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| author | Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> | 2009-05-18 02:10:05 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-05-21 15:44:26 +1000 |
| commit | 80947e7c99c29ce3a78bdc1933b310468455a82f (patch) | |
| tree | d0403ed66d03aa7f6498c65193e1f56def6af13f /arch/powerpc/Kconfig.debug | |
| parent | f312deb4cd0c88196edf6dab192b7d42514398d6 (diff) | |
| download | lwn-80947e7c99c29ce3a78bdc1933b310468455a82f.tar.gz lwn-80947e7c99c29ce3a78bdc1933b310468455a82f.zip | |
powerpc: Keep track of emulated instructions
If CONFIG_PPC_EMULATED_STATS is enabled, make available counters for the
various classes of emulated instructions under
/sys/kernel/debug/powerpc/emulated_instructions/ (assumed debugfs is mounted on
/sys/kernel/debug). Optionally (controlled by
/sys/kernel/debug/powerpc/emulated_instructions/do_warn), rate-limited warnings
can be printed to the console when instructions are emulated.
Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/Kconfig.debug')
| -rw-r--r-- | arch/powerpc/Kconfig.debug | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug index a1098e23221f..d79a902d155a 100644 --- a/arch/powerpc/Kconfig.debug +++ b/arch/powerpc/Kconfig.debug @@ -41,6 +41,19 @@ config HCALL_STATS This option will add a small amount of overhead to all hypervisor calls. +config PPC_EMULATED_STATS + bool "Emulated instructions tracking" + depends on DEBUG_FS + help + Adds code to keep track of the number of instructions that are + emulated by the in-kernel emulator. Counters for the various classes + of emulated instructions are available under + powerpc/emulated_instructions/ in the root of the debugfs file + system. Optionally (controlled by + powerpc/emulated_instructions/do_warn in debugfs), rate-limited + warnings can be printed to the console when instructions are + emulated. + config CODE_PATCHING_SELFTEST bool "Run self-tests of the code-patching code." depends on DEBUG_KERNEL |