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https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git
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0304a3b7ec
Add an example BPF action program that prints the measured latency to the tracefs buffer via bpf_printk(). A new Makefile target, "examples", is added to build the example. In addition, "sample/" subfolder is renamed to "example". If BPF skeleton support is unavailable or disabled, a warning will be displayed when building the BPF action program example. Link: https://lore.kernel.org/r/20251126144205.331954-4-tglozar@redhat.com Signed-off-by: Tomas Glozar <tglozar@redhat.com>
17 lines
413 B
C
17 lines
413 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/bpf.h>
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#include <bpf/bpf_tracing.h>
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char LICENSE[] SEC("license") = "GPL";
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struct trace_event_raw_timerlat_sample {
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unsigned long long timer_latency;
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} __attribute__((preserve_access_index));
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SEC("tp/timerlat_action")
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int action_handler(struct trace_event_raw_timerlat_sample *tp_args)
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{
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bpf_printk("Latency: %lld\n", tp_args->timer_latency);
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return 0;
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}
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