Date: Tue, 20 Oct 2015 09:00:06 +0100 From: hoplaahei@openmailbox.org To: freebsd-ports-bugs@freebsd.org Subject: Firefox 40.0.3 extremely high CPU usage on HTML 5 videos (Intel driver) Message-ID: <a2d96fdebe801c20e37f99f2232fd333@openmailbox.org>
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Machine is Thinkpad x230 i5-3320M HD 4000 graphics with Intel driver
<pre>
glxinfo | grep render
direct rendering: Yes
GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer,
GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer,
OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile
GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth,
GL_NV_conditional_render, GL_NV_depth_clamp,
GL_NV_packed_depth_stencil,
GL_ARB_conditional_render_inverted, GL_ARB_conservative_depth,
GL_NV_blend_square, GL_NV_conditional_render, GL_NV_depth_clamp,
GL_OES_fbo_render_mipmap, GL_OES_get_program_binary,
GL_OES_mapbuffer,
</pre>
Firefox CPU usage is extremely high playing HTML 5 videos (150% in htop)
until recompiling audio/alsa-plugins with:
<pre>
BLKCNT_P2=on: Restrict number of fragments to ^2 aligned
BUFSZ_P2=on: Restrict buffer size to ^2 aligned
</pre>
This reduces CPU usage to around 25%, which is tolerable.
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