> From: users [mailto:[email protected]] On Behalf Of Kai Zhang > Subject: Re: [dpdk-users] Issue with more Cores assigned: Cannot mmap device > resource > file > > Yes, my application is somewhat special and should run with the > primary/secondary mode. I will search for the way to turn of the random > page mapping and try it.
You're searching for ASLR, or Address Space Layout Randomization. Some useful links regarding ASLR, DPDK and Linux; http://dpdk.readthedocs.io/en/v16.04/prog_guide/multi_proc_support.html#multi-process-limitations http://askubuntu.com/questions/318315/how-can-i-temporarily-disable-aslr-address-space-layout-randomization http://dpdk.org/ml/archives/dev/2015-June/019364.html Please note that ASLR is a security feature of the OS, think twice before disabling it. Hope that helps, -Harry > Thanks for your help :) > > Regards, > Kai > > On Mon, Mar 13, 2017 at 3:24 AM, Wiles, Keith <[email protected]> wrote: > > > > > > On Mar 12, 2017, at 6:39 PM, Kai Zhang <[email protected]> wrote: > > > > > > > > > Your application may be attaching to the same port for each core. > > Normally this means the each core could be allocating memory and the 4th > > core just goes over the amount of memory you have reserved. > > > > > > I don't think so. Because the error is in the rte_eal_init(), which is > > executed in the first line of the main() function. At the time, the other > > threads are not even launched. > > > > > > Is it possible to consider this as a bug in DPDK? > > > > One more thing, I run Pktgen as two processes all of the time. The big > > difference is I do not run in primary and secondary modes. I run two > > different instances of pktgen at the same time without seeing this type > > problem. If the failure is associated with primary/secondary application > > model, then it could be a bug in that code as a lot of syncing up between > > the two processes needs to be done because of memory/device sharing. One > > problem with P/S applications is memory needs to be mapped at the same > > address between the processes and Linux has the Random memory mapping > > builtin for security reasons. I forget the name of the mode in Linux to > > turn off the random page mapping and google is not work for me ATM. > > > > Does your application require running as a primary/secondary application? > > > > > > > > Regards, > > > Kai > > > > > > > > > > > > > > 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 > > > > > > > > Regards, > > > > Kai > > > > > > > > On Sun, Mar 12, 2017 at 11:21 AM, Kai Zhang <[email protected]> wrote: > > > > > > > > Command line: > > > > primary: sudo ./primary -l 0,1,2,3 -n 4 --proc-type=primary > > > > secondary: sudo ./secondary -l 4,5,6,7,8 -n 4 --proc-type=secondary > > > > > > > > The configurations are as follows: > > > > A) 1 x Intel E5-2650 v4, 12 cores [UMA], XL710 40GbE, bind > > 02:00.0, 2048 x 4k huge page > > > > 02:00.0 Ethernet controller: Intel Corporation Ethernet Controller > > XL710 for 40GbE QSFP+ (rev 02) [<<- Only bind this one] > > > > 02:00.1 Ethernet controller: Intel Corporation Ethernet Controller > > XL710 for 40GbE QSFP+ (rev 02) > > > > 05:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network > > Connection (rev 03) > > > > 06:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network > > Connection (rev 03) > > > > Socket 0 > > > > -------- > > > > Core 0 [0, 12] > > > > Core 1 [1, 13] > > > > Core 2 [2, 14] > > > > Core 3 [3, 15] > > > > Core 4 [4, 16] > > > > Core 5 [5, 17] > > > > Core 8 [6, 18] > > > > Core 9 [7, 19] > > > > Core 10 [8, 20] > > > > Core 11 [9, 21] > > > > Core 12 [10, 22] > > > > Core 13 [11, 23] > > > > > > > > B) 2 x Intel E5-2640 v4, 10 cores [NUMA], No Port Bind, 2048 x > > 4k huge page > > > > 05:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network > > Connection (rev 03) > > > > 06:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network > > Connection (rev 03) > > > > Socket 0 Socket 1 > > > > -------- -------- > > > > Core 0 [0, 20] [10, 30] > > > > Core 1 [1, 21] [11, 31] > > > > Core 2 [2, 22] [12, 32] > > > > Core 3 [3, 23] [13, 33] > > > > Core 4 [4, 24] [14, 34] > > > > Core 8 [5, 25] [15, 35] > > > > Core 9 [6, 26] [16, 36] > > > > Core 10 [7, 27] [17, 37] > > > > Core 11 [8, 28] [18, 38] > > > > Core 12 [9, 29] [19, 39] > > > > > > > > Ah, as machine B does not have a 40GbE, I did not bind any NIC and run > > my program with locally generated packets. But I am using other DPDK > > features, such as memory sharing and message passing. Maybe that is the > > reason it works correctly? I can only access machine B remotely, so I am > > unable to install a NIC on it. I have another PC that is used as a client > > that only has four cores, which also cannot be used for verification... > > > > > > > > Regards, > > > > Kai > > > > > > > > > > > > On Sun, Mar 12, 2017 at 2:59 AM, Wiles, Keith <[email protected]> > > wrote: > > > > > > > > > On Mar 11, 2017, at 9:45 AM, Kai Zhang <[email protected]> wrote: > > > > > > > > > > Hi Keith, > > > > > > > > > > Thank you for your reply. > > > > > > > > > > I have tested my program on two machines > > > > > A) 1 x Intel E5-2650 v4, 12 cores [UMA] > > > > > B) 2 x Intel E5-2640 v4, 10 cores [NUMA] > > > > > > > > > > I am very sure that the primary process uses different cores with > > the secondary process. The strange thing is that my program works correctly > > on machine B. But on machine A, the above issue happens with more than 4 > > cores assigned to the secondary process. > > > > > > > > > > I have tried to assign cores 1-5 to the secondary process and also > > tried other core assignment policies, but the error still happens > > rte_eal_init() with more than 4 cores. > > > > > > > > It would be nice to see both command lines. I am not sure I can help > > more all I can do is suggest some ideas to look at. > > > > > > > > Does machine B have the same number and type of NICs? Use ‘lspci | > > grep Ethernet’ to get a list of all Ethernet devices on both machines. > > > > > > > > What is the number of hugepages you have allocated for both machines. > > > > > > > > Also look at the cpu_layout.py script to see why adding the 5th core > > would be different on the two machines and try to make them the same. > > > > > > > > > > > > > > Regards, > > > > > Kai > > > > > > > > > > On Sat, Mar 11, 2017 at 10:52 PM, Wiles, Keith < > > [email protected]> wrote: > > > > > > > > > > > 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 > > > > > > > > > > > > > > > > > > Regards, > > > > Keith > > > > > > > > > > > > > > > > > > Regards, > > > Keith > > > > Regards, > > Keith > > > >
