Hi S.Ancelot: I compare my kernel config with your config-3.18.20cobalt,especially with the graphic part, and make the config nearly the same as yours.And the system's graphic runs in low performance, but also the latency test results in big value. For now, our hardware(J1900) runs in Ubuntu 16.04 desktop with graphic,could this goal really be reached? Or, what can I do next, I am comfused. -------------------------------- Best regards Kevin
----- Original Message ----- From: Stéphane_Ancelot <[email protected]> To: [email protected] Subject: Re: 回复：Re: 回复：Re: 回复：j1900_latency Date: 2019-09-11 16:06 Le 11/09/2019 à 09:46, Kevin a écrit : Hi S.Ancelot: The kernel may not be locked to v4.9.38, because I want to use Ubuntu 16.04 desktop version,so I chose this kernel version. And the last testing result that I sent to you was under the test without video driver, just ran in runlevel 3,command line mode. If you really have v4.x kernel config,could you send me a copy,that I could compare with. Also,for your step: "cp .config config.backup.11.09.2019 cp newconfig .config make oldconfig (reply to added options) then compare .config with config.backup.11.09.2019" in your kernel folder I couldn't get you mean,sorry. (Doing those on my hardware?) -------------------------------- Best regards Kevin ----- Original Message ----- From: Stéphane_Ancelot <[email protected]> To: [email protected] Subject: Re: 回复：Re: 回复：Re: 回复：j1900_latency Date: 2019-09-11 14:31 Hi Kevin ! Are you mandatory locked to v4.9.38 (eg 5.4 )? To take into account my config: cp .config config.backup.11.09.2019 cp newconfig .config make oldconfig (reply to added options) then compare .config with config.backup.11.09.2019 I have got some 4.x config available I will check. Have you run it with or without video driver ? Regards, Steph Le 11/09/2019 à 07:57, Kevin a écrit : Hi S.Ancelot: The attached file is the latency test result, running the whole night, you can see the worst value is:16.910 You told me to compare the config file with yours,but my kernel version is v4.9.38, is very different from yours,and to find out the whole difference is very difficult. So, do you have any other recommendation to improve my kernel setup file? Thanks very much! -------------------------------- Best regards Kevin ----- Original Message ----- From: Stéphane_Ancelot <[email protected]> To: [email protected] Subject: Re: 回复：Re: 回复：Re: 回复：j1900_latency Date: 2019-09-10 17:59 Le 10/09/2019 à 10:14, 鲁克文 a écrit : Hi S.Ancelot: I modify the kernel cmdline with runlevel 3, and start the system login with command line, and then run latency test for about 20 min(meanwhile I use a another PC to ping this one with big packet to add network loading). The worst value is : 6.560 （us）, does it seem a good result? If it is really impacted by the graphic, should I just use framebuffer? No, I don't think so. compare kernel setup. -------------------------------- Best regards Kevin ----- 原始邮件 ----- 发件人：Stéphane_Ancelot <[email protected]> 收件人：[email protected] 主题：Re: 回复：Re: 回复：j1900 latency 日期：2019年09月10日 14点37分 Le 10/09/2019 à 08:34, 鲁克文 a écrit : Hi S.Ancelot: OK, I'll compare the config file with mine. Also, because our device needs a desktop window, so could I just use the framebuffer to do the graphic thing? I understand but this is only to try and isolate graphic 2D/3D driver. launching "init 3 " command should switch your system to runlevel 3 until the next reboot -------------------------------- Best regards Kevin ----- 原始邮件 ----- 发件人：Stéphane_Ancelot <[email protected]> 收件人：[email protected] 主题：Re: 回复：j1900 latency 日期：2019年09月10日 14点23分 I am using the NEXCOM NISE 2400 - J1900 platform. 1/ I enclosed my kernel settings , in order to be compared with yours. 2/ Can you switch your linux to init 3 (without graphic) and run latency test again to be sure it is impacted by the graphic video driver. Regards, S.Ancelot Le 10/09/2019 à 06:48, 鲁克文 a écrit : Hi S.Ancelot: Thanks very much for your experience. On my current hardware, I use the kernel parameter "xenomai.smi=1 xenomai.smi_mask=0x0860ffff " ther kernel message shows: SMI workaround failed! Maybe the BIOS vendor lock the SMI register, I will try another hardware, also using J1900, to see whether it can work. On the other hand, I want to ask: for the J1900 hardware platform,do I need to make any other special setting when I compile the kernel, or any other thing should I pay attention to? Thanks! Currently, the system's configuration: J1900, Ubuntu 16.04 desktop version, kernel:v4.9.24; xenomai v3.0.5. -------------------------------- Best regards Kevin ----- 原始邮件 ----- 发件人：Stéphane_Ancelot <[email protected]> 收件人：[email protected] 主题：j1900 latency 日期：2019年09月09日 22点46分 Hi, We may share some personal experience with J1900 platform. try to setup following kernel options xenomai.smi=1 xenomai.smi_mask=0x0860ffff Regards, S.Ancelot
