Re: [dpdk-users] MLX5: Using packet send scheduling / packet pacing
Hi, Carsten To use packet pacing capability: - ConnectX-6DX or above is required - the NV settings should be configured (set timestamp to real-time UTC) With best regards, Slava > -Original Message- > From: Thomas Monjalon > Sent: Friday, January 29, 2021 18:50 > To: Carsten Andrich > Cc: users@dpdk.org; Slava Ovsiienko > Subject: Re: [dpdk-users] MLX5: Using packet send scheduling / packet pacing > > 29/01/2021 17:30, Carsten Andrich: > > Hello everyone, > > > > I'm trying to use packet send scheduling [1] with DPDK 20.11 and the > > MLX5 PMD (NIC: ConnectX-5 MCX516A-CDAT). This patch contains some > > additional information on this feature also know as packet pacing [2]. > > > > According to MLX5's docs, packet pacing requires the "tx_pp" parameter > > [3, CTRL+F: "tx_pp"]. However, when firing up testpmd with that > > parameter, it fails as follows: > > > > > # dpdk-testpmd -a 81:00.0,tx_pp=500 -- -i ... > > > EAL: Probe PCI driver: mlx5_pci (15b3:1019) device: :81:00.0 > > > (socket 0) > > > mlx5_pci: WQE rate mode is required for packet pacing > > > mlx5_pci: probe of PCI device :81:00.0 aborted after > > > encountering an error: No such device > > > common_mlx5: Failed to load driver = mlx5_pci. > > > > > > EAL: Requested device :81:00.0 cannot be used > > The error message originates here [4] and is caused by what to me > > appears to be a value read from the NIC [5]. Unfortunately, that > > leaves me clueless on how to activate the required "WQE rate mode". > > According to the output of ibv_devinfo, my NIC does support packet pacing: > > > > > # ibv_devinfo -v 81:00.0 > > > ... > > > packet_pacing_caps: > > > qp_rate_limit_min: 1kbps > > > qp_rate_limit_max: 1kbps > > > supported_qp: > > > SUPPORT_RAW_PACKET > > I'd be grateful for any information on how to get packet pacing up and > > running. Am I just missing another required option (which is not given > > in the docs) or does my NIC lack packet pacing support? > > > > Thank you very much in advance. > > > > Best regards, > > Carsten > > > > [1] > > > https://doc.dpdk.org/api/rte__ethdev_8h.html#a990d8351447a710628cbb24 > a > > 28d3252d [2] https://patches.dpdk.org/patch/73742/ > > [3] https://doc.dpdk.org/guides/nics/mlx5.html#run-time-configuration > > [4] > > http://code.dpdk.org/dpdk/v20.11/source/drivers/net/mlx5/linux/mlx5_os > > .c#L1278 > > [5] > > > http://code.dpdk.org/dpdk/v20.11/source/drivers/common/mlx5/mlx5_devx > _ > > cmds.c#L748 > > > > > > > >
Re: [dpdk-users] MLX5: Using packet send scheduling / packet pacing
+Cc Slava 29/01/2021 17:30, Carsten Andrich: > Hello everyone, > > I'm trying to use packet send scheduling [1] with DPDK 20.11 and the > MLX5 PMD (NIC: ConnectX-5 MCX516A-CDAT). This patch contains some > additional information on this feature also know as packet pacing [2]. > > According to MLX5's docs, packet pacing requires the "tx_pp" parameter > [3, CTRL+F: "tx_pp"]. However, when firing up testpmd with that > parameter, it fails as follows: > > > # dpdk-testpmd -a 81:00.0,tx_pp=500 -- -i > > ... > > EAL: Probe PCI driver: mlx5_pci (15b3:1019) device: :81:00.0 (socket 0) > > mlx5_pci: WQE rate mode is required for packet pacing > > mlx5_pci: probe of PCI device :81:00.0 aborted after encountering an > > error: No such device > > common_mlx5: Failed to load driver = mlx5_pci. > > > > EAL: Requested device :81:00.0 cannot be used > The error message originates here [4] and is caused by what to me > appears to be a value read from the NIC [5]. Unfortunately, that leaves > me clueless on how to activate the required "WQE rate mode". According > to the output of ibv_devinfo, my NIC does support packet pacing: > > > # ibv_devinfo -v 81:00.0 > > ... > > packet_pacing_caps: > > qp_rate_limit_min: 1kbps > > qp_rate_limit_max: 1kbps > > supported_qp: > > SUPPORT_RAW_PACKET > I'd be grateful for any information on how to get packet pacing up and > running. Am I just missing another required option (which is not given > in the docs) or does my NIC lack packet pacing support? > > Thank you very much in advance. > > Best regards, > Carsten > > [1] > https://doc.dpdk.org/api/rte__ethdev_8h.html#a990d8351447a710628cbb24a28d3252d > [2] https://patches.dpdk.org/patch/73742/ > [3] https://doc.dpdk.org/guides/nics/mlx5.html#run-time-configuration > [4] > http://code.dpdk.org/dpdk/v20.11/source/drivers/net/mlx5/linux/mlx5_os.c#L1278 > [5] > http://code.dpdk.org/dpdk/v20.11/source/drivers/common/mlx5/mlx5_devx_cmds.c#L748 > >
[dpdk-users] MLX5: Using packet send scheduling / packet pacing
Hello everyone, I'm trying to use packet send scheduling [1] with DPDK 20.11 and the MLX5 PMD (NIC: ConnectX-5 MCX516A-CDAT). This patch contains some additional information on this feature also know as packet pacing [2]. According to MLX5's docs, packet pacing requires the "tx_pp" parameter [3, CTRL+F: "tx_pp"]. However, when firing up testpmd with that parameter, it fails as follows: # dpdk-testpmd -a 81:00.0,tx_pp=500 -- -i ... EAL: Probe PCI driver: mlx5_pci (15b3:1019) device: :81:00.0 (socket 0) mlx5_pci: WQE rate mode is required for packet pacing mlx5_pci: probe of PCI device :81:00.0 aborted after encountering an error: No such device common_mlx5: Failed to load driver = mlx5_pci. EAL: Requested device :81:00.0 cannot be used The error message originates here [4] and is caused by what to me appears to be a value read from the NIC [5]. Unfortunately, that leaves me clueless on how to activate the required "WQE rate mode". According to the output of ibv_devinfo, my NIC does support packet pacing: # ibv_devinfo -v 81:00.0 ... packet_pacing_caps: qp_rate_limit_min: 1kbps qp_rate_limit_max: 1kbps supported_qp: SUPPORT_RAW_PACKET I'd be grateful for any information on how to get packet pacing up and running. Am I just missing another required option (which is not given in the docs) or does my NIC lack packet pacing support? Thank you very much in advance. Best regards, Carsten [1] https://doc.dpdk.org/api/rte__ethdev_8h.html#a990d8351447a710628cbb24a28d3252d [2] https://patches.dpdk.org/patch/73742/ [3] https://doc.dpdk.org/guides/nics/mlx5.html#run-time-configuration [4] http://code.dpdk.org/dpdk/v20.11/source/drivers/net/mlx5/linux/mlx5_os.c#L1278 [5] http://code.dpdk.org/dpdk/v20.11/source/drivers/common/mlx5/mlx5_devx_cmds.c#L748
[dpdk-users] Is it possible to receive scatter gather packet in the chip, from another chip which is not DPDK, and did not enable scatter/gathere mode
Hello, May I ask a question, we need to receive in XEON, for packet from another chip, which don't have DPDK, just eth packets, can we also use scatter/gather to receive it? Or scatter/gather requires send side(another chip) must enable scatter/gather mode? Thanks in advance! Dave
