igt@gem_tiled_(wc|(blits|fence_blits)@(normal|interruptible)) are agonizingly slow on all platforms
The following tests are responsible for a significant amount of the overall reported time of a CI FULL run:
- igt@gem_fence_thrash@bo-write-verify-threaded-[xy]
- igt@gem_tiled_blits@interruptible
- igt@gem_tiled_fence_blits@normal
- igt@gem_tiled_blits@normal
- igt@gem_tiled_wc
And here is their impact:
- shard-skl: 2.7% (~6.5 minutes)
- shard-kbl: 2% (~2.5 minutes)
- shard-apl: 4.7% (~8.5 minutes)
- shard-glk: 3.5% (~8 minutes)
- shard-icl: 4.2% (~8.5 minutes)
- shard-tgl: 2.5% (~4.5 minutes)
Given how irrelevant the GTT is to modern userspace, we need to reduce the execution time of these tests to something more manageable.