Intel PT addr_filter too narrow causes TIP packet to be missing on indirect call

corvus10086 — Fri, 18 Jul 2025 02:38:57 GMT

I want to observe the TIP packets for both possible target addresses.

I set:

filter 0x5b2c46d30cb4/0x20

But in this case, the trace does not contain TIP packets indicating the call target.

However, when I move the filter earlier:

filter 0x5b2c46d30ca3/0x20

I see both TIPs correctly.

Are there any known limitations where addr_filter must include a few instructions preceding an indirect call in order for a TIP packet to be emitted?
Alternatively, are there any other conditions that could result in missing or omitted TIP packets?

Thank you!

- CPU: Intel 12th Gen Core i7-12700
- Kernel: Linux 6.8.0-60-generic

topic Intel PT addr_filter too narrow causes TIP packet to be missing on indirect call in Software Tuning, Performance Optimization & Platform Monitoring

Intel PT addr_filter too narrow causes TIP packet to be missing on indirect call