Archive for the ‘exa’ tag
X-Server 1.5.0 very sluggish
最近升到 xorg 1.5.0，某些操作 (terminal 快速更新) 會使 xserver 佔用非常多 cpu，看來是這個問題
Working on it … right now it looks like:
XShm pixmaps got accidentally reenabled in the course of Adam’s changes
Someone (maybe GTK, having tracked it down yet) is taking advantage
of that by creating a shared pixmap and using it as the source for a composite operation.That is not handled well in EXA and triggers migration of the destination back to system memory. (*)
– Owen
(*) One of the many cases where we’d be better off creating temporaries in video memory to avoid migration.
測測..
video-intel 2.5 & EXA
video-intel 自從 2.2 版就預設使用 EXA 加速，而這個新一代的加速引擎卻因為在文字的顯示上非常緩慢，掩蓋了 EXA 本身的優良特性，Debian BTS 上也怨聲載道。video-intel 2.5 Carl Worth 終於解決了這個問題，原來是因為使用過小的 buffer，導致每次 driver 都要等待上一次 composite operation 結束才能重新使用 buffer，在加大 buffer 之後，EXA 的 text rendering 速度甚至超過了 XAA！
全面轉換至 EXA，引入 GEM，video-intel 的效能只會越來越好 