Subject: Re: kern/32035: 3.0 MP machines can't keep time on busy nameservers
To: None <kern-bug-people@netbsd.org, gnats-admin@netbsd.org,>
From: Tracy Di Marco White <gendalia@gendalia.org>
List: netbsd-bugs
Date: 11/16/2005 04:51:01
The following reply was made to PR kern/32035; it has been noted by GNATS.
From: Tracy Di Marco White <gendalia@gendalia.org>
To: gnats-bugs@netbsd.org
Cc: nb-pr@gendalia.org
Subject: Re: kern/32035: 3.0 MP machines can't keep time on busy nameservers
Date: Tue, 15 Nov 2005 22:50:15 -0600
Tests with current kernels:
GENERIC current:
# uptime
1:10AM up 44 mins, 1 user, load averages: 1.34, 1.28, 1.19
# ntpq -c peers
remote refid st t when poll reach delay offset jitter
==============================================================================
+ns-1.iastate.ed 209.81.9.7 2 u 66 128 377 0.001 -165.85 38.963
*ns-2.iastate.ed 139.78.100.163 2 u 126 128 376 0.001 -180.71 29.847
+ns-0.iastate.ed 129.186.140.200 3 u 60 128 376 0.001 -172.12 35.968
+vs-1.iastate.ed 129.186.140.200 3 u 107 128 376 0.001 -174.66 34.986
+vs-2.iastate.ed 129.186.140.200 3 u 110 128 376 0.001 -175.68 34.243
+vs-3.iastate.ed 129.186.140.200 3 u 105 128 376 0.001 -175.04 34.816
-avi-lis.gw.ligh .CDMA. 1 u 58 128 377 57.016 -216.19 27.677
-timekeeper.isi. .GPS. 1 u 112 128 377 58.122 -233.07 43.461
-caesar.cs.wisc. 128.105.201.11 2 u 108 128 377 24.143 -203.54 22.302
GENERIC.MP current:
after 11 minutes (how long it took to sync):
ns-3# uptime
1:26AM up 11 mins, 1 user, load averages: 1.39, 1.15, 0.69
ns-3# ntpq -c peers
remote refid st t when poll reach delay offset jitter
==============================================================================
+ns-1.iastate.ed 209.81.9.7 2 u 34 64 376 0.001 1992.36 832.536
+ns-2.iastate.ed 139.78.100.163 2 u 30 64 156 0.001 1991.09 527.578
+ns-0.iastate.ed 129.186.140.200 3 u 31 64 276 0.001 1992.40 796.380
+vs-1.iastate.ed 129.186.140.200 3 u 32 64 375 0.001 2101.87 777.235
+vs-2.iastate.ed 129.186.140.200 3 u 34 64 376 0.001 1989.10 826.415
+vs-3.iastate.ed 129.186.140.200 3 u 31 64 376 0.001 1997.57 684.249
+avi-lis.gw.ligh .CDMA. 1 u 25 64 377 56.272 1888.00 636.618
*timekeeper.isi. .GPS. 1 u 27 64 177 58.033 1876.92 710.250
xcaesar.cs.wisc. 128.105.201.11 2 u 24 64 377 23.812 799.411 892.636
It's gradually losing time.
# uptime
1:49AM up 33 mins, 1 user, load averages: 0.75, 1.15, 1.05
# ntpq -c peers
remote refid st t when poll reach delay offset jitter
==============================================================================
ns-1.iastate.ed 128.252.19.1 2 u 85 256 376 0.001 4465.33 1084.36
ns-2.iastate.ed 139.78.100.163 2 u 81 256 376 0.001 4478.07 1025.98
ns-0.iastate.ed 129.186.140.200 3 u 79 256 376 0.001 4479.44 1028.17
vs-1.iastate.ed 129.186.140.200 3 u 88 256 376 0.001 4469.37 1034.34
vs-2.iastate.ed 129.186.140.200 3 u 93 256 376 0.001 4456.15 1088.17
vs-3.iastate.ed 129.186.140.200 3 u 144 256 376 0.001 4366.74 1114.75
xavi-lis.gw.ligh .CDMA. 1 u 209 256 377 56.361 4044.08 804.286
timekeeper.isi. .GPS. 1 u 144 256 277 64.982 4692.03 1389.01
caesar.cs.wisc. 128.105.201.11 2 u 137 256 377 23.910 2790.58 1067.63
ntpq> lpa
ind assID status conf reach auth condition last_event cnt
===========================================================
1 15412 b024 yes yes none reject reachable 2
2 15413 b044 yes yes none reject reachable 4
3 15414 b014 yes yes none reject reachable 1
4 15415 b034 yes yes none reject reachable 3
5 15416 b024 yes yes none reject reachable 2
6 15417 b034 yes yes none reject reachable 3
7 15418 b114 yes yes none falsetick reachable 1
8 15419 b014 yes yes none reject reachable 1
9 15420 b014 yes yes none reject reachable 1
GENERIC.MPACPI current
ns-3# uptime
2:01AM up 8 mins, 1 user, load averages: 1.20, 0.99, 0.55
ns-3# ntpq -c peers
remote refid st t when poll reach delay offset jitter
==============================================================================
ns-1.iastate.ed 209.81.9.7 2 u 13 64 65 0.004 1937.53 717.329
ns-2.iastate.ed 139.78.100.163 2 u 9 64 76 0.004 1765.27 543.583
ns-0.iastate.ed 129.186.140.200 3 u 8 64 377 0.004 1940.07 1132.19
vs-1.iastate.ed 129.186.140.200 3 u 11 64 57 0.004 1944.99 690.699
vs-2.iastate.ed 129.186.140.200 3 u 14 64 76 0.004 1754.90 541.711
+vs-3.iastate.ed 129.186.140.200 3 u 12 64 176 0.004 1761.58 712.149
*avi-lis.gw.ligh .CDMA. 1 u 8 64 377 56.436 1317.31 664.365
timekeeper.isi. .GPS. 1 u 7 64 277 61.388 1937.87 1015.03
+caesar.cs.wisc. 128.105.201.11 2 u 3 64 377 24.059 850.775 659.560
# uptime
2:31AM up 37 mins, 1 user, load averages: 1.02, 1.05, 0.99
# ntpq
ntpq> peers
remote refid st t when poll reach delay offset jitter
==============================================================================
ns-1.iastate.ed 128.252.19.1 2 u 52 128 376 0.004 5155.84 1183.69
ns-2.iastate.ed 139.78.100.163 2 u 50 128 376 0.004 5158.36 1180.61
ns-0.iastate.ed 129.186.140.200 3 u 99 128 376 0.004 5075.67 1148.29
vs-1.iastate.ed 129.186.140.200 3 u 107 128 376 0.004 5074.47 1154.17
vs-2.iastate.ed 129.186.140.200 3 u 42 128 376 0.004 5175.62 1183.79
vs-3.iastate.ed 129.186.140.200 3 u 105 128 376 0.004 5074.49 1152.87
avi-lis.gw.ligh .CDMA. 1 u 101 128 377 56.122 5042.92 1093.60
xtimekeeper.isi. .GPS. 1 u 97 128 377 59.179 3670.09 851.004
xcaesar.cs.wisc. 128.105.201.11 2 u 96 128 377 24.147 4499.65 688.713
ntpq> lpa
ind assID status conf reach auth condition last_event cnt
===========================================================
1 3580 b034 yes yes none reject reachable 3
2 3581 b034 yes yes none reject reachable 3
3 3582 b014 yes yes none reject reachable 1
4 3583 b034 yes yes none reject reachable 3
5 3584 b034 yes yes none reject reachable 3
6 3585 b024 yes yes none reject reachable 2
7 3586 b014 yes yes none reject reachable 1
8 3587 b114 yes yes none falsetick reachable 1
9 3588 b114 yes yes none falsetick reachable 1
ntpq>
GENERIC.UP current (A GENERIC kernel with "options MPBIOS" & ioapic enabled.)
# uptime
10:12PM up 9 mins, 2 users, load averages: 1.32, 1.23, 0.72
# ntpq -c peers
remote refid st t when poll reach delay offset jitter
==============================================================================
ns-1.iastate.ed 128.252.19.1 2 u 34 64 277 0.001 2317.93 1097.24
ns-2.iastate.ed 139.78.100.163 2 u 29 64 356 0.001 2155.96 1128.59
ns-0.iastate.ed 129.186.140.200 3 u 28 64 337 0.001 2329.00 1255.91
vs-1.iastate.ed 129.186.140.200 3 u 30 64 276 0.001 2157.84 984.052
vs-2.iastate.ed 129.186.140.200 3 u 28 64 376 0.001 2166.57 1014.74
vs-3.iastate.ed 129.186.140.200 3 u 25 64 375 0.001 2341.10 1324.62
xavi-lis.gw.ligh .CDMA. 1 u 30 64 377 56.639 744.180 913.299
*timekeeper.isi. .GPS. 1 u 20 64 377 57.350 2033.97 949.629
+caesar.cs.wisc. 128.105.201.11 2 u 15 64 377 24.268 1687.09 718.903
# uptime
10:40PM up 37 mins, 2 users, load averages: 1.40, 1.32, 1.26
# ntpq -c peers -c lpa
remote refid st t when poll reach delay offset jitter
==============================================================================
ns-1.iastate.ed 128.252.19.1 2 u 34 128 377 0.001 5449.53 1136.97
ns-2.iastate.ed 139.78.100.163 2 u 31 128 376 0.001 5448.35 1161.95
ns-0.iastate.ed 129.186.1.200 3 u 31 128 377 0.001 5457.95 1134.81
vs-1.iastate.ed 152.2.21.1 3 u 36 128 376 0.001 5437.43 1160.13
vs-2.iastate.ed 129.186.140.200 3 u 22 128 376 0.001 5476.76 1184.05
vs-3.iastate.ed 129.186.140.200 3 u 78 128 376 0.001 5401.07 1160.89
avi-lis.gw.ligh .CDMA. 1 u 29 128 377 56.986 5518.57 1159.55
xtimekeeper.isi. .GPS. 1 u 78 128 377 57.778 4211.38 702.222
xcaesar.cs.wisc. 128.105.201.11 2 u 76 128 377 24.397 4763.41 667.182
ind assID status conf reach auth condition last_event cnt
===========================================================
1 13484 b024 yes yes none reject reachable 2
2 13485 b014 yes yes none reject reachable 1
3 13486 b014 yes yes none reject reachable 1
4 13487 b024 yes yes none reject reachable 2
5 13488 b024 yes yes none reject reachable 2
6 13489 b014 yes yes none reject reachable 1
7 13490 b014 yes yes none reject reachable 1
8 13491 b114 yes yes none falsetick reachable 1
9 13492 b114 yes yes none falsetick reachable 1