I installed DPDK, and finally it gives no error messages. On the other
hand, when i use ixgbe driver with (my NIC is X520-DA2) 200 MHz bandwidth,
no samples are dropped, but when i switch to vfio-pci and "use_dpdk=1" it
starts to drop samples at 200 MHz bandwidth. I cant transmit at 200 MHz
with a single channel with or without dpdk (it underflows). My uhd.conf and
cpufreq-info are given below. I also isolated cores 2,3 and 4. Any idea why
this happens?
[use_dpdk=1]
dpdk_mtu=9000
dpdk_driver=/usr/local/lib/x86_64-linux-gnu/dpdk/pmds-18.11
dpdk_corelist=2,3,4
;dpdk_num_mbufs=4096
;dpdk_mbuf_cache_size=64
[dpdk_mac=xx:xx:xx:xx:xx:a0]
dpdk_lcore = 3
dpdk_ipv4 = 192.168.10.1/24
;dpdk_num_desc=4096
[dpdk_mac=xx:xx:xx:xx:xx:a1]
dpdk_lcore = 4
dpdk_ipv4 = 192.168.20.1/24
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 4294.55 ms.
hardware limits: 800 MHz - 4.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 4.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 4.35 GHz.
analyzing CPU 1:
driver: intel_pstate
CPUs which run at the same hardware frequency: 1
CPUs which need to have their frequency coordinated by software: 1
maximum transition latency: 4294.55 ms.
hardware limits: 800 MHz - 4.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 4.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 4.36 GHz.
analyzing CPU 2:
driver: intel_pstate
CPUs which run at the same hardware frequency: 2
CPUs which need to have their frequency coordinated by software: 2
maximum transition latency: 4294.55 ms.
hardware limits: 800 MHz - 4.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 4.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 4.45 GHz.
analyzing CPU 3:
driver: intel_pstate
CPUs which run at the same hardware frequency: 3
CPUs which need to have their frequency coordinated by software: 3
maximum transition latency: 4294.55 ms.
hardware limits: 800 MHz - 4.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 4.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 4.41 GHz.
analyzing CPU 4:
driver: intel_pstate
CPUs which run at the same hardware frequency: 4
CPUs which need to have their frequency coordinated by software: 4
maximum transition latency: 4294.55 ms.
hardware limits: 800 MHz - 4.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 4.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 4.38 GHz.
analyzing CPU 5:
driver: intel_pstate
CPUs which run at the same hardware frequency: 5
CPUs which need to have their frequency coordinated by software: 5
maximum transition latency: 4294.55 ms.
hardware limits: 800 MHz - 4.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 4.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 4.40 GHz.
analyzing CPU 6:
driver: intel_pstate
CPUs which run at the same hardware frequency: 6
CPUs which need to have their frequency coordinated by software: 6
maximum transition latency: 4294.55 ms.
hardware limits: 800 MHz - 4.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 4.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 4.35 GHz.
analyzing CPU 7:
driver: intel_pstate
CPUs which run at the same hardware frequency: 7
CPUs which need to have their frequency coordinated by software: 7
maximum transition latency: 4294.55 ms.
hardware limits: 800 MHz - 4.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 4.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 4.36 GHz.
analyzing CPU 8:
driver: intel_pstate
CPUs which run at the same hardware frequency: 8
CPUs which need to have their frequency coordinated by software: 8
maximum transition latency: 4294.55 ms.
hardware limits: 800 MHz - 4.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 4.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 4.36 GHz.
analyzing CPU 9:
driver: intel_pstate
CPUs which run at the same hardware frequency: 9
CPUs which need to have their frequency coordinated by software: 9
maximum transition latency: 4294.55 ms.
hardware limits: 800 MHz - 4.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 4.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 4.30 GHz.
analyzing CPU 10:
driver: intel_pstate
CPUs which run at the same hardware frequency: 10
CPUs which need to have their frequency coordinated by software: 10
maximum transition latency: 4294.55 ms.
hardware limits: 800 MHz - 4.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 4.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 4.39 GHz.
analyzing CPU 11:
driver: intel_pstate
CPUs which run at the same hardware frequency: 11
CPUs which need to have their frequency coordinated by software: 11
maximum transition latency: 4294.55 ms.
hardware limits: 800 MHz - 4.60 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 800 MHz and 4.60 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 4.35 GHz.
Best Regards
Berkay S.
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