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Profiler: Store event type as enum

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Also check for the most common event type (sample) first instead of
leaving it as the fallback. This avoids a lot of string comparisons
while parsing profiles.
This commit is contained in:
Andreas Kling 2021-08-13 01:51:30 +02:00
parent 5a2ccbffc5
commit 7abf58ecaf
2 changed files with 45 additions and 19 deletions
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49
Userland/DevTools/Profiler/Profile.cpp
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@ -77,9 +77,9 @@ void Profile::rebuild_tree()
HashTable<FlatPtr> live_allocations;
for_each_event_in_filter_range([&](auto& event) {
if (event.type == "malloc"sv)
if (event.type == Event::Type::Malloc)
live_allocations.set(event.ptr);
else if (event.type == "free"sv)
else if (event.type == Event::Type::Free)
live_allocations.remove(event.ptr);
});
@ -99,10 +99,10 @@ void Profile::rebuild_tree()
m_filtered_event_indices.append(event_index);
if (event.type == "malloc"sv && !live_allocations.contains(event.ptr))
if (event.type == Event::Type::Malloc && !live_allocations.contains(event.ptr))
continue;
if (event.type == "free"sv)
if (event.type == Event::Type::Free)
continue;
auto for_each_frame = [&]<typename Callback>(Callback callback) {
@ -239,23 +239,27 @@ Result<NonnullOwnPtr<Profile>, String> Profile::load_from_perfcore_file(const St
next_serial.increment();
event.timestamp = perf_event.get("timestamp").to_number<u64>();
event.lost_samples = perf_event.get("lost_samples").to_number<u32>();
event.type = perf_event.get("type").to_string();
event.pid = perf_event.get("pid").to_i32();
event.tid = perf_event.get("tid").to_i32();
bool is_signpost = false;
auto type_string = perf_event.get("type").to_string();
if (event.type == "malloc"sv) {
if (type_string == "sample"sv) {
event.type = Event::Type::Sample;
} else if (type_string == "malloc"sv) {
event.type = Event::Type::Malloc;
event.ptr = perf_event.get("ptr").to_number<FlatPtr>();
event.size = perf_event.get("size").to_number<size_t>();
} else if (event.type == "free"sv) {
} else if (type_string == "free"sv) {
event.type = Event::Type::Free;
event.ptr = perf_event.get("ptr").to_number<FlatPtr>();
} else if (event.type == "signpost"sv) {
is_signpost = true;
} else if (type_string == "signpost"sv) {
event.type = Event::Type::Signpost;
auto string_id = perf_event.get("arg1").to_number<FlatPtr>();
event.signpost_string = profile_strings.get(string_id).value_or(String::formatted("Signpost #{}", string_id));
event.arg2 = perf_event.get("arg2").to_number<FlatPtr>();
} else if (event.type == "mmap"sv) {
} else if (type_string == "mmap"sv) {
event.type = Event::Type::Mmap;
event.ptr = perf_event.get("ptr").to_number<FlatPtr>();
event.size = perf_event.get("size").to_number<size_t>();
event.name = perf_event.get("name").to_string();
@ -264,11 +268,13 @@ Result<NonnullOwnPtr<Profile>, String> Profile::load_from_perfcore_file(const St
if (it != current_processes.end())
it->value->library_metadata.handle_mmap(event.ptr, event.size, event.name);
continue;
} else if (event.type == "munmap"sv) {
} else if (type_string == "munmap"sv) {
event.type = Event::Type::Munmap;
event.ptr = perf_event.get("ptr").to_number<FlatPtr>();
event.size = perf_event.get("size").to_number<size_t>();
continue;
} else if (event.type == "process_create"sv) {
} else if (type_string == "process_create"sv) {
event.type = Event::Type::ProcessCreate;
event.parent_pid = perf_event.get("parent_pid").to_number<FlatPtr>();
event.executable = perf_event.get("executable").to_string();
@ -283,7 +289,8 @@ Result<NonnullOwnPtr<Profile>, String> Profile::load_from_perfcore_file(const St
current_processes.set(sampled_process->pid, sampled_process);
all_processes.append(move(sampled_process));
continue;
} else if (event.type == "process_exec"sv) {
} else if (type_string == "process_exec"sv) {
event.type = Event::Type::ProcessExec;
event.executable = perf_event.get("executable").to_string();
auto old_process = current_processes.get(event.pid).value();
@ -302,23 +309,29 @@ Result<NonnullOwnPtr<Profile>, String> Profile::load_from_perfcore_file(const St
current_processes.set(sampled_process->pid, sampled_process);
all_processes.append(move(sampled_process));
continue;
} else if (event.type == "process_exit"sv) {
} else if (type_string == "process_exit"sv) {
event.type = Event::Type::ProcessExit;
auto old_process = current_processes.get(event.pid).value();
old_process->end_valid = event.serial;
current_processes.remove(event.pid);
continue;
} else if (event.type == "thread_create"sv) {
} else if (type_string == "thread_create"sv) {
event.type = Event::Type::ThreadCreate;
event.parent_tid = perf_event.get("parent_tid").to_i32();
auto it = current_processes.find(event.pid);
if (it != current_processes.end())
it->value->handle_thread_create(event.tid, event.serial);
continue;
} else if (event.type == "thread_exit"sv) {
} else if (type_string == "thread_exit"sv) {
event.type = Event::Type::ThreadExit;
auto it = current_processes.find(event.pid);
if (it != current_processes.end())
it->value->handle_thread_exit(event.tid, event.serial);
continue;
} else {
dbgln("Unknown event type '{}'", type_string);
VERIFY_NOT_REACHED();
}
auto maybe_kernel_base = Symbolication::kernel_base();
@ -362,7 +375,7 @@ Result<NonnullOwnPtr<Profile>, String> Profile::load_from_perfcore_file(const St
FlatPtr innermost_frame_address = event.frames.at(1).address;
event.in_kernel = maybe_kernel_base.has_value() && innermost_frame_address >= maybe_kernel_base.value();
if (is_signpost)
if (event.type == Event::Type::Signpost)
signposts.append(move(event));
else
events.append(move(event));