RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 10:38:11 +00:00
Code Issues Activity Actions

Kernel+LibC: Add PERF_EVENT_SIGNPOST

Browse source 
This event will be used by userspace programs wanting to mark
interesting high-level events in the profile. :^)
This commit is contained in:
Andreas Kling 2021-08-11 20:04:03 +02:00
parent 84053816d5
commit 0d997d48ea
4 changed files with 17 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

9
Kernel/PerformanceEventBuffer.cpp
View file

@ -137,6 +137,10 @@ KResult PerformanceEventBuffer::append_with_ip_and_bp(ProcessID pid, ThreadID ti
break; break;
case PERF_EVENT_SYSCALL: case PERF_EVENT_SYSCALL:
break; break;
case PERF_EVENT_SIGNPOST:
event.data.signpost.arg1 = arg1;
event.data.signpost.arg2 = arg2;
break;
default: default:
return EINVAL; return EINVAL;
} }
@ -231,6 +235,11 @@ bool PerformanceEventBuffer::to_json_impl(Serializer& object) const
case PERF_EVENT_SYSCALL: case PERF_EVENT_SYSCALL:
event_object.add("type", "syscall"); event_object.add("type", "syscall");
break; break;
case PERF_EVENT_SIGNPOST:
event_object.add("type"sv, "signpost"sv);
event_object.add("arg1"sv, event.data.signpost.arg1);
event_object.add("arg2"sv, event.data.signpost.arg2);
break;
} }
event_object.add("pid", event.pid); event_object.add("pid", event.pid);
event_object.add("tid", event.tid); event_object.add("tid", event.tid);

6
Kernel/PerformanceEventBuffer.h
View file

@ -62,6 +62,11 @@ struct [[gnu::packed]] KFreePerformanceEvent {
FlatPtr ptr; FlatPtr ptr;
}; };
struct [[gnu::packed]] SignpostPerformanceEvent {
FlatPtr arg1;
FlatPtr arg2;
};
struct [[gnu::packed]] PerformanceEvent { struct [[gnu::packed]] PerformanceEvent {
u16 type { 0 }; u16 type { 0 };
u8 stack_size { 0 }; u8 stack_size { 0 };
@ -80,6 +85,7 @@ struct [[gnu::packed]] PerformanceEvent {
ContextSwitchPerformanceEvent context_switch; ContextSwitchPerformanceEvent context_switch;
KMallocPerformanceEvent kmalloc; KMallocPerformanceEvent kmalloc;
KFreePerformanceEvent kfree; KFreePerformanceEvent kfree;
SignpostPerformanceEvent signpost;
} data; } data;
static constexpr size_t max_stack_frame_count = 64; static constexpr size_t max_stack_frame_count = 64;
FlatPtr stack[max_stack_frame_count]; FlatPtr stack[max_stack_frame_count];

1
Kernel/UnixTypes.h
View file

@ -63,6 +63,7 @@ enum {
PERF_EVENT_KFREE = 4096, PERF_EVENT_KFREE = 4096,
PERF_EVENT_PAGE_FAULT = 8192, PERF_EVENT_PAGE_FAULT = 8192,
PERF_EVENT_SYSCALL = 16384, PERF_EVENT_SYSCALL = 16384,
PERF_EVENT_SIGNPOST = 32768,
}; };
#define WNOHANG 1 #define WNOHANG 1

1
Userland/Libraries/LibC/serenity.h
View file

@ -113,6 +113,7 @@ enum {
PERF_EVENT_KFREE = 4096, PERF_EVENT_KFREE = 4096,
PERF_EVENT_PAGE_FAULT = 8192, PERF_EVENT_PAGE_FAULT = 8192,
PERF_EVENT_SYSCALL = 16384, PERF_EVENT_SYSCALL = 16384,
PERF_EVENT_SIGNPOST = 32768,
}; };
#define PERF_EVENT_MASK_ALL (~0ull) #define PERF_EVENT_MASK_ALL (~0ull)