Hi all, since 2 or 3 weeks ago, I noticed that my old Penryn-based Intel Pentium T4200 notebook lagged a lot. System time was running a lot slower, sometimes even looked like it freezed. Keystroke repeat rate was slow too.
Since system time is slow, I tried to change timecounter from default TSC to HPET. And it resumed normal immediately. The same world binary works fine on other Ivybridge and Haswell desktops, so I assume this may be related to CPU or mainboard generations. version is FreeBSD jsli-nb 12.0-CURRENT FreeBSD 12.0-CURRENT #0 r311687: Mon Jan 9 04:07:27 CST 2017 jsli@4cbsd:/personal/freebsd/obj/x64/personal/freebsd/fbsdsrc/sys/MINIMAL-NODEBUG amd64 and CPU is CPU: Pentium(R) Dual-Core CPU T4200 @ 2.00GHz (1995.04-MHz K8-class CPU) Origin="GenuineIntel" Id=0x1067a Family=0x6 Model=0x17 Stepping=10 Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> Features2=0xc00e39d<SSE3,DTES64,MON,DS_CPL,EST,TM2,SSSE3,CX16,xTPR,PDCM,XSAVE,OSXSAVE> AMD Features=0x20100800<SYSCALL,NX,LM> AMD Features2=0x1<LAHF> TSC: P-state invariant, performance statistics Tested similar OS rev on another Intel Core 2 Duo E7400 Wolfdale (the same generation as the Pentium T4200). The same lag also happens on it. BTW on both system, cpuX:timer interrupts do not fire at all and count remains 0. -Jia-Shiun _______________________________________________ freebsd-current@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
