So I have been up and running for about 10 days. I was also curious how many interrupts my dongle
causes/sec when ADS-B msg rate is stated to be about 90-100 msgs/sec received. Looking at
/proc/interrupts, and grep’ing for ‘usb1’, I seem to see 300 interrupts/sec!!! This surprised me, may be
looking at wrong interrupt? ( I checked the count at 30 sec intervals and is steadily increasing at 293.3
interrupts/sec!!) This seems too high (if I am looking at dongle interrupts.)
rk3318-box> cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
9: 0 0 0 0 GICv2 25 Level vgic
11: 17378034 16550540 28312546 42642606 GICv2 30 Level arch_timer
12: 0 0 0 0 GICv2 27 Level kvm guest vtimer
18: 0 0 0 0 GICv2 132 Level arm-pmu
19: 0 0 0 0 GICv2 133 Level arm-pmu
20: 0 0 0 0 GICv2 134 Level arm-pmu
21: 0 0 0 0 GICv2 135 Level arm-pmu
22: 0 0 0 0 GICv2 94 Level rockchip_usb2phy
23: 1814 0 0 0 GICv2 32 Level ff1f0000.dma-controller
24: 0 0 0 0 GICv2 33 Level ff1f0000.dma-controller
26: 505 0 0 0 GICv2 89 Level ttyS2
27: 0 0 0 0 GICv2 128 Level ff330200.iommu
28: 0 0 0 0 GICv2 130 Level ff340800.iommu
29: 0 0 0 0 GICv2 43 Level ff350800.iommu
30: 0 0 0 0 GICv2 106 Level ff360480.iommu
31: 0 0 0 0 GICv2 64 Level ff373f00.iommu, ff370000.vop
32: 0 0 0 0 GICv2 63 Level ff3a0800.iommu
33: 0 0 0 0 GICv2 99 Level xhci-hcd:usb2
34: 123387733 0 0 0 GICv2 55 Level ff580000.usb, dwc2_hsotg:usb1 # << this one?
35: 0 0 0 0 GICv2 48 Level ehci_hcd:usb4
36: 0 0 0 0 GICv2 49 Level ohci_hcd:usb5
37: 0 0 0 0 GICv2 90 Level rockchip_thermal
38: 0 0 0 0 GICv2 72 Edge ff1a0000.watchdog
39: 0 0 0 0 GICv2 44 Level dw-mci
40: 25286229 0 0 0 GICv2 45 Level dw-mci
41: 283184 0 0 0 GICv2 46 Level dw-mci
42: 0 0 0 0 GICv2 36 Level dw-mci
43: 4047877 0 0 0 GICv2 112 Level ff280000.adc
44: 0 0 0 0 rockchip_gpio_irq 5 Edge ff500000.mmc cd
45: 0 0 0 0 rockchip_gpio_irq 1 Edge ff5f0000.dwmmc cd
46: 0 0 0 0 GICv2 115 Level ff430000.phy
47: 0 0 0 0 GICv2 67 Level ff3c0000.hdmi, dw-hdmi-cec
48: 0 0 0 0 GICv2 119 Level gpmmu
49: 0 0 0 0 GICv2 121 Level ppmmu0
50: 0 0 0 0 GICv2 124 Level ppmmu1
51: 2104140 0 0 0 GICv2 122 Level gp
52: 0 0 0 0 GICv2 120 Level pp0
53: 0 0 0 0 GICv2 123 Level pp1
54: 1683299 0 0 0 GICv2 125 Level pp_bcast
55: 0 0 0 0 GICv2 53 Level eth0
56: 26 0 0 0 rockchip_gpio_irq 2 Edge gpio-ir-recv-irq
57: 0 0 0 0 GICv2 65 Level ff390000.rga
58: 0 0 0 0 GICv2 41 Level ff350000.video-codec
59: 0 0 0 0 GICv2 39 Level ff360000.video-codec
IPI0: 26760 17685 822329 1677977 Rescheduling interrupts
IPI1: 19726757 72649878 28341230 21879401 Function call interrupts
IPI2: 0 0 0 0 CPU stop interrupts
IPI3: 0 0 0 0 CPU stop (for crash dump) interrupts
IPI4: 0 0 0 0 Timer broadcast interrupts
IPI5: 157979 197797 79956 69027 IRQ work interrupts
IPI6: 0 0 0 0 CPU wake-up interrupts
Err: 0
rk3318-box> lsusb
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 0bda:2838 Realtek Semiconductor Corp. RTL2838 DVB-T
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub