March 2004 - Darwin-kernel - lists.apple.com

Re: IOPMScheduleEvent...
by Ethan Bold 18 Mar '04

18 Mar '04

Yep, you're using this correctly, but one limitation of this API is that it won't accept wakeup times less than 90 seconds from "right now." Try doing now+90 seconds, and you should see it work. We may relax this cutoff in the future... -ethan On Mar 18, 2004, at 5:51 AM, Jerry LeVan wrote: Hello, This is a bit off-topic but I can't locate any info on using the IOPMSccheduleEvent call. I basically want to try to wake a sleeping mac a bit before cron is supposed to fire. Here is a program that does *not* work. ******************************************************************** #import <Foundation/Foundation.h> #import <IOKit/pwr_mgt/IOPMLib.h> int main (int argc, const char * argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; int res; NSDate *now = [NSDate date]; NSDate *plus30Sec = [NSDate dateWithTimeIntervalSinceNow:30]; NSLog(@"\nnow: %@ \nlater: %@", now, plus30Sec); res = IOPMSchedulePowerEvent ((CFDateRef)plus30Sec,NULL, CFSTR(kIOPMAutoWake)); NSLog(@"res=%x",res); [pool release]; return 0; } ******************************************************************* Here is the output 2004-03-18 08:48:22.828 DateStuff[2507] now: <CFDate 0x300da0 [0xa01900e0]>{time = 101310503} later: <CFDate 0x302ef0 [0xa01900e0]>{time = 101310533} 2004-03-18 08:48:22.829 DateStuff[2507] res=e00002d8 DateStuff has exited with status 0. The error code is "not ready" ( Program was run as root ). The error code is the same for all choices of the operation. Is the IOPMScheduleEvent usable from outside the kernel? Thanks for any insight... Jerry _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored. _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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IOPMScheduleEvent...
by Jerry LeVan 18 Mar '04

18 Mar '04

Hello, This is a bit off-topic but I can't locate any info on using the IOPMSccheduleEvent call. I basically want to try to wake a sleeping mac a bit before cron is supposed to fire. Here is a program that does *not* work. ******************************************************************** #import <Foundation/Foundation.h> #import <IOKit/pwr_mgt/IOPMLib.h> int main (int argc, const char * argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; int res; NSDate *now = [NSDate date]; NSDate *plus30Sec = [NSDate dateWithTimeIntervalSinceNow:30]; NSLog(@"\nnow: %@ \nlater: %@", now, plus30Sec); res = IOPMSchedulePowerEvent ((CFDateRef)plus30Sec,NULL, CFSTR(kIOPMAutoWake)); NSLog(@"res=%x",res); [pool release]; return 0; } ******************************************************************* Here is the output 2004-03-18 08:48:22.828 DateStuff[2507] now: <CFDate 0x300da0 [0xa01900e0]>{time = 101310503} later: <CFDate 0x302ef0 [0xa01900e0]>{time = 101310533} 2004-03-18 08:48:22.829 DateStuff[2507] res=e00002d8 DateStuff has exited with status 0. The error code is "not ready" ( Program was run as root ). The error code is the same for all choices of the operation. Is the IOPMScheduleEvent usable from outside the kernel? Thanks for any insight... Jerry _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Socket KEXT/Daemon communication Freezing
by Matt Jaffa 16 Mar '04

16 Mar '04

Hi, I was wondering if anyone here is very familiar with Socket KEXT/Dameon communication? The problem is that when I put my computer to sleep and wakeup my KEXT/Daemon communication goes all haywire. Somehow the communication gets disrupted. Is there something I am missing in my code to prevent a situation like this? Thanks, Matt _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Funnel Funnel Funnel
by Jim Magee 15 Mar '04

15 Mar '04

Not every system call takes a funnel by default. As was said before by Justin, none of the Mach or IOKit system calls take one. But also, some BSD system calls don't take them either. And, even for those that do, when the thread is blocked in the system call it drops the funnel so that another thread can use it (the code in the system call must be able to deal with the state of things changing each time it [potentially] blocks). --Ji On Mar 12, 2004, at 11:41 PM, Ramble Leon wrote: > Thanks, does it mean any syscall will hold a funnel > when it enter kernel? If no thread_funnel_switch > inside, a syscall cannot be called by two or more > threads running on differenct processors at same time, > is it right? > > --- Quinn <eskimo1(a)apple.com> wrote: >> At 2:04 -0800 12/3/04, Ramble Leon wrote: >>> Hi, I'm confused by funnel in darwin, I was >> reading >>> some source code of nfs, there is no >> thread_funnel_set >>> can be found in some vfs syscall, but there are >> many >>> thread_funnel_switch inside nfs implement, when did >>> the system call get the kernel_funnel? >> >> Funnels are acquired as part of system call entry. >> Check out the >> sy_funnel field of the sysent structure. >> >> S+E >> -- >> Quinn "The Eskimo!" >> <http://www.apple.com/developer/> >> Apple Developer Technical Support * Networking, >> Communications, Hardware >> _______________________________________________ >> darwin-kernel mailing list | >> darwin-kernel(a)lists.apple.com >> Help/Unsubscribe/Archives: >> > http://www.lists.apple.com/mailman/listinfo/darwin-kernel >> Do not post admin requests to the list. They will be >> ignored. >> > > > __________________________________ > Do you Yahoo!? > Yahoo! Mail - More reliable, more storage, less spam > http://mail.yahoo.com > _______________________________________________ > darwin-kernel mailing list | darwin-kernel(a)lists.apple.com > Help/Unsubscribe/Archives: > http://www.lists.apple.com/mailman/listinfo/darwin-kernel > Do not post admin requests to the list. They will be ignored. [demime 0.98b removed an attachment of type application/pkcs7-signature which had a name of smime.p7s] _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: LOCAL_PEERCRED and getpeereid
by Quinn 15 Mar '04

15 Mar '04

At 0:02 +0900 6/3/04, Etsushi Kato wrote: P.S. Is it the proper list for sending patches? No. You can get patches in Darwin in two different ways. 1. OpenDarwin -- Look at the information on <http://www.opendarwin.org>. 2. Apple Bug Report -- If you file a bug against Mac OS X, you can include your code along with the report. One of our engineers will then look at your bug report and potentially fix the bug using your code. <http://developer.apple.com/bugreporter/> S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Technical Support * Networking, Communications, Hardware _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Funnel Funnel Funnel
by Justin Walker 13 Mar '04

13 Mar '04

On Friday, March 12, 2004, at 08:41 PM, Ramble Leon wrote: Thanks, does it mean any syscall will hold a funnel when it enter kernel? If no thread_funnel_switch inside, a syscall cannot be called by two or more threads running on differenct processors at same time, is it right? System calls will take a funnel when entering the kernel. That is required. You are correct that holding a funnel on one processor will inhibit a thread from taking that funnel on a different processor. If there were just one funnel, this would mean that only one process at a time could be actively executing in the kernel. However: - there are two funnels, one for network operations, and one for other "BSD" kernel operations; and - the funnels only affect the BSD component of the kernel; IOKit and Mach have other synchronisation mechanisms that are "finer-grained" The 'funnel' scheme is designed as an interim step in making the Darwin kernel "MP-efficient". Since the BSD underpinnings were not MP-safe, much less efficient, we needed something akin to a Giant Lock to assure that MP operations would be safe. The two-funnel scheme is a pretty effective compromise that got things running, and avoided a long dark period while we (now, they :-}) developed a higher-performance implementation. Hope that helps. Regards, Justin --- Quinn <eskimo1(a)apple.com> wrote: At 2:04 -0800 12/3/04, Ramble Leon wrote: Hi, I'm confused by funnel in darwin, I was reading some source code of nfs, there is no thread_funnel_set can be found in some vfs syscall, but there are many thread_funnel_switch inside nfs implement, when did the system call get the kernel_funnel? Funnels are acquired as part of system call entry. Check out the sy_funnel field of the sysent structure. S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Technical Support * Networking, Communications, Hardware _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored. __________________________________ Do you Yahoo!? Yahoo! Mail - More reliable, more storage, less spam http://mail.yahoo.com _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored. _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Funnel Funnel Funnel
by Ramble Leon 13 Mar '04

13 Mar '04

Thanks, does it mean any syscall will hold a funnel when it enter kernel? If no thread_funnel_switch inside, a syscall cannot be called by two or more threads running on differenct processors at same time, is it right? --- Quinn <eskimo1(a)apple.com> wrote: > At 2:04 -0800 12/3/04, Ramble Leon wrote: > >Hi, I'm confused by funnel in darwin, I was > reading > >some source code of nfs, there is no > thread_funnel_set > >can be found in some vfs syscall, but there are > many > >thread_funnel_switch inside nfs implement, when did > >the system call get the kernel_funnel? > > Funnels are acquired as part of system call entry. > Check out the > sy_funnel field of the sysent structure. > > S+E > -- > Quinn "The Eskimo!" > <http://www.apple.com/developer/> > Apple Developer Technical Support * Networking, > Communications, Hardware > _______________________________________________ > darwin-kernel mailing list | > darwin-kernel(a)lists.apple.com > Help/Unsubscribe/Archives: > http://www.lists.apple.com/mailman/listinfo/darwin-kernel > Do not post admin requests to the list. They will be > ignored. > __________________________________ Do you Yahoo!? Yahoo! Mail - More reliable, more storage, less spam http://mail.yahoo.com _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: (no subject)
by Adrian Bool 12 Mar '04

12 Mar '04

Hi Sanjay I think sysctl is the command you want to use to set this stuff - see it's man page for more info. If you look in /etc/rc you will see, if [ -f /etc/sysctl-macosxserver.conf ]; then awk '{ if (!index($1, "#") && index($1, "=")) print $1 }' < /etc/sysctl-macosxserver.conf | while read do sysctl -w ${REPLY} done fi if [ -f /etc/sysctl.conf ]; then awk '{ if (!index($1, "#") && index($1, "=")) print $1 }' < /etc/sysctl.conf | while read do sysctl -w ${REPLY} done fi It seems that if you add, kern.maxprox=<my number> To either /etc/sysctl.conf or /etc/sysctl-macosxserver.conf then you will get the effect you want. I think that using sysctl.conf may be the best of the two as I can imagine Apple using the latter for their purposes on MacOSX Server... Hope it works! ;-) aid On 12 Mar 2004, at 15:53, Sanjay Mishra wrote: Where to override the maxproc and other settings for limit so that it is available to everybody across the reboot and my application can use it ? I tried to edit the rc.common in the etc directory for both bash and tcsh ie I set for both limit and ulimit. Despite this change in the maxproc and descriptors are not available. Am I doing changes the wrong way? I am running on Mac OS 10.3. Regards, Sanjay Mishra _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored. _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Funnel Funnel Funnel
by Quinn 12 Mar '04

12 Mar '04

At 2:04 -0800 12/3/04, Ramble Leon wrote: Hi, I'm confused by funnel in darwin, I was reading some source code of nfs, there is no thread_funnel_set can be found in some vfs syscall, but there are many thread_funnel_switch inside nfs implement, when did the system call get the kernel_funnel? Funnels are acquired as part of system call entry. Check out the sy_funnel field of the sysent structure. S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Technical Support * Networking, Communications, Hardware _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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(no subject)
by Sanjay Mishra 12 Mar '04

12 Mar '04

Where to override the maxproc and other settings for limit so that it is available to everybody across the reboot and my application can use it ? I tried to edit the rc.common in the etc directory for both bash and tcsh ie I set for both limit and ulimit. Despite this change in the maxproc and descriptors are not available. Am I doing changes the wrong way? I am running on Mac OS 10.3. Regards, Sanjay Mishra _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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