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tracing: add TRACING_ISR Kconfig

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Add TRACING_ISR Kconfig to help high latency backend working well.

Currently the ISR tracing hook function is put at the begining and
ending of ISR wrapper, when there is ISR needed in the tracing path
(especially tracing backend), it will cause tracing buffer easily
be exhausted if async tracing method enabled. Also it will increase
system latency if all the ISRs are traced. So add TRACING_ISR to
enable/disable ISR tracing here. Later a filter out mechanism based
on irq number will be added.

Signed-off-by: Wentong Wu <wentong.wu@intel.com>
This commit is contained in:
Wentong Wu 2020-01-28 16:44:59 +08:00 committed by Anas Nashif
parent 10a669ea87
commit aa5d45d7cc
5 changed files with 14 additions and 4 deletions
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4
arch/arm/core/aarch32/isr_wrapper.S
View file

@ -64,7 +64,7 @@ SECTION_FUNC(TEXT, _isr_wrapper)
bl read_timer_start_of_isr
#endif
#ifdef CONFIG_TRACING
#ifdef CONFIG_TRACING_ISR
bl sys_trace_isr_enter
#endif
@ -162,7 +162,7 @@ _idle_state_cleared:
#endif /* CONFIG_EXECUTION_BENCHMARKING */
blx r3 /* call ISR */
#ifdef CONFIG_TRACING
#ifdef CONFIG_TRACING_ISR
bl sys_trace_isr_exit
#endif

4
arch/nios2/core/irq_manage.c
View file

@ -87,7 +87,9 @@ void _enter_irq(u32_t ipending)
while (ipending) {
struct _isr_table_entry *ite;
#ifdef CONFIG_TRACING_ISR
sys_trace_isr_enter();
#endif
index = find_lsb_set(ipending) - 1;
ipending &= ~BIT(index);
@ -99,7 +101,9 @@ void _enter_irq(u32_t ipending)
read_timer_end_of_isr();
#endif
ite->isr(ite->arg);
#ifdef CONFIG_TRACING_ISR
sys_trace_isr_exit();
#endif
}
_kernel.nested--;

2
arch/riscv/core/isr.S
View file

@ -228,7 +228,7 @@ on_irq_stack:
call_irq:
#endif /* CONFIG_IRQ_OFFLOAD */
#ifdef CONFIG_TRACING
#ifdef CONFIG_TRACING_ISR
call sys_trace_isr_enter
#endif

2
arch/x86/core/ia32/intstub.S
View file

@ -130,7 +130,7 @@ SECTION_FUNC(TEXT, _interrupt_enter)
pushl %edi
#if defined(CONFIG_TRACING)
#if defined(CONFIG_TRACING_ISR)
/* Save these as we are using to keep track of isr and isr_param */
pushl %eax

6
subsys/debug/Kconfig
View file

@ -158,6 +158,12 @@ config TRACING_CMD_BUFFER_SIZE
help
Size of tracing command buffer.
config TRACING_ISR
bool "Enabling Tracing ISR"
help
Enable tracing ISR. This requires the backend to be
very low-latency.
endif
config ASAN