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| author | David Vernet <[email protected]> | 2023-10-04 16:23:38 +0000 |
|---|---|---|
| committer | Daniel Borkmann <[email protected]> | 2023-10-09 14:28:49 +0000 |
| commit | d6247ecb6c1e17d7a33317090627f5bfe563cbb2 (patch) | |
| tree | 44ab30986641d6e821620f08a2edf24fbbcf4aac /tools/testing/selftests/bpf/prog_tests/timer.c | |
| parent | bpf: Annotate struct bpf_stack_map with __counted_by (diff) | |
| download | kernel-d6247ecb6c1e17d7a33317090627f5bfe563cbb2.tar.gz kernel-d6247ecb6c1e17d7a33317090627f5bfe563cbb2.zip | |
bpf: Add ability to pin bpf timer to calling CPU
BPF supports creating high resolution timers using bpf_timer_* helper
functions. Currently, only the BPF_F_TIMER_ABS flag is supported, which
specifies that the timeout should be interpreted as absolute time. It
would also be useful to be able to pin that timer to a core. For
example, if you wanted to make a subset of cores run without timer
interrupts, and only have the timer be invoked on a single core.
This patch adds support for this with a new BPF_F_TIMER_CPU_PIN flag.
When specified, the HRTIMER_MODE_PINNED flag is passed to
hrtimer_start(). A subsequent patch will update selftests to validate.
Signed-off-by: David Vernet <[email protected]>
Signed-off-by: Daniel Borkmann <[email protected]>
Acked-by: Song Liu <[email protected]>
Acked-by: Hou Tao <[email protected]>
Link: https://lore.kernel.org/bpf/[email protected]
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/timer.c')
0 files changed, 0 insertions, 0 deletions