Public bug reported:
note: i'm not certain this is the right package to file this against.
upon upgrading from 13.10 to 14.04, i noticed that on a number of
computers, haveged was consuming 100% cpu. in short, although the
systems claims that the pool size is 4096:
>cat /proc/sys/kernel/random/poolsize
4096
entropy never gets above 4067:
>cat /proc/sys/kernel/random/entropy_avail
4067
when using -w =< 4067, haveged does not consume 100% cpu. with -w >
4067, it continuously consumes 100% cpu.
1] >lsb_release -rd
Description: Ubuntu 14.04 LTS
Release: 14.04
2] >apt-cache policy haveged
haveged:
Installed: 1.7c-1
Candidate: 1.7c-1
Version table:
*** 1.7c-1 0
500 http://us.archive.ubuntu.com/ubuntu/ trusty/universe amd64 Packages
100 /var/lib/dpkg/status
3] expected haveged to fill the entropy pool with 4096 bits of entropy
4] haveged is only able to fill the entropy pool with 4067 bits of
entropy, and consumes 100% cpu in trying to supply more
here is a sample of haveged output during symptomatic behavior:
>haveged --Foreground --verbose=-1 --run=0 --write=4068
haveged: Address 0=0x7fb285ea2e42
haveged: Address 1=0x7fb285ea29d1
haveged: Loop 1: offset=60538, delta=1137
haveged: Address 2=0x7fb285ea23cd
haveged: Loop 2: offset=58998, delta=1540
haveged: Address 3=0x7fb285ea1dc9
haveged: Loop 3: offset=57458, delta=1540
haveged: Address 4=0x7fb285ea17c5
haveged: Loop 4: offset=55918, delta=1540
haveged: Address 5=0x7fb285ea11c1
haveged: Loop 5: offset=54378, delta=1540
haveged: Address 6=0x7fb285ea0bbd
haveged: Loop 6: offset=52838, delta=1540
haveged: Address 7=0x7fb285ea05b9
haveged: Loop 7: offset=51298, delta=1540
haveged: Address 8=0x7fb285e9ffb5
haveged: Loop 8: offset=49758, delta=1540
haveged: Address 9=0x7fb285e9f9b1
haveged: Loop 9: offset=48218, delta=1540
haveged: Address 10=0x7fb285e9f3ab
haveged: Loop 10: offset=46676, delta=1542
haveged: Address 11=0x7fb285e9eda7
haveged: Loop 11: offset=45136, delta=1540
haveged: Address 12=0x7fb285e9e7a3
haveged: Loop 12: offset=43596, delta=1540
haveged: Address 13=0x7fb285e9e193
haveged: Loop 13: offset=42044, delta=1552
haveged: Address 14=0x7fb285e9db83
haveged: Loop 14: offset=40492, delta=1552
haveged: Address 15=0x7fb285e9d574
haveged: Loop 15: offset=38941, delta=1551
haveged: Address 16=0x7fb285e9cf64
haveged: Loop 16: offset=37389, delta=1552
haveged: Address 17=0x7fb285e9c94c
haveged: Loop 17: offset=35829, delta=1560
haveged: Address 18=0x7fb285e9c334
haveged: Loop 18: offset=34269, delta=1560
haveged: Address 19=0x7fb285e9bd1c
haveged: Loop 19: offset=32709, delta=1560
haveged: Address 20=0x7fb285e9b704
haveged: Loop 20: offset=31149, delta=1560
haveged: Address 21=0x7fb285e9b0ec
haveged: Loop 21: offset=29589, delta=1560
haveged: Address 22=0x7fb285e9aad4
haveged: Loop 22: offset=28029, delta=1560
haveged: Address 23=0x7fb285e9a4bc
haveged: Loop 23: offset=26469, delta=1560
haveged: Address 24=0x7fb285e99ea4
haveged: Loop 24: offset=24909, delta=1560
haveged: Address 25=0x7fb285e9988c
haveged: Loop 25: offset=23349, delta=1560
haveged: Address 26=0x7fb285e99274
haveged: Loop 26: offset=21789, delta=1560
haveged: Address 27=0x7fb285e98c5c
haveged: Loop 27: offset=20229, delta=1560
haveged: Address 28=0x7fb285e98644
haveged: Loop 28: offset=18669, delta=1560
haveged: Address 29=0x7fb285e9802c
haveged: Loop 29: offset=17109, delta=1560
haveged: Address 30=0x7fb285e97a14
haveged: Loop 30: offset=15549, delta=1560
haveged: Address 31=0x7fb285e973fc
haveged: Loop 31: offset=13989, delta=1560
haveged: Address 32=0x7fb285e96de4
haveged: Loop 32: offset=12429, delta=1560
haveged: Address 33=0x7fb285e967d4
haveged: Loop 33: offset=10877, delta=1552
haveged: Address 34=0x7fb285e961c4
haveged: Loop 34: offset=9325, delta=1552
haveged: Address 35=0x7fb285e95bb4
haveged: Loop 35: offset=7773, delta=1552
haveged: Address 36=0x7fb285e955a4
haveged: Loop 36: offset=6221, delta=1552
haveged: Address 37=0x7fb285e94f94
haveged: Loop 37: offset=4669, delta=1552
haveged: Address 38=0x7fb285e94984
haveged: Loop 38: offset=3117, delta=1552
haveged: Address 39=0x7fb285e9436c
haveged: Loop 39: offset=1557, delta=1560
haveged: Address 40=0x7fb285e93d57
haveged: Loop 40: offset=0, delta=1557
haveged starting up
haveged: procedure B: test6a:1/1, test6b:1/1, test7a:1/1, test7b:1/1, test8: 1/1
haveged: Completed tot procedure B after 1171766 bytes
haveged: procedure A: test0:1/1, test1:257/257, test2:257/257, test3:257/257,
test4:257/257, test5:2/2
haveged: Completed tot procedure A after 1035716 bytes
haveged: ver: 1.7c; arch: x86; vend: GenuineIntel; opts: (T); collect: 128K
haveged: cpu: (L4 VC); data: 32K (L4 V); inst: 32K (L4 V); idx: 21/40; sz:
32709/60538
haveged: tot tests: BA8: A:1/0 B: 1/0; continuous tests: B: A:0/0 B: 0/0; last
entropy estimate 7.99918
haveged: fills: 0, generated: 0
haveged: procedure B: test6a:1/1, test6b:1/1, test7a:1/1, test7b:1/1, test8: 1/1
haveged: Completed continuous procedure B after 1171766 bytes
haveged: 0 fill 1.58984 ms
haveged: 0 fill 11.248 ms
haveged: 0 fill 8.1792 ms
haveged: procedure B: test6a:1/1, test6b:1/1, test7a:1/1, test7b:1/1, test8: 1/1
haveged: Completed continuous procedure B after 1099276 bytes
haveged: 0 fill 2.23584 ms
haveged: 0 fill 11.4819 ms
haveged: 0 fill 8.19312 ms
haveged: procedure B: test6a:1/1, test6b:1/1, test7a:1/1, test7b:1/1, test8: 1/1
haveged: Completed continuous procedure B after 1097496 bytes
haveged: 0 fill 2.22119 ms
haveged: 0 fill 11.2661 ms
haveged: 0 fill 8.32812 ms
haveged: procedure B: test6a:1/1, test6b:1/1, test7a:1/1, test7b:1/1, test8: 1/1
haveged: Completed continuous procedure B after 1097876 bytes
haveged: 0 fill 2.23389 ms
haveged: 0 fill 11.3398 ms
haveged: 0 fill 8.28198 ms
haveged: procedure B: test6a:1/1, test6b:1/1, test7a:1/1, test7b:1/1, test8: 1/1
haveged: Completed continuous procedure B after 1099127 bytes
haveged: 0 fill 2.25903 ms
haveged: 0 fill 11.3379 ms
^Chaveged Stopping due to signal 2
** Affects: haveged (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1318678
Title:
haveged consumes 100% cpu when used with -w > 4067
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