Booting FreeBSD with default tunnables: kern.elf64.aslr.enable=1 vm.cluster_anon=1 vm.aslr_restarts: 0 xmrig hashrate: 1138 vm.aslr_restarts: 0 running some desktop software from ports tree (browsers, image editors, office etc). CPU: 3,7% user, 0,0% nice, 2,0% system, 0,3% interrupt, 94,0% idle Mem: 3825M Active, 3338M Inact, 55M Laundry, 3237M Wired, 16K Buf, 3326M Free vm.aslr_restarts: 504 exiting from those programs. CPU: 0,5% user, 0,0% nice, 0,4% system, 0,0% interrupt, 99,1% idle Mem: 651M Active, 2013M Inact, 16K Laundry, 3147M Wired, 16K Buf, 7964M Free vm.aslr_restarts: 504 running xmrig to send different SIG* few times. xmrig: 1140 killall -SIGBUS xmrig xmrig: 1125 killall -SIGSEGV xmrig xmrig: 1128 running firefox killall -SIGSEGV firefox xmrig: 1115 vm.aslr_restarts: 600 CPU: 14,4% user, 0,0% nice, 1,5% system, 0,1% interrupt, 84,0% idle Mem: 3037M Active, 2388M Inact, 216K Laundry, 4310M Wired, 16K Buf, 4039M Free Second booting FreeBSD with tunnables: kern.elf64.aslr.enable=0 vm.cluster_anon=2 vm.aslr_restarts: 0 xmrig: 1193 vm.aslr_restarts: 0 running same desktop soft. CPU: 2,5% user, 0,0% nice, 0,8% system, 0,2% interrupt, 96,6% idle Mem: 3571M Active, 3510M Inact, 51M Laundry, 3326M Wired, 247K Buf, 3324M Free vm.aslr_restarts: 0 exitting from runned desktop soft. Running only firefox and chrome to send them SIGSEGV few times. killall -SIGSEGV firefox killall -SIGSEGV chrome CPU: 0,4% user, 0,0% nice, 0,4% system, 0,0% interrupt, 99,2% idle Mem: 469M Active, 2436M Inact, 528K Laundry, 3174M Wired, 247K Buf, 7701M Free vm.aslr_restarts: 0 xmrig: 1186
There were some changes to the way address space allocation works when ASLR is enabled, they are in 14.0 but not in 13.2. It would be worth re-testing with one of the 14.0 release candidates.