On Mon, May 3, 2021 at 3:49 PM Tony Lindgren <tony@xxxxxxxxxxx> wrote: > > Hi, > > * Mighty M <mightymb17@xxxxxxxxx> [210430 07:49]: > > I have a Samsung Galaxy Tab 2 which has an OMAP 4430 clocked at 1Ghz, > > with that there is quite some difference in performance when comparing > > the mainline and downstream kernels. To confirm my suspicions I ran > > UnixBench(https://github.com/kdlucas/byte-unixbench) on both of them, > > the results are as follows - > > 1) Downstream (running SailfishOS) - Kernel Source - > > https://github.com/CyanogenMod/android_kernel_samsung_espresso10, I > > get a result of 580.4 in dual-core and 292.9 in single core. I > > compiled UnixBench manually. > > 2) Mainline (running PostMarketOS) - Kernel Source - > > https://github.com/MightyM17/linux_openpvrsgx/tree/letux-pvrsrvkm-5.12-rc1, > > when using UnixBench package from PostMarketOS repo, I get a score of > > 352.7 dual core and 192.7 single core, and compiling it myself and > > then running gives the score 415.1 dual core and 209.9 single core. > > > > The downstream scores are quite high even beating Droid 4 which has > > CPU clocked at 1.2Ghz when Tab 2 has it at 1 GHz. > > > > Why is there so much difference in mainline and downstream and what > > can be done to improve the performance. > > If you have a good test case, it would be nice to narrow down the > performance issue and fix it. My guess is that the following might > help with the mainline Linux kernel built with omap2plus_defconfig: > > - Disable CONFIG_DEBUG in .config > > - Disable CONFIG_ARCH_OMAP2 in .config to disable the build options > for ARMv6 > > If the above does not help, then let's look further in the L2 > settings for example. > > Regards, > > Tony > > Hello, CONFIG_ARCH_OMAP2 is already disabled in my .config and I couldnt find CONFIG_DEBUG. https://pastebin.ubuntu.com/p/qKYpCPCk5Q/ here is my .config file. Anyways it seems we need to look further now. Thanks!
