{"id":1241,"date":"2008-06-27T06:20:12","date_gmt":"2008-06-27T04:20:12","guid":{"rendered":"http:\/\/vizZzion.org\/blog\/2008\/06\/benchmarking-xrender-performance-how-to-file-nvidia-bugs\/"},"modified":"2008-06-27T06:20:12","modified_gmt":"2008-06-27T04:20:12","slug":"benchmarking-xrender-performance-how-to-file-nvidia-bugs","status":"publish","type":"post","link":"https:\/\/vizZzion.org\/blog\/2008\/06\/benchmarking-xrender-performance-how-to-file-nvidia-bugs\/","title":{"rendered":"benchmarking XRender performance, how to file nvidia bugs"},"content":{"rendered":"

Blauzahl<\/a> asks where to file
\nbugs we encounter in the nvidia drivers. Last night, after my
\nprevious blogentry<\/a>
\nFredrik told me he disagreed that it’s hard to find nvidia engineers
\nthat can help with this kind of performance problems. It seems some hang out in
\n#xorg-devel, and our planet admin Chris Lee is currently working on the NVidia
\nLinux team as well. Fredrik pointed me to a benchmark that measures the performance
\nof various XRender calls. Running it shows that most of the tests are
\nvery fast (1 – 20 milliseconds) or very slow (most between 8 and 16 seconds).
\nThat means lots of operations take 400 times as long as others. On my notebook’s
\nati x1300 using the fglrx driver, I get results of 20 milliseconds for the ‘faster’
\noperations. Not a single test takes more than 2.5 seconds. So nvidia is faster
\n, but only for some tests. Overall, ATI performs better in these tests. And then
\nmaybe those operations can be accelerated in the driver. xrenderbenchmark
\ntakes ~13 minutes on my nvidia 7600GS
\nand 1:45 on my ati x1300, a fairly low-end laptop chip. In order to compile
\nxrenderbenchmark, first “qmake xrenderbenchmark.pro” (make sure you use Qt4’s
\nqmake). Then run make, and xrenderbenchmark.<\/p>\n

\nSo if you encounter those performance problems,
\nget Zack’s
\nbenchmark<\/a> and provide the data to the nvidia developers. The problems should
\nbe filed as a bug on the product xorg, component “Driver\/nVidia (proprietary)” on bugs.freedesktop.org<\/a>. I’ve
\nfiled the performance issues here<\/a>,
\nalong with some my logfiles.<\/p>\n

\nUpdate:<\/strong> I’m not the first finding out about this.
\nNice pictures<\/a> showing the performance
\nproblems and lots of reports on the
\nPhoronix forums<\/a>. All
\nreporting abominable 2d performance with NVidia graphics cards and drivers.<\/p>\n","protected":false},"excerpt":{"rendered":"

Blauzahl asks where to file bugs we encounter in the nvidia drivers. Last night, after my previous blogentry Fredrik told me he disagreed that it’s hard to find nvidia engineers that can help with this kind of performance problems. It seems some hang out in #xorg-devel, and our planet admin Chris Lee is currently working… Continue reading benchmarking XRender performance, how to file nvidia bugs<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[],"class_list":["post-1241","post","type-post","status-publish","format-standard","hentry","category-kde"],"_links":{"self":[{"href":"https:\/\/vizZzion.org\/blog\/wp-json\/wp\/v2\/posts\/1241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vizZzion.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vizZzion.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vizZzion.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vizZzion.org\/blog\/wp-json\/wp\/v2\/comments?post=1241"}],"version-history":[{"count":0,"href":"https:\/\/vizZzion.org\/blog\/wp-json\/wp\/v2\/posts\/1241\/revisions"}],"wp:attachment":[{"href":"https:\/\/vizZzion.org\/blog\/wp-json\/wp\/v2\/media?parent=1241"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vizZzion.org\/blog\/wp-json\/wp\/v2\/categories?post=1241"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vizZzion.org\/blog\/wp-json\/wp\/v2\/tags?post=1241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}