On Tue, Feb 17, 2015 at 09:31:33AM -0700, Jeff Wang wrote: > Hi, > > I'm new to DPDK. > > I have gone through the user guide, set up environment, hugepages. I can > get the helloworld app work. Now, when I tried to play with the testpmd > app, I got the following issue: > > [root at localhost dpdk-1.8.0]# build/app/testpmd -c 0x2 -n1 -- -i > --nb-cores=1 --nb-ports=0x1 > > ..... > > EAL: TSC frequency is ~2594110 KHz > EAL: Master core 1 is ready (tid=e07b3840) > PMD: ENICPMD trace: rte_enic_pmd_init > EAL: PCI device 0000:02:00.0 on NUMA socket -1 > EAL: probe driver: 8086:10d3 rte_em_pmd > EAL: 0000:02:00.0 not managed by UIO driver, skipping > EAL: PCI device 0000:03:00.0 on NUMA socket -1 > EAL: probe driver: 8086:10d3 rte_em_pmd > EAL: PCI memory mapped at 0x7f06df800000 > EAL: PCI memory mapped at 0x7f06df820000 > PMD: eth_em_dev_init(): port_id 0 vendorID=0x8086 deviceID=0x10d3 > EAL: PCI device 0000:04:00.0 on NUMA socket -1 > EAL: probe driver: 8086:10d3 rte_em_pmd > EAL: 0000:04:00.0 not managed by UIO driver, skipping > EAL: PCI device 0000:05:00.0 on NUMA socket -1 > EAL: probe driver: 8086:10d3 rte_em_pmd > EAL: 0000:05:00.0 not managed by UIO driver, skipping*PANIC in main(): > Empty set of forwarding logical cores - check the core mask supplied > in the command parameters* > 5: [build/app/testpmd() [0x428ea5]] > 4: [/lib64/libc.so.6(__libc_start_main+0xf5) [0x7f06df8e2af5]] > > ..... > > It says the core mask is not right. I set it to 0x2 because my CPU > only has 2 cores. I don't quite get it. > > Can someone help me with this? And has anyone else encountered the same issue? > > Thanks!
Hi, a coremask of 2 means to use only the second core (i.e. core 1, but not core 0). Since the coremask is a bitmask, to use two cores you need to specify 0011b, or "3" decimal/hex. Regards, /Bruce
