Re: [dpdk-users] Running DPDK application in Linux init level 3
Thanks Rami Rosen I tried the steps you have suggested, and with that, I am able to boot in command line.But still I face the same packet drop issue. Any guess, what causing problem? Regards,Anand Prasad On Wednesday, 11 April, 2018, 1:02:47 AM IST, Rosen, Rami <rami.ro...@intel.com> wrote: Hi Anan, You better use the same Grub kernel command line parameters both in run level 5 and in run level 3. In order to be able to do so, keep the GRUB_CMDLINE_LINUX as what you had in init level 5, and assuming you are using one of the popular distros (like Fedora or recent Ubuntus), which runs systemd, the recommended way to what you call "disable the gui" is by a systemd command called systemctl. So, when the gui mode is enabled, you will get: systemctl get-default graphical.target And to disable the gui you can run: sudo systemctl enable multi-user.target --force sudo systemctl set-default multi-user.target After boot, both in run level 3 and in run level 5, you will be able to verify that the kernel command line is as expected with: cat /proc/cmdline Regards, Rami Rosen -Original Message- From: users [mailto:users-boun...@dpdk.org] On Behalf Of Anand Prasad Sent: Tuesday, April 10, 2018 15:12 To: users@dpdk.org Subject: [dpdk-users] Running DPDK application in Linux init level 3 Hi DPDK Team, I am trying to run DPDK application in Linux with init level 3 (no gui) and I am observing continuous packet drops on Rx side. But, If I boot Linux in init level 5 (GUI), then I dont see drops. I have provided linux command line arguments (for isolating the cpu cores and hugepates etc in "GRUB_CMDLINE_LINUX_DEFAULT" variable, and with those it's working fine in init level 5. But, not sureif these configuration are applicable when I boot in Init level 3? To boot in init level 3, I am setting GRUB_CMDLINE_LINUX="3" , is it correct? If not please suggest what is theother method. Thanks in advance.Anand
[dpdk-users] Running DPDK application in Linux init level 3
Hi DPDK Team, I am trying to run DPDK application in Linux with init level 3 (no gui) and I am observing continuous packet drops on Rx side. But, If I boot Linux in init level 5 (GUI), then I dont see drops. I have provided linux command line arguments (for isolating the cpu cores and hugepates etc in "GRUB_CMDLINE_LINUX_DEFAULT" variable, and with those it's working fine in init level 5. But, not sureif these configuration are applicable when I boot in Init level 3? To boot in init level 3, I am setting GRUB_CMDLINE_LINUX="3" , is it correct? If not please suggest what is theother method. Thanks in advance.Anand
Re: [dpdk-users] DPDK Performance tips
Hi Thomas, et.al. Thanks for response. I have followed the advices provided in the links you have provided but still i see the problem. Recently, I studied dpdk-pktgen application and developed an application very much similar to that. I mean, have made device, rx and tx, memmory pool and cache size configurations that pktgen uses. pktgen seems work fine without any Rx packet drop but my application reports packet drop. Any guess what could be wrong with my application? I see packet drops in my application, when I launch some other application (say browser or system monitor). But, in such situations, pktgen application works without any packet drops. Regards,Anand Prasad On Wednesday, 13 December 2017 4:41 PM, Thomas Monjalon <tho...@monjalon.net> wrote: 13/12/2017 09:14, Anand Prasad: > Hi Dpdk team, > Can anyone please share tips to get better DPDK performance? I have tried >to run DPDK test applications on various PC configurations with different CPU >Speeds, RAM Size/Speed and and PCIex16 2nd and 3rd generation connections... >but I don't get very consistent results. > The same test application does not behave similarly on 2 PC's with same >hardware configuration.But general observation is that, performance is better >on Intel motherboard with 3rd generation PCIe slot. When tried on Gigabyte >motherboard (even with higher CPU and RAM speeds), performance was very poor. > The performance issue I am facing is the Packet Drop issue on the Rx side. > Two PC's with exactly same hardware configuration, one PC drops packets >after few hours, but in the other PC I don't observe packet drop > Highly appreciate a quick response > Regards,Anand Prasad This is very complicate because it really depends on the hardware. Managing performance requires a very good knowledge of the hardware. You can find some basic advices in this guide for some Intel hardware: http://dpdk.org/doc/guides/linux_gsg/nic_perf_intel_platform.html You will also find some informations in the drivers guide. Example: http://dpdk.org/doc/guides/nics/mlx5.html#performance-tuning
[dpdk-users] DPDK Performance tips
Hi Dpdk team, Can anyone please share tips to get better DPDK performance? I have tried to run DPDK test applications on various PC configurations with different CPU Speeds, RAM Size/Speed and and PCIex16 2nd and 3rd generation connections... but I don't get very consistent results. The same test application does not behave similarly on 2 PC's with same hardware configuration.But general observation is that, performance is better on Intel motherboard with 3rd generation PCIe slot. When tried on Gigabyte motherboard (even with higher CPU and RAM speeds), performance was very poor. The performance issue I am facing is the Packet Drop issue on the Rx side. Two PC's with exactly same hardware configuration, one PC drops packets after few hours, but in the other PC I don't observe packet drop Highly appreciate a quick response Regards,Anand Prasad
[dpdk-users] Binding NIC to igb_uio or uio_pci_generic
Hi Dpdk Team, I request the team help me solve below issues: 1) Binding a NIC to DPDK igb_uio module: I am trying to bind the NIC to the igb_uio driver module [i.e. Unbinding it from the Linux control]. Using the dpdk-setup.sh script I am able to bind the NIC to uio_driver. After binding it to igb_uio module, that NIC is shown under the DPDK Comatiable drivers list, but there is no interface name for this NIC and am not able to use that NIC in DPDK tests. So, how to get the interface name for this NIC. Otherwise, is it possible to use without interface name? 2) Runnig DPDK test application without binding NIC to igb_uio module: The DPDK document clear says that, if a NIC is under Linux control, it will be ignored by the DPDK. what does it mean? Is it like, I will not be able to run any DPDK tests if I don't have NIC under DPDK compatible driver? As I have observed in my tests, even without binding a NIC to DPDK igb_uio module, I am able to run the DPDK tests on that NIC. So, what is the importance/significance of binding a NIC to DPDK igb_uio module? Thanks in advance for quick response. Regards,Anand Prasad
[dpdk-users] Fw: DPDK Error --> EAL: No free hugepages reported in hugepages-2048kB
On Thursday, 4 February 2016 5:56 PM, anand prasad wrote: Hi DPDK Team, ? I am new to DPDK and trying to understand DPDK by running the examples provided in the kit. ?I am using UBUNTU 14.04 64 bit OS and have successfully buit the kit on this system. Am getting below errors while executing below command: command: build/app/testpmd -c7 -n3 --vdev=eth_pcap0,iface=eth0 --vdev=eth_pcap1,iface=eth1 -- -i --nb-cores=2 --nb-ports=2 --total-num-mbufs=2048 command output: EAL: Detected lcore 0 as core 0 on socket 0 EAL: Detected lcore 1 as core 1 on socket 0 EAL: Detected lcore 2 as core 2 on socket 0 EAL: Detected lcore 3 as core 3 on socket 0 EAL: Detected lcore 4 as core 0 on socket 0 EAL: Detected lcore 5 as core 1 on socket 0 EAL: Detected lcore 6 as core 2 on socket 0 EAL: Detected lcore 7 as core 3 on socket 0 EAL: Support maximum 128 logical core(s) by configuration. EAL: Detected 8 lcore(s) EAL: No free hugepages reported in hugepages-2048kB PANIC in rte_eal_init(): Cannot get hugepage information 6: [build/app/testpmd() [0x439493]] 5: [/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7f86cf2dcec5]] 4: [build/app/testpmd(main+0x52) [0x436bf2]] 3: [build/app/testpmd(rte_eal_init+0xc43) [0x4b60f3]] 2: [build/app/testpmd(__rte_panic+0xc9) [0x431640]] 1: [build/app/testpmd(rte_dump_stack+0x1a) [0x4bcdfa]] Aborted (core dumped) Can anyone help me understand the issue and possible solution. Thanks in advanceRegards,Anand Prasad+91 9880666968
