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Bug #3222
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rcapd behaves poorly when under extreme load
Status:
New
Priority:
Low
Assignee:
-
Category:
cmd - userland programs
Start date:
2012-09-25
Due date:
% Done:
0%
Estimated time:
Difficulty:
Medium
Tags:
needs-triage
Gerrit CR:
Description
Joyent has a fix for that called:
OS-11 rcapd behaves poorly when under extreme load
[[https://github.com/joyent/illumos-joyent/commit/9230f57fd5dc4b0898a592a83cfa3f7b18b26718]]
Under a higher load when multiple zones are used 'rcapd' can consume almost 100% single cpu core at SYS.
CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl 0 0 0 47 881 538 3667 13 142 107 0 8444 2 8 0 90 1 0 0 29 3106 1999 4212 10 94 71 0 8332 2 24 0 74 2 0 0 28 169 48 3496 14 86 57 0 4091 1 6 0 93 3 0 0 23 234 68 3105 14 103 60 0 7464 1 12 0 87 4 0 0 47 2500 1356 1021 21 55 42 0 1546 0 93 0 7 5 0 0 381 2712 1028 5456 176 420 7 0 5649 1 56 0 43 6 0 0 359 3849 2112 5336 201 398 11 0 5804 1 58 0 41 7 0 0 0 8083 4012 0 0 0 4 0 0 0 100 0 0
# dtrace -n 'profile-997hz /arg0 && execname == "rcapd"/ { @s[stack()] = count();} tick-15sec { trunc(@s, 7); printa(@s); exit(0); }'
dtrace: description 'profile-997hz ' matched 2 probes
CPU ID FUNCTION:NAME
14 77696 :tick-15sec
unix`page_exists+0x77
genunix`vmu_calculate_seg+0x3ac
genunix`vmu_calculate_proc+0x259
genunix`vmu_calculate+0xd2
genunix`vm_getusage+0x23a
genunix`rusagesys+0x64
unix`sys_syscall+0x17a
201
unix`page_exists+0x7d
genunix`vmu_calculate_seg+0x3ac
genunix`vmu_calculate_proc+0x259
genunix`vmu_calculate+0xd2
genunix`vm_getusage+0x23a
genunix`rusagesys+0x64
unix`sys_syscall+0x17a
205
genunix`vmu_calculate_seg+0x38c
genunix`vmu_calculate_proc+0x259
genunix`vmu_calculate+0xd2
genunix`vm_getusage+0x23a
genunix`rusagesys+0x64
unix`sys_syscall+0x17a
223
unix`page_exists+0x69
genunix`vmu_calculate_seg+0x3ac
genunix`vmu_calculate_proc+0x259
genunix`vmu_calculate+0xd2
genunix`vm_getusage+0x23a
genunix`rusagesys+0x64
unix`sys_syscall+0x17a
940
genunix`vmu_calculate_seg+0x3c2
genunix`vmu_calculate_proc+0x259
genunix`vmu_calculate+0xd2
genunix`vm_getusage+0x23a
genunix`rusagesys+0x64
unix`sys_syscall+0x17a
1193
unix`page_exists+0x74
genunix`vmu_calculate_seg+0x3ac
genunix`vmu_calculate_proc+0x259
genunix`vmu_calculate+0xd2
genunix`vm_getusage+0x23a
genunix`rusagesys+0x64
unix`sys_syscall+0x17a
3687
unix`page_exists+0x79
genunix`vmu_calculate_seg+0x3ac
genunix`vmu_calculate_proc+0x259
genunix`vmu_calculate+0xd2
genunix`vm_getusage+0x23a
genunix`rusagesys+0x64
unix`sys_syscall+0x17a
5057
As a workaround one may need to disable capped-memory from zones:
zonecfg -z zone1 remove capped-memory zoneadm -z zone1 halt zoneadm -z zone1 boot
Updated by Rich Lowe almost 10 years ago
- Subject changed from OS-11 rcapd behaves poorly when under extreme load to rcapd behaves poorly when under extreme load
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