[dpdk-dev] RTE_EAL on single core CPUs

[Marc Sune <marc.sune@bisdn.de>]

Dear all,

I was preparing a development machine (kvm - qemu) with a single core, 
and stumbled with what appears to be a limitation with EAL [1]. The VM 
is setup emulating a SandyBridge CPU but with a single CPU and running 
1.6.0 branch HEAD (perhaps this is the problem?¿).

I was also interested in this particular setup, because we haven't yet 
tried our application with some Atom equipment we have here, but we need 
to make it run also there.

Any ideas? I am probably missing something really fundamental here.

Thank you and regards
marc

[1]

marc@dpdk:~/dpdk/examples/l2fwd/build$ sudo ./l2fwd  -c 1 -n 1 -- -p=0xf
EAL: Detected lcore 0 as core 0 on socket 0
EAL: Skip lcore 1 (not detected)
EAL: Skip lcore 2 (not detected)
EAL: Skip lcore 3 (not detected)
EAL: Skip lcore 4 (not detected)
EAL: Skip lcore 5 (not detected)
EAL: Skip lcore 6 (not detected)
EAL: Skip lcore 7 (not detected)
EAL: Skip lcore 8 (not detected)
EAL: Skip lcore 9 (not detected)
EAL: Skip lcore 10 (not detected)
EAL: Skip lcore 11 (not detected)
EAL: Skip lcore 12 (not detected)
EAL: Skip lcore 13 (not detected)
EAL: Skip lcore 14 (not detected)
EAL: Skip lcore 15 (not detected)
EAL: Skip lcore 16 (not detected)
EAL: Skip lcore 17 (not detected)
EAL: Skip lcore 18 (not detected)
EAL: Skip lcore 19 (not detected)
EAL: Skip lcore 20 (not detected)
EAL: Skip lcore 21 (not detected)
EAL: Skip lcore 22 (not detected)
EAL: Skip lcore 23 (not detected)
EAL: Skip lcore 24 (not detected)
EAL: Skip lcore 25 (not detected)
EAL: Skip lcore 26 (not detected)
EAL: Skip lcore 27 (not detected)
EAL: Skip lcore 28 (not detected)
EAL: Skip lcore 29 (not detected)
EAL: Skip lcore 30 (not detected)
EAL: Skip lcore 31 (not detected)
EAL: Skip lcore 32 (not detected)
EAL: Skip lcore 33 (not detected)
EAL: Skip lcore 34 (not detected)
EAL: Skip lcore 35 (not detected)
EAL: Skip lcore 36 (not detected)
EAL: Skip lcore 37 (not detected)
EAL: Skip lcore 38 (not detected)
EAL: Skip lcore 39 (not detected)
EAL: Skip lcore 40 (not detected)
EAL: Skip lcore 41 (not detected)
EAL: Skip lcore 42 (not detected)
EAL: Skip lcore 43 (not detected)
EAL: Skip lcore 44 (not detected)
EAL: Skip lcore 45 (not detected)
EAL: Skip lcore 46 (not detected)
EAL: Skip lcore 47 (not detected)
EAL: Skip lcore 48 (not detected)
EAL: Skip lcore 49 (not detected)
EAL: Skip lcore 50 (not detected)
EAL: Skip lcore 51 (not detected)
EAL: Skip lcore 52 (not detected)
EAL: Skip lcore 53 (not detected)
EAL: Skip lcore 54 (not detected)
EAL: Skip lcore 55 (not detected)
EAL: Skip lcore 56 (not detected)
EAL: Skip lcore 57 (not detected)
EAL: Skip lcore 58 (not detected)
EAL: Skip lcore 59 (not detected)
EAL: Skip lcore 60 (not detected)
EAL: Skip lcore 61 (not detected)
EAL: Skip lcore 62 (not detected)
EAL: Skip lcore 63 (not detected)
EAL: Setting up memory...
EAL: Ask a virtual area of 0x5c00000 bytes
EAL: Virtual area found at 0x7fbfaf600000 (size = 0x5c00000)
EAL: Ask a virtual area of 0x1800000 bytes
EAL: Virtual area found at 0x7fbfadc00000 (size = 0x1800000)
EAL: Ask a virtual area of 0x600000 bytes
EAL: Virtual area found at 0x7fbfad400000 (size = 0x600000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0x7fbfad000000 (size = 0x200000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0x7fbfacc00000 (size = 0x200000)
EAL: Ask a virtual area of 0x200000 bytes
EAL: Virtual area found at 0x7fbfac800000 (size = 0x200000)
EAL: Requesting 64 pages of size 2MB from socket 0
EAL: TSC frequency is ~2494382 KHz
EAL: WARNING: cpu flags constant_tsc=yes nonstop_tsc=no -> using 
unreliable clock cycles !
EAL: Master core 0 is ready (tid=b6129840)
EAL: PCI device 0000:00:06.0 on NUMA socket -1
EAL:   probe driver: 8086:100e rte_em_pmd
EAL:   PCI memory mapped at 0x7fbfb60d3000
EAL: PCI device 0000:00:07.0 on NUMA socket -1
EAL:   probe driver: 8086:100e rte_em_pmd
EAL:   PCI memory mapped at 0x7fbfb60b3000
EAL: PCI device 0000:00:08.0 on NUMA socket -1
EAL:   probe driver: 8086:100e rte_em_pmd
EAL:   PCI memory mapped at 0x7fbfb6051000
EAL: PCI device 0000:00:09.0 on NUMA socket -1
EAL:   probe driver: 8086:100e rte_em_pmd
EAL:   PCI memory mapped at 0x7fbfb6031000
Lcore 0: RX port 0
EAL: Error - exiting with code: 1
   Cause: Not enough cores
marc@dpdk:~/dpdk/examples/l2fwd/build$