On 7/15/2026 4:08 AM, Morten Brørup wrote: > Hi Kishore, > > For your testing purposes, please follow the guidance provided to Wisam Jaddo: > https://inbox.dpdk.org/dev/[email protected]/
We need to recompile in this case. We should try to avoid recompilation. I think it is necessary to adjust RTE_MEMPOOL_CACHE_MAX_SIZE to 768 as a default configuration. Thanks > > Thank you for testing! > > Venlig hilsen / Kind regards, > -Morten Brørup > > From: Kishore Padmanabha [mailto:[email protected]] > Sent: Tuesday, 14 July 2026 18.49 > To: Thomas Monjalon; Morten Brørup > Cc: [email protected] > Subject: mempool cache change > > Hi Thomas, > > The recent change done as part of BUG ID: 1027, with commit id > https://git.dpdk.org/dpdk/commit/?id=f5e1310f16e0909e7e7f71807123644c63b23cba > Is causing performance drop for the bnxt NIC in 26.07 release. > > The smaller, shallower cache increases the miss rate, causing refills to hit > the shared ring more frequently. > In the old code, the cache only touched the shared ring when it climbed past > 768 instead of 512. That extra 256 elements of headroom allowed significantly > more frees to remain local. > > Could we make the change in config/rte_config.h for > RTE_MEMPOOL_CACHE_MAX_SIZE to be 768 instead of 512. Since we use > –mbcache=512 as argument for the performance tests. > > Thanks, > Kishore > >
