> -----Original Message----- > From: Morten Brørup <m...@smartsharesystems.com> > Sent: Thursday, 19 June 2025 15:57 > To: Stephen Hemminger <step...@networkplumber.org>; Shani Peretz > <shper...@nvidia.com> > Cc: dev@dpdk.org > Subject: RE: [RFC PATCH 0/5] Introduce mempool object new debug > capabilities > > External email: Use caution opening links or attachments > > > > From: Stephen Hemminger [mailto:step...@networkplumber.org] > > Sent: Monday, 16 June 2025 17.30 > > > > On Mon, 16 Jun 2025 10:29:05 +0300 > > Shani Peretz <shper...@nvidia.com> wrote: > > > > > This feature is designed to monitor the lifecycle of mempool objects > > > as they move between the application and the PMD. > > > > > > It will allow us to track the operations and transitions of each > > > mempool object throughout the system, helping in debugging and > > > understanding objects > > flow. > > > > > > The implementation include several key components: > > > 1. Added a bitmap to mempool's header (rte_mempool_objhdr) > > > that represent the operations history. > > > 2. Added functions that allow marking operations on an > > > mempool objects. > > > 3. Dumps the history to a file or the console > > > (rte_mempool_objects_dump). > > > 4. Added python script that can parse, analyze the data and > > > present it in an human readable format. > > > 5. Added compilation flag to enable the feature. > > > > > > Shani Peretz (5): > > > mempool: record mempool objects operations history > > > drivers: add mempool history compilation flag > > > net/mlx5: mark an operation in mempool object's history > > > app/testpmd: add testpmd command to dump mempool history > > > usertool: add a script to parse mempool history dump > > > > > > > Could this not already be done with tracing infrastructure? > > I agree with Stephen on this. > > And, if you plan to use this for performance measurements, you can use the > coming PMU trace to trace the objects' movements between CPU caches and > RAM, so you can discriminate between hot and cold objects.
We want to track when the transition of objects between the app and the PMD. So I don't know if PMU library is helpful in this case, isn't it?
