On Wed, Jun 3, 2020 at 3:48 AM Slava Ovsiienko <viachesl...@mellanox.com> wrote: > > > From: PATRICK KEROULAS <patrick.kerou...@radio-canada.ca> > > * rdma-code, libibverbs-dev: 28.0 > > * NIC Part Number: MCX516A-CDA_Ax > > * ConnectX-5 Ex EN > > * FW: 16.25.1020 > > It looks like outdated firmware, please: > - update the firmware - at least 16.27.2008 is GA. I would recommend to > install OFED - it updates the FW > - make sure the UCTX_EN option in FW configuration is set to "true"
Hello Slava, I managed to query device_frequency_khz by simply setting UCTX_EN=1, convert the mbuf->timestamp to nsec and write a pcap. However, the accuracy is quite disappointing, compared to libvma or even SW TS. The freq value looks constant (=78125kHz). Correct me if I'm wrong, a ptp client is supposed to continuously adjust some kind of VCO on the NIC. And even setting a crazy value through /dev/ptp interface manually doesn't affect device_frequency_khz. Please could you clarify? This leads me back to mlx5dv_clock_info->nsec. If this is a valid method, I think the only missing piece is to access it from the secondary process, which implies to share ibv_context. Best Regards, PK
