HP sv6 manual Pass through mode

installation and user information

optimization

	glEnable(GL_SUPERSAMPLE_HP);
	glDisable(GL_SUPERSAMPLE_HP);
	Depending upon application frame rates and window size, enabling
CAUTION
	scene anti-aliasing can impact performance significantly. With low
	frame rates and/or small windows, the performance impact is minor
	(5% or less). Also, when scene anti-aliasing is turned on, there is
	much less fx10 memory available for caching texture maps, so this
	can also impact rendering performance.

pass through mode

Applications that run in OpenGL immediate mode rather than running in display list mode do not scale well in performance. Immediate mode applications tend to run slower when executed on the sv6 architecture due to excessive network traffic.

To provide the best performance for immediate mode applications running on sv6 systems, a special mode called “pass through mode” has been implemented. When an application runs in pass through mode on an sv6 system, it bypasses the sv6 architecture and runs as if it were executing graphics on a standard workstation. This is the optimal mode for executing immediate mode OpenGL code on an sv6 configuration.

To enable pass through mode, simply set this variable right before you run the application then unset it before you start any other applications from the same shell:

Example (for Korn Shell):

export HPOGL_PASS_THROUGH=1 /applications/abc/run_abc unset HPOGL_PASS_THROUGH

or (for C Shell)

setenv HPOGL_PASS_THROUGH 1 /applications/abc/run_abc unsetenv HPOGL_PASS_THROUGH

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