[gallium] Frequent asserts in SynMark2 Multithread
Iris has always had problems with SynMark2 Multithread test:
src/gallium/auxiliary/util/u_inlines.h:87:pipe_reference_described: Assertion `count != -1' failed.
although Multithread test works fine with i965.
I initially thought that to be a kernel issue, but that: drm/intel#366, was eventually closed with: drm/intel#673, and Iris issues still continued.
Note: Iris works nowadays fine also with HdrBloom tests, which is very similar to Multithread, just less threaded / CPU bound.
Because this issue happens only something like 2/3 of the runs, it seems to be a timing dependent / race-condition.