<div dir="ltr"><div class="gmail_default" style="font-size:small">Hi Brian, all,<br><br></div><div class="gmail_default" style="font-size:small">Thanks for the follow-up, and congrats to the team for the prompt bug fix! We've just tweeted about it:<br><a href="https://twitter.com/GraphicsFuzz/status/968815766681333760">https://twitter.com/GraphicsFuzz/status/968815766681333760</a><br><br></div><div class="gmail_default" style="font-size:small">We'll be pleased to report further Mesa issues as we find them, yet as a three-people team we unfortunately do not have the human resources to do proper testing of Mesa on various platforms right now.<br><br>Meanwhile, our public demo gives a nice excerpt of our test suite, and is easily ran via a web browser, so don't hesitate to try it on your devices:<br><a href="http://www.graphicsfuzz.com/#demo">http://www.graphicsfuzz.com/#demo</a><br></div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Please let us know if it triggers other issues in Mesa!<br><br></div><div class="gmail_default" style="font-size:small">Many thanks,<br></div><div class="gmail_default" style="font-size:small">Hugues<br></div><div class="gmail_default" style="font-size:small"><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On 27 February 2018 at 23:40, Brian Paul <span dir="ltr"><<a href="mailto:brianp@vmware.com" target="_blank">brianp@vmware.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 02/27/2018 10:27 AM, Hugues Evrard wrote:<br>
</span><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">
Hi all,<br>
<br>
I have just reported a Mesa (i965) crash which was triggered by a shader from the GraphicsFuzz demo (bug ID 105271), and I wanted to give a broader context on that bug report.<br>
<br></span>
We are three academics (Alastair, Paul and myself) from Imperial College London who work on metamorphic testing of shader compilers, last year we reported drivers bugs across all major GPU vendors and wrote some blog posts about this (<a href="https://medium.com/@afd_icl/689d15ce922b" rel="noreferrer" target="_blank">https://medium.com/@afd_icl/6<wbr>89d15ce922b</a> <<a href="https://urldefense.proofpoint.com/v2/url?u=https-3A__medium.com_-40afd-5Ficl_689d15ce922b&d=DwMFaQ&c=uilaK90D4TOVoH58JNXRgQ&r=Ie7_encNUsqxbSRbqbNgofw0ITcfE8JKfaUjIQhncGA&m=IXuO7p4yYdvVl_wrG-_cBRZTgrbYT-aP0C5xQNl3hlU&s=cSYEtIjkXjH08DSPfDfe8muZ-dBkGxI-hJIFGGujT9I&e=" rel="noreferrer" target="_blank">https://urldefense.proofpoint<wbr>.com/v2/url?u=https-3A__<wbr>medium.com_-40afd-5Ficl_689d15<wbr>ce922b&d=DwMFaQ&c=uilaK90D4TOV<wbr>oH58JNXRgQ&r=Ie7_encNUsqxbSRbq<wbr>bNgofw0ITcfE8JKfaUjIQhncGA&m=<wbr>IXuO7p4yYdvVl_wrG-_cBRZTgrbYT-<wbr>aP0C5xQNl3hlU&s=cSYEtIjkXjH08D<wbr>SPfDfe8muZ-dBkGxI-hJIFGGujT9I&<wbr>e=</a>>). We also had the chance to visit some driver developers, including the Intel Mesa team in Portland -- thanks again for hosting us!<span class=""><br>
<br>
After months of further development and tedious paperwork, we are now spinning GraphicsFuzz out of academia with the aim to raise graphics drivers reliability across the board. Our first effort focuses on the mobile landscape, you can see wrong images and crashes due to graphics driver bugs in the Samsung S8s, Nvidia Shields, Google NexusTV and Pixels, Huawei Honors and Apple iPhones here (more to come!):<br>
</span><a href="http://www.graphicsfuzz.com/#results" rel="noreferrer" target="_blank">http://www.graphicsfuzz.com/#r<wbr>esults</a> <<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.graphicsfuzz.com_-23results&d=DwMFaQ&c=uilaK90D4TOVoH58JNXRgQ&r=Ie7_encNUsqxbSRbqbNgofw0ITcfE8JKfaUjIQhncGA&m=IXuO7p4yYdvVl_wrG-_cBRZTgrbYT-aP0C5xQNl3hlU&s=j3eMhe_uZIVNtxkBTwgU0xcl6vvyPHN9lbg6qa3wihw&e=" rel="noreferrer" target="_blank">https://urldefense.proofpoint<wbr>.com/v2/url?u=http-3A__www.<wbr>graphicsfuzz.com_-23results&d=<wbr>DwMFaQ&c=uilaK90D4TOVoH58JNXRg<wbr>Q&r=Ie7_encNUsqxbSRbqbNgofw0IT<wbr>cfE8JKfaUjIQhncGA&m=<wbr>IXuO7p4yYdvVl_wrG-_cBRZTgrbYT-<wbr>aP0C5xQNl3hlU&s=j3eMhe_uZIVNtx<wbr>kBTwgU0xcl6vvyPHN9lbg6qa3wihw&<wbr>e=</a>><br>
<br>
On the technical side, a summary of our testing approach is here: <a href="http://www.graphicsfuzz.com/howitworks.html" rel="noreferrer" target="_blank">http://www.graphicsfuzz.com/ho<wbr>witworks.html</a> <<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.graphicsfuzz.com_howitworks.html&d=DwMFaQ&c=uilaK90D4TOVoH58JNXRgQ&r=Ie7_encNUsqxbSRbqbNgofw0ITcfE8JKfaUjIQhncGA&m=IXuO7p4yYdvVl_wrG-_cBRZTgrbYT-aP0C5xQNl3hlU&s=tQS-TpnGyPrWxUzZZFY4UE-Q1Ta0QkcptHGtzjSx3uU&e=" rel="noreferrer" target="_blank">https://urldefense.proofpoint<wbr>.com/v2/url?u=http-3A__www.<wbr>graphicsfuzz.com_howitworks.<wbr>html&d=DwMFaQ&c=uilaK90D4TOVoH<wbr>58JNXRgQ&r=Ie7_encNUsqxbSRbqbN<wbr>gofw0ITcfE8JKfaUjIQhncGA&m=<wbr>IXuO7p4yYdvVl_wrG-_cBRZTgrbYT-<wbr>aP0C5xQNl3hlU&s=tQS-<wbr>TpnGyPrWxUzZZFY4UE-Q1Ta0QkcptH<wbr>GtzjSx3uU&e=</a>><span class=""><br>
<br>
We are looking forward to cover the Mesa drivers, but not immediately given our current focus on mobile devices. Meanwhile, anyone can easily try our demo, which executes 15 of our test shaders, on any WebGL2-capable web browser. Today's bug report comes from this demo, which crashes i956 (Mesa 17.3.3) on my Intel HD 520:<br>
</span><a href="http://www.graphicsfuzz.com/#demo" rel="noreferrer" target="_blank">http://www.graphicsfuzz.com/#d<wbr>emo</a> <<a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.graphicsfuzz.com_-23demo&d=DwMFaQ&c=uilaK90D4TOVoH58JNXRgQ&r=Ie7_encNUsqxbSRbqbNgofw0ITcfE8JKfaUjIQhncGA&m=IXuO7p4yYdvVl_wrG-_cBRZTgrbYT-aP0C5xQNl3hlU&s=qWeYO3iPLlVvvHP2MJIQSnvHh7BTqxQBDNd4Uu_Q0NY&e=" rel="noreferrer" target="_blank">https://urldefense.proofpoint<wbr>.com/v2/url?u=http-3A__www.<wbr>graphicsfuzz.com_-23demo&d=<wbr>DwMFaQ&c=uilaK90D4TOVoH58JNXRg<wbr>Q&r=Ie7_encNUsqxbSRbqbNgofw0IT<wbr>cfE8JKfaUjIQhncGA&m=<wbr>IXuO7p4yYdvVl_wrG-_cBRZTgrbYT-<wbr>aP0C5xQNl3hlU&s=qWeYO3iPLlVvvH<wbr>P2MJIQSnvHh7BTqxQBDNd4Uu_Q0NY&<wbr>e=</a>><span class=""><br>
<br>
Please let me know if the demo crashes other Mesa setups, we will be happy to help providing good reproduction examples!<br>
<br>
Many thanks, and if you have questions or feedback, we are all ears :)<br>
Hugues<br>
</span></blockquote>
<br>
Hi Hughes,<br>
<br>
I've been followed your work since I came across it a few months ago. It's a great project.  I look forward to finding/fixing any issues in Mesa.<br>
<br>
I'm cc'ing your message to the mesa-dev list.  That's probably the better place to get the attention of the i965 driver developers.  Also, you should probably file a Mesa bug for any issues you find.<span class="HOEnZb"><font color="#888888"><br>
<br>
-Brian<br>
</font></span><br>
PS: Sorry about mangling your URLs above.  It's a VMware mail thing. :-(<br>
<br>
<br>
</blockquote></div><br></div>