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path: root/Kernel/PerformanceEventBuffer.cpp
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2020-11-30Kernel: Move some time related code from Scheduler into TimeManagementTom
Use the TimerQueue to expire blocking operations, which is one less thing the Scheduler needs to check on every iteration. Also, add a BlockTimeout class that will automatically handle relative or absolute timeouts as well as overriding timeouts (e.g. socket timeouts) more consistently. Also, rework the TimerQueue class to be able to fire events from any processor, which requires Timer to be RefCounted. Also allow creating id-less timers for use by blocking operations.
2020-08-17Kernel: Don't use copy_from_user() for kernelspace read in perf eventsAndreas Kling
Fixes #3182.
2020-08-16AK: Rename KB, MB, GB to KiB, MiB, GiBNico Weber
The SI prefixes "k", "M", "G" mean "10^3", "10^6", "10^9". The IEC prefixes "Ki", "Mi", "Gi" mean "2^10", "2^20", "2^30". Let's use the correct name, at least in code. Only changes the name of the constants, no other behavior change.
2020-08-10Kernel: PID/TID typingBen Wiederhake
This compiles, and contains exactly the same bugs as before. The regex 'FIXME: PID/' should reveal all markers that I left behind, including: - Incomplete conversion - Issues or things that look fishy - Actual bugs that will go wrong during runtime
2020-07-01Kernel: Turn Thread::current and Process::current into functionsTom
This allows us to query the current thread and process on a per processor basis
2020-04-11Kernel: Include the current instruction pointer in profile samplesAndreas Kling
We were missing the innermost instruction pointer when sampling. This makes the instruction-level profile info a lot cooler! :^)
2020-03-22Kernel: Run clang-format on filesShannon Booth
Let's rip off the band-aid
2020-03-08AK: Add global FlatPtr typedef. It's u32 or u64, based on sizeof(void*)Andreas Kling
Use this instead of uintptr_t throughout the codebase. This makes it possible to pass a FlatPtr to something that has u32 and u64 overloads.
2020-03-01Kernel: Fix suspicious local shadowing in PerformanceEventBufferAndreas Kling
2020-02-22Kernel+ProfileViewer: Move symbolication to userspace for time profilesAndreas Kling
This makes the time profiles look like the memory profiles so we can use the userspace symbolication code in ProfileViewer.
2020-02-17Kernel: Replace "current" with Thread::current and Process::currentAndreas Kling
Suggested by Sergey. The currently running Thread and Process are now Thread::current and Process::current respectively. :^)
2020-02-16Kernel: Move all code into the Kernel namespaceAndreas Kling
2020-02-02Kernel: Start working on a syscall for logging performance eventsAndreas Kling
This patch introduces sys$perf_event() with two event types: - PERF_EVENT_MALLOC - PERF_EVENT_FREE After the first call to sys$perf_event(), a process will begin keeping these events in a buffer. When the process dies, that buffer will be written out to "perfcore" in the current directory unless that filename is already taken. This is probably not the best way to do this, but it's a start and will make it possible to start doing memory allocation profiling. :^)