>>> Issue #1: VPP crashes when scales to multiple worker cores/threads. [...] >>> We guess VPP buffer metadata has been corrupted in the case of multiple >>> worker threads using VPP release version
>> BG: do you reproduce the issue on both x86 and ARM? Or only on ARM? I’m >> especially thinking about difference in memory coherency that could bite >> us here… > [Honnappa] On Arm, the barriers for working with MMIO are different than > the ones used for normal shared memory. Currently, in VPP, this > distinction does not exist (please correct me if I am wrong). Yes, I was thinking about something along that line. Currently we use CLIB_MEMORY_STORE_BARRIER() defined as __builtin_ia32_sfence() on x86 and __sync_synchronize() on ARM. __sync_synchronize() should be a full memory barrier but is it enough for MMIO on ARM? Best ben
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