Activity log for bug #2075557

Date Who What changed Old value New value Message
2024-08-02 00:13:17 William Tu bug added bug
2024-08-02 04:07:23 William Tu 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 * 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
2024-08-02 04:09:26 William Tu 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 * 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
2024-08-02 16:08:25 William Tu 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 * Explain the bug(s) We run a simple CPU-only xor application. test.c ------ 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 $ gcc test.c; time ./a.out 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
2024-11-06 08:30:17 Taihsiang Ho bug added subscriber Taihsiang Ho