>-----Original Message----- >From: Honnappa Nagarahalli [mailto:honnappa.nagaraha...@arm.com] >Sent: Tuesday, November 13, 2018 9:17 AM >To: Thomas Monjalon <tho...@monjalon.net>; Richardson, Bruce ><bruce.richard...@intel.com>; Wang, Yipeng1 ><yipeng1.w...@intel.com> >Cc: sta...@dpdk.org; dev@dpdk.org; nd <n...@arm.com>; nd <n...@arm.com> >Subject: RE: [dpdk-stable] [dpdk-dev] [PATCH v2 2/4] hash: add local cache for >TSX region >> > > /* Check extra flags field to check extra options. */ >> > > - if (params->extra_flag & >> > > RTE_HASH_EXTRA_FLAGS_TRANS_MEM_SUPPORT) >> > > + if (params->extra_flag & >> > > RTE_HASH_EXTRA_FLAGS_TRANS_MEM_SUPPORT) { >> > > + use_local_cache = 1; >> > Do you see the issue even in the case of single writer? Enabling this flag >> creates local caches on all the data plane cores. This increases the memory >> usage for the single writer use case. Then there is 'writers on the control >> plane' use case, the requirement on hash_add rate is comparatively lower >> when compared to 'writers on the data plane'. The writers also are not pinned >> to any core as well. In this use case, I am not sure how much having a local >> cache matters. >> > >> > Enabling this flag effectively changes the free slot allocation from a >> > ring to a >> stack data structure. Does it indicate that for single writer use case with >> TSX, >> the free slot (global) data structure should be a stack (rather than a ring)? >> >> Is it blocking this patchset from entering in 18.11? >> If I understand well, there are some fixes for 18.11.
[Wang, Yipeng] Hi Thomas, please go ahead merge the other commits without this one since Honnapa's concern. I will talk with Honnappa separately on a better way to do this. Thanks! >> >I am fine with the other fixes in this patchset
