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| author | Martin KaFai Lau <kafai@fb.com> | 2022-03-09 12:04:56 +0300 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-03-11 00:57:05 +0300 |
| commit | 539de9328e3ab444efe51ddc7416ce2a3f0f23b2 (patch) | |
| tree | f072bd14ec814bc1f408d924b7c138a753c215be /tools/perf/scripts/python/syscall-counts.py | |
| parent | 3b5d4ddf8fe1f60082513f94bae586ac80188a03 (diff) | |
| download | linux-539de9328e3ab444efe51ddc7416ce2a3f0f23b2.tar.xz | |
bpf: Simplify insn rewrite on BPF_READ __sk_buff->tstamp
The skb->tc_at_ingress and skb->mono_delivery_time are at the same
byte offset. Thus, only one BPF_LDX_MEM(BPF_B) is needed
and both bits can be tested together.
/* BPF_READ: a = __sk_buff->tstamp */
if (skb->tc_at_ingress && skb->mono_delivery_time)
a = 0;
else
a = skb->tstamp;
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220309090456.3711530-1-kafai@fb.com
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions