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arch: x86: add irq runtime statistics

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Unlike tracing module mainly for debug usage, this is
to allow runtime profiling IRQ performance data, and
target to enable it in product release since platform
can choose to make it work with low weight protocol.

Enable this option and implement runtime_irq_stats()
in platform code, such as Intel ISH platform implement
with SHMI protocol to allow host profiling irq stats.

Signed-off-by: Qipeng Zha <qipeng.zha@intel.com>
This commit is contained in:
Qipeng Zha 2023-05-10 13:40:32 +08:00 • committed by Anas Nashif
commit d963767369
2 changed files with 17 additions and 0 deletions
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7
arch/x86/core/Kconfig.ia32
View file

@ -185,4 +185,11 @@ config X86_MFENCE_INSTRUCTION_SUPPORTED
Set n to disable the use of MFENCE instruction in arch_dcache_flush()
for X86 CPUs have CLFLUSH instruction but no MFENCE
config X86_RUNTIME_IRQ_STATS
bool
help
Add irq runtime statistics to allow runtime profiling irq performance
data with Host tools, enable this and implement platform dependent API
runtime_irq_stats().
endif # !X86_64

10
arch/x86/core/ia32/intstub.S
View file

@ -180,6 +180,16 @@ alreadyOnIntStack:
popl %eax
#endif
#if defined(CONFIG_X86_RUNTIME_IRQ_STATS)
/*
* The runtime_irq_stats() function should be implemented
* by platform with this config.
*/
pushl %eax
call runtime_irq_stats
popl %eax
#endif
xorl %eax, %eax
#if defined(CONFIG_X2APIC)
xorl %edx, %edx