Hello Freebsd-hackers, I'm experiencing very strange situation on my lab system which is E3-1220v2, 8GiB of RAM and 850 EVO SATA SSD (with single ZFS pool). It runs CURRENT r341157. Kernel is built *without* INVARIANTS and other heavy debug aids. Everything works great — but compilation. "make -j *1* buildkernel" takes forever and each compiler invocation takes up to 10 seconds. For example, I've clocked compilation of sys/dev/aic7xxx/aic7xxx_93cx6.c by stopwatch and it takes 9 seconds. Please note, it is SINGLE JOB build. If I run "make -j4" it will be much longer for each compiler out of 4. And all this time "cc" / "c++" consume 100% of CPU. Even when build is single-job, system becomes unresponsive. With 4-job build running it could takes up to minute to switch screen's windows! Another strange thing I noticed: when system is in such state, "top -SH" shows that sometimes very low-profile processes, like clock software interrupt (!) could consume large amount of CPU for short periods time. When system is idle there never will be "intr{swi4: clock (0)}" consuming 55% CPU for one "frame" or sshd, or screen itself. I'm completely lost. Is it problem of software? Hardware? If it is hardware problem what should I blame? I've checked all "standard" places — CPU is not throttling, SSD looks perfectly Ok according to SMART and there is no complains from AHCI driver about timeouts and such, system doesn't start to use swap. -- Best regards, Lev mailto:lev_at_FreeBSD.orgReceived on Sat Dec 08 2018 - 10:13:07 UTC
This archive was generated by hypermail 2.4.0 : Wed May 19 2021 - 11:41:19 UTC