[Bug 97017] [SKL GT3e guc bisected] ~10% performance drop in most benchmarks

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97017

--- Comment #21 from Carlos Santa <carlos.santa at intel.com> ---
The latest update on this front:

Next steps:

1. Continue experimenting w/ at least 4 more different builds to prove that the
performance issue is somehow related to the inter dependencies between the
changes from the last bad commit (commit
b7137e0cf1e55b5b0cb88fbd85425a1bc0d24c3a - "drm/i915: Defer enabling rc6 til
after we submit the first batch/context") and having the system w/ GuC enabled
for load/submission.

The 4 builds include:

a. Last good commit + no GuC
b. Last good commit + GuC
c. Last bad commit + no GuC
d. Last badd commit + GuC

2. Try with the latest (approved from VPG) GuC w/ version 9.x as suggested by
Chris W to see if there is an improvement to WaRsDisableCoarsePowerGating()
which is related to the RC6 changes affecting SKL. (Note, on SKL we are in fact
using an older version of the GuC).

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
You are on the CC list for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20161011/006a7b88/attachment.html>