> On Mar 10, 2017, at 9:35 PM, Kai Zhang <[email protected]> wrote: > > Hi, there > > I am using DPDK-16.11 on XL710 40GbE NIC. OS: CentOS 7.3.1611 with Linux > kernel version 3.8.0-30. > > I have a master process and a secondary process. When I run the secondary > process with less than or equal to 4 cores, it works correctly. Such as: > sudo ./program -l 4,5,6,7 -n 4 --proc-type=secondary > sudo ./program -c 0x0f -n 4 --proc-type=secondary > > However, there will be error in the rte_eal_init if I assign more than 4 > cores. > sudo ./program -l 0,1,2,3,4 -n 4 --proc-type=secondary > sudo ./program -c 0x1f -n 4 --proc-type=secondary > > EAL: Cannot mmap device resource file > /sys/bus/pci/devices/0000:02:00.0/resource0 to address: 0x7fff65bfc000 > EAL: Error - exiting with code: 1 > Cause: Requested device 0000:02:00.0 cannot be used
I assume you have at least 8 cores. Have you tried -l 1-5 on the secondary process. You did not show the primary process command line, but the if you use 1-5 then you can only give primary process -l 6-7 or two cores. It is always a reasonable thing is to leave core zero for linux to use. Also it could be you ran out of memory or hugepages you allocated to the system. > > Anyone knows why this happens? > > Thanks a lot, > Kai Zhang Regards, Keith
