu started) then using a timer to calculate the frequency. This is working fine, but this is not reliable for multi-cpu/core architecture. Have a look at sysctl. This function can tell you a lot about your OS and your machine. You can also type "sysctl -a" in your terminal to get a preview of which info you can retreive using this function. smime.p7s

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Re: cpu frequencies
by Steve Checkoway 20 Jun '08

20 Jun '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jun 20, 2008, at 12:56 AM, Jean-luc Chasseriau wrote: Welcome. sysctl maybe? $ sysctl -a|grep frequency kern.exec: unknown type returned hw.busfrequency = 1000000000 hw.cpufrequency = 2000000000 hw.tbfrequency = 33332472 hw.tbfrequency: 33332472 hw.cpufrequency_max: 2000000000 hw.cpufrequency_min: 2000000000 hw.cpufrequency: 2000000000 hw.busfrequency_max: 1000000000 hw.busfrequency_min: 1000000000 hw.busfrequency: 1000000000 Perhaps: uint32_t freq; size_t size = sizeof(freq); sysctlbyname( "hw.cpufrequency", &freq, &size, NULL, NULL ); -- Steve Checkoway "Anyone who says that the solution is to educate the users hasn't ever met an actual user." -- Bruce Schneier _______________________________________________ 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 I'm please to be a new member of darwin-dev so here is the first question :) I would like to retrieve the current cpu frequency of each cpu/core installed (this frequency can change depending on the use -thanks to the intel speedstep technology-). Does anyone know which system call should be use to do so? smime.p7s

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cpu frequencies
by Jean-luc Chasseriau 20 Jun '08

20 Jun '08

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Re: Mac OS X 10.5.3 Sources Posted
by William Siegrist 20 Jun '08

20 Jun '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jun 19, 2008, at 9:31 PM, Eli Bach wrote: On Jun 19, 2008, at 9:20 PM, Stephen J. Butler wrote: -Bill _______________________________________________ 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 On Thu, Jun 19, 2008 at 11:16 PM, Eli Bach <ebach2(a)gmail.com> wrote: Um, isn't "CF-476.13" CFLite? And it's on the list. Try to download or browse it and you get an error. Sorry about that. It just so happened that I had gone to <http://www.opensource.apple.com/darwinsource/Current/ > and downloaded CF from there, which turns out to be the 10.5.2 source. I also get a 'sources not available' error trying to download the tar.gz file. I forgot to update the Current link to 10.5.3. Its been corrected. And per my other email, CF-Lite always takes extra time and is not posted yet. I'll announce it separately. smime.p7s

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