问题
Today I've run into a problem where any program I try to debug in VS2015 takes an age to load all the pdb's for my program and other programs (in the order of 20 minutes or more for a simple dx12 sample). I could skip them but actually I really want them loaded for various reasons.
This isn't a problem with the solution or project as I get the issue debugging standard microsoft samples ie the dx12 samples hosted on github. I believe all my settings are correct for the symbols settings, here's my settings:
I've also already tried emptying my symbols cache and loading them all again. This takes an age too! My symbols cache is on an SSD which looks to be working fine. My internet connection is fine 19ms ping, 45Mb down, 18.7Mb up.
One unexpected thing is that the messages say the symbols can't be found:
'D3D12Fullscreen.exe' (Win32): Loaded 'C:\Windows\System32\ntdll.dll'. Cannot find or open the PDB file. 'D3D12Fullscreen.exe' (Win32): Loaded 'C:\Windows\System32\kernel32.dll'. Cannot find or open the PDB file. 'D3D12Fullscreen.exe' (Win32): Loaded 'C:\Windows\System32\KernelBase.dll'. Cannot find or open the PDB file. 'D3D12Fullscreen.exe' (Win32): Loaded 'C:\Windows\System32\user32.dll'. Cannot find or open the PDB file. 'D3D12Fullscreen.exe' (Win32): Loaded 'C:\Windows\System32\win32u.dll'. Cannot find or open the PDB file. 'D3D12Fullscreen.exe' (Win32): Loaded 'C:\Windows\System32\dxgi.dll'. Cannot find or open the PDB file. 'D3D12Fullscreen.exe' (Win32): Loaded 'C:\Windows\System32\D3DCompiler_47.dll'. Cannot find or open the PDB file. 'D3D12Fullscreen.exe' (Win32): Loaded 'C:\Windows\System32\gdi32.dll'. Cannot find or open the PDB file. 'D3D12Fullscreen.exe' (Win32): Loaded 'C:\Windows\System32\msvcrt.dll'. Cannot find or open the PDB file. 'D3D12Fullscreen.exe' (Win32): Loaded 'C:\Windows\System32\gdi32full.dll'. Cannot find or open the PDB file.
(that just took 10 mins to get that far btw). That is really strange as you can see they are all standard dll's.
Any help would be greatly appreciated.
Many thanks in advance.
I'm using this version of VS2015:
Microsoft Visual Studio Enterprise 2015 Version 14.0.25425.01 Update 3 Microsoft .NET Framework Version 4.6.02001
Installed Version: Enterprise
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System info from dxdiag:
------------------ System Information
Time of this report: 9/4/2016, 22:15:11 Machine name: REMOVED Machine Id: Unknown Operating System: Windows 10 Pro Insider Preview 64-bit (10.0, Build 14915) (14915.rs_prerelease.160826-1902) Language: English (Regional Setting: English) System Manufacturer: LENOVO System Model: 20378 BIOS: 9ECN31WW(V1.14) Processor: Intel(R) Core(TM) i7-4710HQ CPU @ 2.50GHz (8 CPUs), ~2.5GHz Memory: 16384MB RAM Available OS Memory: 16296MB RAM Page File: 6018MB used, 13221MB available Windows Dir: C:\WINDOWS DirectX Version: DirectX 12 DX Setup Parameters: Not found User DPI Setting: Using System DPI System DPI Setting: 240 DPI (250 percent) DWM DPI Scaling: UnKnown Miracast: Available, with HDCP Microsoft Graphics Hybrid: Supported DxDiag Version: 10.00.14915.1000 32bit Unicode
回答1:
Seems to be an issue with the symbol server. Alot of people are having the issue atm.
Source: https://social.msdn.microsoft.com/Forums/en-US/35a31403-24f5-4552-8e3c-4c65f2b98c17/microsoft-symbol-server-is-slowbroken?forum=windbg
Also if you search "symbol server" on twitter you will see that this is apperently a known issue and that you are not the only one having to deal with this in recent days...
回答2:
Try disabling IntelliTrace in tools/options in VS2015. I had the same slowness issue and that fixed it.
来源：https://stackoverflow.com/questions/39321665/vs2015-is-really-slow-loading-symbols