Re: [PATCH v5 13/17] perf: Support deferred user callchains
From: Steven Rostedt <rostedt@goodmis.org>
Date: 2025-05-08 18:54:29
Also in:
linux-perf-users, linux-toolchains, lkml
On Thu, 8 May 2025 14:49:59 -0400 Mathieu Desnoyers [off-list ref] wrote:
AFAIR, the cookie method generates the cookie by combining the cpu number with a per-cpu count. This ensures that there are not two cookies emitted at the same time from two CPUs that have the same value by accident. How would the timestamp method prevent this ?
Do we care? It only needs to be unique per pid doesn't it? -- Steve