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Additional patches

This page provides a number of patches to the 2.6 kernel driver you might find useful.

IA-64 perfmon driver

This patch provides a perfmon-based interface for OProfile. This allows the use of the IA-64's performance counters with OProfile. Note that many machines have a firmware bug that will lead to unusual behaviour; typically, samples stop arriving after a short period of idle time. A work-around for this firmware bug is disable the CONFIG_IA64_PAL_IDLE kernel option.


Call-graph support

This patch provides support for call-graph profiling, currently only on x86. At each interrupt, the stack is recorded into the profile buffer, if the information is available in the registers. The user-space support for this, new in the 0.8 release, is still experimental.


More computing sins are committed in the name of efficiency (without necessarily achieving it) than for any other single reason - including blind stupidity. - W. A. Wulf