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CONFIG_HCALL_STATS: Hypervisor call instrumentation

General informations

The Linux kernel configuration item CONFIG_HCALL_STATS:

Help text

Adds code to keep track of the number of hypervisor calls made and the amount of time spent in hypervisor calls. Wall time spent in each call is always calculated, and if available CPU cycles spent are also calculated. A directory named hcall_inst is added at the root of the debugfs filesystem. Within the hcall_inst directory are files that contain CPU specific call statistics.

This option will add a small amount of overhead to all hypervisor calls.

Hardware

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