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ProfileViewer: Only show live allocations by default

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For memory profiles, we now keep track of which allocations are still
live at the end of the selected timeline range and only show those.

This is really cool, I have to admit. :^)
This commit is contained in:
Andreas Kling
2020-02-02 20:59:26 +01:00
parent 266d7ca268
commit 9dc78338ad
2 changed files with 37 additions and 0 deletions
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34
DevTools/ProfileViewer/Profile.cpp
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@@ -26,6 +26,7 @@
#include "Profile.h"
#include "ProfileModel.h"
#include <AK/HashTable.h>
#include <AK/MappedFile.h>
#include <AK/QuickSort.h>
#include <LibCore/CFile.h>
@@ -57,6 +58,15 @@ Profile::Profile(const JsonArray& json)
Sample sample;
sample.timestamp = sample_object.get("timestamp").to_number<u64>();
sample.type = sample_object.get("type").to_string();
if (sample.type == "malloc") {
sample.ptr = sample_object.get("ptr").to_number<u32>();
sample.size = sample_object.get("size").to_number<u32>();
} else if (sample.type == "free") {
sample.ptr = sample_object.get("ptr").to_number<u32>();
}
auto frames_value = sample_object.get("frames");
auto& frames_array = frames_value.as_array();
@@ -110,6 +120,8 @@ void Profile::rebuild_tree()
return new_root;
};
HashTable<uintptr_t> live_allocations;
for (auto& sample : m_samples) {
if (has_timestamp_filter_range()) {
auto timestamp = sample.timestamp;
@@ -117,6 +129,25 @@ void Profile::rebuild_tree()
continue;
}
if (sample.type == "malloc")
live_allocations.set(sample.ptr);
else if (sample.type == "free")
live_allocations.remove(sample.ptr);
}
for (auto& sample : m_samples) {
if (has_timestamp_filter_range()) {
auto timestamp = sample.timestamp;
if (timestamp < m_timestamp_filter_range_start || timestamp > m_timestamp_filter_range_end)
continue;
}
if (sample.type == "malloc" && !live_allocations.contains(sample.ptr))
continue;
if (sample.type == "free")
continue;
ProfileNode* node = nullptr;
auto for_each_frame = [&]<typename Callback>(Callback callback)
@@ -198,6 +229,9 @@ OwnPtr<Profile> Profile::load_from_perfcore_file(const StringView& path)
JsonObject object;
object.set("timestamp", perf_event.get("timestamp"));
object.set("type", perf_event.get("type"));
object.set("ptr", perf_event.get("ptr"));
object.set("size", perf_event.get("size"));
JsonArray frames_array;
auto stack_array = perf_event.get("stack").as_array();