> On Jun 3, 2015, at 9:22 PM, Saiprasad Chavali <s...@marvell.com> wrote: > > Hi Andrew, > > Trying to measure the elapsed time interval with a call to system time at > different levels. >
If you are writing platform code, or you know the platform. https://svn.code.sf.net/p/edk2/code/trunk/edk2/MdePkg/Include/Library/PerformanceLib.h <https://svn.code.sf.net/p/edk2/code/trunk/edk2/MdePkg/Include/Library/PerformanceLib.h> Which a lot of times is built on: https://svn.code.sf.net/p/edk2/code/trunk/edk2/MdePkg/Include/Library/TimerLib.h <https://svn.code.sf.net/p/edk2/code/trunk/edk2/MdePkg/Include/Library/TimerLib.h> On a PC the PerformanceCounter is usually the TSC (CPU register) or the ACPI Timer. Thanks, Andrew Fish > Thanks > Sai > > From: Andrew Fish [mailto:af...@apple.com] > Sent: Wednesday, June 03, 2015 7:51 PM > To: edk2-devel@lists.sourceforge.net > Subject: Re: [edk2] getsystemtime-- help > > > On Jun 3, 2015, at 7:47 PM, Saiprasad Chavali <s...@marvell.com > <mailto:s...@marvell.com>> wrote: > > Hi Andrew, > > Thanks for the comment, is there way we can ping the RTC with the help of > architecture protocol, at higher TPL’s than Callback (or) nothing? > > > The rules are the rules. > > What are you trying to do? > > Thanks, > > Andrew Fish > > > Sai > > From: Andrew Fish [mailto:af...@apple.com <mailto:af...@apple.com>] > Sent: Wednesday, June 03, 2015 7:40 PM > To: edk2-devel@lists.sourceforge.net <mailto:edk2-devel@lists.sourceforge.net> > Subject: Re: [edk2] getsystemtime-- help > > > On Jun 3, 2015, at 7:27 PM, Saiprasad Chavali <s...@marvell.com > <mailto:s...@marvell.com>> wrote: > > HI, > > Is there a better way to obtain the system time? I tried GetTime and the call > hangs When I raise the TPL level. > > > Did you violate the TPL rules in the UEFI spec? > > UEFI 2.5 section 6.1Table 23. TPL Restrictions > Time Services <= TPL_CALLBACK > > If not it is a bug in the implementation of gRT->GetTime(). > > Thanks, > > Andrew Fish > > > > Thanks > Sai > ------------------------------------------------------------------------------ > _______________________________________________ > edk2-devel mailing list > edk2-devel@lists.sourceforge.net <mailto:edk2-devel@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/edk2-devel > <https://lists.sourceforge.net/lists/listinfo/edk2-devel> > > ------------------------------------------------------------------------------ > _______________________________________________ > edk2-devel mailing list > edk2-devel@lists.sourceforge.net <mailto:edk2-devel@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/edk2-devel > <https://lists.sourceforge.net/lists/listinfo/edk2-devel> > > ------------------------------------------------------------------------------ > _______________________________________________ > edk2-devel mailing list > edk2-devel@lists.sourceforge.net <mailto:edk2-devel@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/edk2-devel > <https://lists.sourceforge.net/lists/listinfo/edk2-devel>
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