root@c-237-155-120-p88-00-0-bf2:/boot# diff config-5.15.0-1043-bluefield config-5.15.0-1044-bluefield 3c3 < # Linux/arm64 5.15.0-1043-bluefield Kernel Configuration --- > # Linux/arm64 5.15.0-1044-bluefield Kernel Configuration 37c37 < CONFIG_VERSION_SIGNATURE="Ubuntu 5.15.0-1043.45-bluefield 5.15.149" --- > CONFIG_VERSION_SIGNATURE="Ubuntu 5.15.0-1044.46-bluefield 5.15.152" 1663d1662 < CONFIG_NET_SCH_CBQ=m 1666d1664 < CONFIG_NET_SCH_ATM=m 1678d1675 < CONFIG_NET_SCH_DSMARK=m 2154a2152 > # CONFIG_PCI_EPF_VNTB is not set
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-bluefield in Ubuntu. https://bugs.launchpad.net/bugs/2075557 Title: performance degradation on BlueField-2 5.15.0-1044-bluefield Status in linux-bluefield package in Ubuntu: New Bug description: * Explain the bug(s) We run a simple CPU-only xor application. int main(void) { long i; int count = 0; for (i=0; i< 10000000000; i++) { count = count ^ i; } return 0; } tested on BlueField-2 and found consistent performance degradation. * Performance install from debian kernel packages: /auto/sw/integration/bluefield_build/kernels/Ubuntu22.04-kernels/*.deb kernel 5.15.0-1042-bluefield: 39sec kernel 5.15.0-1043-bluefield (1043): 39sec kernel 5.15.0-1044-bluefield: 49 sec kernel 5.15.0-1048-bluefield: 49 sec * Performance-2 However, If we download the kernel source and compile, then we don't see the difference /boot/vmlinuz-5.15.160 (1049): 49sec /boot/vmlinuz-5.15.160-20576-gba1f73c15047 (1043): 49sec also test other versions bf-1024 bf-1030 bf-1044 bf-1049 1024, 1030, 1044, 1049 all shows the same performance, 49 sec To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-bluefield/+bug/2075557/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
