Re: [PATCH v2 4/5] perf/record: add support for sampling skid ip

2017-11-06 Thread Andi Kleen
On Thu, Nov 02, 2017 at 11:15:58AM -0700, Stephane Eranian wrote: > This patch adds a new --skid-ip option to perf record > to capture the unmodified interrupted instruction pointer in > each sample. With this option, the kernel captures both the > ip and skid ip. Unless precise mode is enabled bot

[PATCH v2 4/5] perf/record: add support for sampling skid ip

2017-11-02 Thread Stephane Eranian
This patch adds a new --skid-ip option to perf record to capture the unmodified interrupted instruction pointer in each sample. With this option, the kernel captures both the ip and skid ip. Unless precise mode is enabled both ip are the same. They may be different in precise mode depending on the