Hello, On Thu, May 30, 2024 at 7:21 PM Daniel Gregory <daniel.greg...@bytedance.com> wrote: > > Instructions from RISC-V's Zicbop extension can be used to implement the > rte_prefetch* family of functions. On modern versions of GCC (13.1.0+) > and Clang (17.0.1+), these are emitted by __builtin_prefetch() when the > extension is present. > > In order to support older compiler versions, this patchset manually > emits these instructions using inline assembly. To do this, I have added > a new flag, RTE_PREFETCH_WRITE_ARCH_DEFINED, that > (similarly to RTE_WAIT_UNTIL_EQUAL_ARCH_DEFINED) hides the generic > implementation of rte_prefetch*_write. > > I am still in the process of acquiring hardware that supports this > extension, so I haven't tested how this affects performance yet.
Let's hope you get such hardware by the next release. We will need reviews too. CC: Sachin. -- David Marchand
