Commit graph

12 commits

Author SHA1 Message Date
Andreas Kling
d5d54da0ea Kernel: Don't use copy_from_user() for kernelspace read in perf events
Fixes #3182.
2020-08-17 09:57:18 +02:00
Nico Weber
430b265cd4 AK: Rename KB, MB, GB to KiB, MiB, GiB
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.
2020-08-16 16:33:28 +02:00
Ben Wiederhake
f5744a6f2f Kernel: PID/TID typing
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
2020-08-10 11:51:45 +02:00
Tom
16783bd14d Kernel: Turn Thread::current and Process::current into functions
This allows us to query the current thread and process on a
per processor basis
2020-07-01 12:07:01 +02:00
Andreas Kling
b7ff3b5ad1 Kernel: Include the current instruction pointer in profile samples
We were missing the innermost instruction pointer when sampling.
This makes the instruction-level profile info a lot cooler! :^)
2020-04-11 21:04:45 +02:00
Shannon Booth
81adefef27 Kernel: Run clang-format on files
Let's rip off the band-aid
2020-03-22 01:22:32 +01:00
Andreas Kling
b1058b33fb AK: Add global FlatPtr typedef. It's u32 or u64, based on sizeof(void*)
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.
2020-03-08 13:06:51 +01:00
Andreas Kling
7e6c2068bf Kernel: Fix suspicious local shadowing in PerformanceEventBuffer 2020-03-01 21:08:04 +01:00
Andreas Kling
983b4bd9f2 Kernel+ProfileViewer: Move symbolication to userspace for time profiles
This makes the time profiles look like the memory profiles so we can
use the userspace symbolication code in ProfileViewer.
2020-02-22 10:09:54 +01:00
Andreas Kling
48f7c28a5c Kernel: Replace "current" with Thread::current and Process::current
Suggested by Sergey. The currently running Thread and Process are now
Thread::current and Process::current respectively. :^)
2020-02-17 15:04:27 +01:00
Andreas Kling
a356e48150 Kernel: Move all code into the Kernel namespace 2020-02-16 01:27:42 +01:00
Andreas Kling
3879e5b9d4 Kernel: Start working on a syscall for logging performance events
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. :^)
2020-02-02 20:26:27 +01:00