Fantastic info Liming ! Thanks ! Sent from Shubha Ramani's iPhone 6s Plus
> On Jun 7, 2016, at 7:30 PM, Gao, Liming <liming....@intel.com> wrote: > > Hi, > FreePages() will trig DEBUG_CLEAR_MEMORY() macro to zero memory. This macro > will only be called when BIT3 is configured in PcdDebugPropertyMask value. > Normally, Debug Build will configure PcdDebugPropertyMask to 0x2F so that > this macro is enabled. You can build system BIOS with PCD value 0x27 to > disable it. Then, try running your application. > > Thanks > Liming >> -----Original Message----- >> From: edk2-devel [mailto:edk2-devel-boun...@lists.01.org] On Behalf Of >> Michael Zimmermann >> Sent: Wednesday, June 08, 2016 1:35 AM >> To: Shubha Ramani <shubharam...@yahoo.com> >> Cc: edk2-devel@lists.01.org >> Subject: Re: [edk2] Why does gBS->FreePages() take so long ? >> >> which system are you testing this one? >> DEBUG builds of UEFI can be very slow because they do many checks and >> clear >> the memory on each alloc/free. >> >> Thanks >> Michael >> >> On Tue, Jun 7, 2016 at 6:36 PM, Shubha Ramani <shubharam...@yahoo.com> >> wrote: >> >>> I'm building an edk2 application which kicks off during system boot. For >>> this application I have to allocate huge slabs of memory repeatedly (96 >>> times ) - an examplewould be 1087570 pages, allocated 96 times. I'm finding >>> that it takes on the order of minutes to do gBS->FreePages() 96 times for >>> my application ! >>> Here is how I allocate each time: Status = >>> gBS->AllocatePages(AllocateAnyPages, EfiBootServicesData, >>> mNum4kPagesPerCore, >> (EFI_PHYSICAL_ADDRESS*)(MemToStressStartAddr)); >>> >>> For deallocation I use gBS->FreePages(). >>> Is there a workaround for this ? >>> Spending 3-4 minutes in the exit routine deallocating memory is not >>> acceptible ! >>> Thanks, >>> Shubha Shubha D. ramanishubharam...@gmail.com >>> shubharam...@yahoo.com >>> _______________________________________________ >>> edk2-devel mailing list >>> edk2-devel@lists.01.org >>> https://lists.01.org/mailman/listinfo/edk2-devel >> _______________________________________________ >> edk2-devel mailing list >> edk2-devel@lists.01.org >> https://lists.01.org/mailman/listinfo/edk2-devel _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel
