Thanks Andrew, will try with “GetPerformanceCounter” and see how this works out. The test bed at present is x86
Sai From: Andrew Fish [mailto:[email protected]] Sent: Wednesday, June 03, 2015 9:28 PM To: [email protected] Subject: Re: [edk2] getsystemtime-- help On Jun 3, 2015, at 9:22 PM, Saiprasad Chavali <[email protected]<mailto:[email protected]>> 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 Which a lot of times is built on: 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:[email protected]] Sent: Wednesday, June 03, 2015 7:51 PM To: [email protected]<mailto:[email protected]> Subject: Re: [edk2] getsystemtime-- help On Jun 3, 2015, at 7:47 PM, Saiprasad Chavali <[email protected]<mailto:[email protected]>> 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:[email protected]] Sent: Wednesday, June 03, 2015 7:40 PM To: [email protected]<mailto:[email protected]> Subject: Re: [edk2] getsystemtime-- help On Jun 3, 2015, at 7:27 PM, Saiprasad Chavali <[email protected]<mailto:[email protected]>> 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 [email protected]<mailto:[email protected]> https://lists.sourceforge.net/lists/listinfo/edk2-devel ------------------------------------------------------------------------------ _______________________________________________ edk2-devel mailing list [email protected]<mailto:[email protected]> https://lists.sourceforge.net/lists/listinfo/edk2-devel ------------------------------------------------------------------------------ _______________________________________________ edk2-devel mailing list [email protected]<mailto:[email protected]> https://lists.sourceforge.net/lists/listinfo/edk2-devel
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