Hello, > On 9/09/2019, at 8:45 PM, Jihyun Yu <yjh0...@gmail.com> wrote: > > It seems that time from ping command fluctuates. Here's a output from ping > command. > [...snip ping with negative rtt...]
This is symptomatic of unsynchronized time stamp counters (TSC). I would expect that setting: # sysctl kern.timecounter.hardware=acpihpet0 would fix your ping results, and probably improve your ntpd(8) performance, too. There has been some work in this area on -current. best, Richard. PS. Please make sure to include a complete dmesg next time - half a dmesg is like half a photograph! > 00=2828 01=a1a1 02=f7f7 03=2020 04=d9d9 05=5b5b 06=0b0b 07=3030 > isa0 at pcib0 > isadma0 at isa0 > com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo > pckbc0 at isa0 port 0x60/5 irq 1 irq 12 > pckbd0 at pckbc0 (kbd slot) > wskbd0 at pckbd0: console keyboard, using wsdisplay0 > pcppi0 at isa0 port 0x61 > spkr0 at pcppi0 > wbsio0 at isa0 port 0x2e/2: NCT6776F rev 0x33 > lm1 at wbsio0 port 0x290/8: NCT6776F > pci13 at mainbus0 bus 255 > "Intel E5 QPI Link" rev 0x07 at pci13 dev 8 function 0 not configured > vendor "Intel", unknown product 0x3c83 (class system subclass > miscellaneous, rev 0x07) at pci13 dev 8 function 3 not configured > vendor "Intel", unknown product 0x3c84 (class system subclass > miscellaneous, rev 0x07) at pci13 dev 8 function 4 not configured > "Intel E5 QPI Link" rev 0x07 at pci13 dev 9 function 0 not configured > vendor "Intel", unknown product 0x3c93 (class system subclass > miscellaneous, rev 0x07) at pci13 dev 9 function 3 not configured > vendor "Intel", unknown product 0x3c94 (class system subclass > miscellaneous, rev 0x07) at pci13 dev 9 function 4 not configured > "Intel E5 PCU" rev 0x07 at pci13 dev 10 function 0 not configured > "Intel E5 PCU" rev 0x07 at pci13 dev 10 function 1 not configured > "Intel E5 PCU" rev 0x07 at pci13 dev 10 function 2 not configured > "Intel E5 PCU" rev 0x07 at pci13 dev 10 function 3 not configured > "Intel E5 Scratch" rev 0x07 at pci13 dev 11 function 0 not configured > "Intel E5 Scratch" rev 0x07 at pci13 dev 11 function 3 not configured > "Intel E5 Unicast" rev 0x07 at pci13 dev 12 function 0 not configured > "Intel E5 Unicast" rev 0x07 at pci13 dev 12 function 1 not configured > "Intel E5 Unicast" rev 0x07 at pci13 dev 12 function 2 not configured > "Intel E5 SAD" rev 0x07 at pci13 dev 12 function 6 not configured > "Intel E5 SAD" rev 0x07 at pci13 dev 12 function 7 not configured > "Intel E5 Unicast" rev 0x07 at pci13 dev 13 function 0 not configured > "Intel E5 Unicast" rev 0x07 at pci13 dev 13 function 1 not configured > "Intel E5 Unicast" rev 0x07 at pci13 dev 13 function 2 not configured > "Intel E5 Broadcast" rev 0x07 at pci13 dev 13 function 6 not configured > "Intel E5 Home Agent" rev 0x07 at pci13 dev 14 function 0 not configured > "Intel E5 Home Agent" rev 0x07 at pci13 dev 14 function 1 not configured > "Intel E5 TA" rev 0x07 at pci13 dev 15 function 0 not configured > "Intel E5 RAS" rev 0x07 at pci13 dev 15 function 1 not configured > "Intel E5 TAD" rev 0x07 at pci13 dev 15 function 2 not configured > "Intel E5 TAD" rev 0x07 at pci13 dev 15 function 3 not configured > "Intel E5 TAD" rev 0x07 at pci13 dev 15 function 4 not configured > "Intel E5 TAD" rev 0x07 at pci13 dev 15 function 5 not configured > "Intel E5 TAD" rev 0x07 at pci13 dev 15 function 6 not configured > "Intel E5 Thermal" rev 0x07 at pci13 dev 16 function 0 not configured > "Intel E5 Thermal" rev 0x07 at pci13 dev 16 function 1 not configured > "Intel E5 Error" rev 0x07 at pci13 dev 16 function 2 not configured > "Intel E5 Error" rev 0x07 at pci13 dev 16 function 3 not configured > "Intel E5 Thermal" rev 0x07 at pci13 dev 16 function 4 not configured > "Intel E5 Thermal" rev 0x07 at pci13 dev 16 function 5 not configured > "Intel E5 Error" rev 0x07 at pci13 dev 16 function 6 not configured > "Intel E5 Error" rev 0x07 at pci13 dev 16 function 7 not configured > "Intel E5 DDRIO" rev 0x07 at pci13 dev 17 function 0 not configured > "Intel E5 R2PCIE" rev 0x07 at pci13 dev 19 function 0 not configured > "Intel E5 PCIE Monitor" rev 0x07 at pci13 dev 19 function 1 not configured > "Intel E5 QPI" rev 0x07 at pci13 dev 19 function 4 not configured > "Intel E5 QPI Link Monitor" rev 0x07 at pci13 dev 19 function 5 not > configured > "Intel E5 QPI Link Monitor" rev 0x07 at pci13 dev 19 function 6 not > configured > vmm0 at mainbus0: VMX/EPT > uhub4 at uhub0 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" > rev 2.00/0.00 addr 2 > uhub5 at uhub3 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" > rev 2.00/0.00 addr 2 > vscsi0 at root > scsibus4 at vscsi0: 256 targets > softraid0 at root > scsibus5 at softraid0: 256 targets > root on sd0a (74fd07b06a4f30a1.a) swap on sd0b dump on sd0b > > > Thanks, > Jihyun Yu
