Add the ability to track GPU allocations

[jrmuizel]

This works but I'm not inclined to have it land because the current allocation system is global and so if you're tracking GPU allocations you can't track any other kind of allocations.

[jrmuizel]

Here's an example profile: https://share.firefox.dev/40np7SB

[mstange]

What flags did you pass to xperf to get the D3DUmdLogging/MapAllocation events?

[mstange]

Jeff told me in person that he was using GPUView to record this trace, and that he needed to include allocation stacks.

[jrmuizel]

Here's my patch to log.cmd:

--- log.cmd     2023-06-14 20:28:42.000000000 +0000
+++ log-umd-stack.cmd   2025-07-15 22:31:15.978689700 +0000
@@ -58,7 +58,7 @@
 set TRACE_DXC_NORMAL=%TRACE_DXC%:0x900236:5
 set TRACE_DXC_VERBOSE=%TRACE_DXC%:0x80900236:5
 set TRACE_DXC_STACKS=%TRACE_DXC%:0x208041:5:'stack'
-set TRACE_UMD=a688ee40-d8d9-4736-b6f9-6b74935ba3b1:0xffff:5
+set TRACE_UMD=a688ee40-d8d9-4736-b6f9-6b74935ba3b1:0xffff:5:'stack'
 set TRACE_DWM=a42c77db-874f-422e-9b44-6d89fe2bd3e5:0x000000007fffffff:0x5
 set TRACE_DWM2=8c9dd1ad-e6e5-4b07-b455-684a9d879900:0xFFFF:6
 set TRACE_DWM3=9e9bba3c-2e38-40cb-99f4-9e8281425164:0xFFFF:6

[jrmuizel]

Which probably would work with something like:

xperf -start "NT Kernel Logger" -on latency -stackwalk profile+cswitch -start "usersession" -on c923f508-96e4-5515-e32c-7539d1b10504 Microsoft-Windows-DxgKrnl:1:1 Microsoft-Windows-DirectComposition a688ee40-d8d9-4736-b6f9-6b74935ba3b1:0xffff:5:'stack'
xperf -stop "NT Kernel Logger" -stop "usersession" -d out.etl