diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-06 21:48:41 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-06 21:48:41 +0300 |
| commit | 95107b30be68953e3a4f1c3994c2233500502ccf (patch) | |
| tree | ed1824ce842d9813f2ee8a5fa8683e0d6b13f662 /include | |
| parent | 541efb7632642cab55361178d73d544f025b593c (diff) | |
| parent | a0d0c6216afad4b2b1704a72bd76bea259e07655 (diff) | |
| download | linux-95107b30be68953e3a4f1c3994c2233500502ccf.tar.xz | |
Merge tag 'trace-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing updates from Steven Rostedt:
"This release cycle is rather small. Just a few fixes to tracing.
The big change is the addition of the hwlat tracer. It not only
detects SMIs, but also other latency that's caused by the hardware. I
have detected some latency from large boxes having bus contention"
* tag 'trace-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Call traceoff trigger after event is recorded
ftrace/scripts: Add helper script to bisect function tracing problem functions
tracing: Have max_latency be defined for HWLAT_TRACER as well
tracing: Add NMI tracing in hwlat detector
tracing: Have hwlat trace migrate across tracing_cpumask CPUs
tracing: Add documentation for hwlat_detector tracer
tracing: Added hardware latency tracer
ftrace: Access ret_stack->subtime only in the function profiler
function_graph: Handle TRACE_BPUTS in print_graph_comment
tracing/uprobe: Drop isdigit() check in create_trace_uprobe
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ftrace.h | 2 | ||||
| -rw-r--r-- | include/linux/ftrace_irq.h | 31 |
2 files changed, 29 insertions, 4 deletions
diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h index 6f93ac46e7f0..b3d34d3e0e7e 100644 --- a/include/linux/ftrace.h +++ b/include/linux/ftrace.h @@ -794,7 +794,9 @@ struct ftrace_ret_stack { unsigned long ret; unsigned long func; unsigned long long calltime; +#ifdef CONFIG_FUNCTION_PROFILER unsigned long long subtime; +#endif #ifdef HAVE_FUNCTION_GRAPH_FP_TEST unsigned long fp; #endif diff --git a/include/linux/ftrace_irq.h b/include/linux/ftrace_irq.h index dca7bf8cffe2..4ec2c9b205f2 100644 --- a/include/linux/ftrace_irq.h +++ b/include/linux/ftrace_irq.h @@ -3,11 +3,34 @@ #ifdef CONFIG_FTRACE_NMI_ENTER -extern void ftrace_nmi_enter(void); -extern void ftrace_nmi_exit(void); +extern void arch_ftrace_nmi_enter(void); +extern void arch_ftrace_nmi_exit(void); #else -static inline void ftrace_nmi_enter(void) { } -static inline void ftrace_nmi_exit(void) { } +static inline void arch_ftrace_nmi_enter(void) { } +static inline void arch_ftrace_nmi_exit(void) { } #endif +#ifdef CONFIG_HWLAT_TRACER +extern bool trace_hwlat_callback_enabled; +extern void trace_hwlat_callback(bool enter); +#endif + +static inline void ftrace_nmi_enter(void) +{ +#ifdef CONFIG_HWLAT_TRACER + if (trace_hwlat_callback_enabled) + trace_hwlat_callback(true); +#endif + arch_ftrace_nmi_enter(); +} + +static inline void ftrace_nmi_exit(void) +{ + arch_ftrace_nmi_exit(); +#ifdef CONFIG_HWLAT_TRACER + if (trace_hwlat_callback_enabled) + trace_hwlat_callback(false); +#endif +} + #endif /* _LINUX_FTRACE_IRQ_H */ |