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| author |   Leonardo Bras <leobras@redhat.com> | 2023-06-15 03:59:45 -0300 |
|---|---|---|
| committer |   Peter Zijlstra <peterz@infradead.org> | 2023-06-16 22:08:09 +0200 |
| commit | 949fa3f11ced2a5c8e3737e73b09676adf4b322b (patch) | |
| tree | 280e923f561dadfad15c4fc564adf56dc93ec58a /scripts/generate_rust_analyzer.py | |
| parent | MAINTAINERS: Add CPU HOTPLUG entry (diff) | |
| download | wireguard-linux-949fa3f11ced2a5c8e3737e73b09676adf4b322b.tar.xz wireguard-linux-949fa3f11ced2a5c8e3737e73b09676adf4b322b.zip | |
trace,smp: Add tracepoints around remotelly called functions
The recently added ipi_send_{cpu,cpumask} tracepoints allow finding sources
of IPIs targeting CPUs running latency-sensitive applications.
For NOHZ_FULL CPUs, all IPIs are interference, and those tracepoints are
sufficient to find them and work on getting rid of them. In some setups
however, not *all* IPIs are to be suppressed, but long-running IPI
callbacks can still be problematic.
Add a pair of tracepoints to mark the start and end of processing a CSD IPI
callback, similar to what exists for softirq, workqueue or timer callbacks.
Signed-off-by: Leonardo Bras <leobras@redhat.com>
Tested-and-reviewed-by: Valentin Schneider <vschneid@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230615065944.188876-5-leobras@redhat.com
Diffstat (limited to 'scripts/generate_rust_analyzer.py')
0 files changed, 0 insertions, 0 deletions