It happens every five/ten minutes. Here is what is in my journal log file. I will recompile it without striping out symbols to have a nice call stack but in the meantime, if it is a known issue, please point me to possible workaround:

Jun 10 22:51:13 Wailaba2 kernel: bitcoin-net[5370]: segfault at 10 ip 00007f21b1cb5d31 sp 00007f216d3d39a0 error 6 in libc-2.17.so[7f21b1c3c000+1a3000]
Jun 11 00:07:09 Wailaba2 kernel: bitcoin-net[5980]: segfault at 10 ip 00007f7e25852d31 sp 00007f7dd7feea80 error 6 in libc-2.17.so[7f7e257d9000+1a3000]
Jun 11 00:36:17 Wailaba2 kernel: bitcoin-net[6674]: segfault at 10 ip 00007f66675a3d31 sp 00007f6631393a80 error 6 in libc-2.17.so[7f666752a000+1a3000]
Jun 11 00:46:53 Wailaba2 kernel: bitcoin-net[6815]: segfault at 10 ip 00007f5ec29aad31 sp 00007f5e79ddf9a0 error 6 in libc-2.17.so[7f5ec2931000+1a3000]
Jun 11 00:53:49 Wailaba2 kernel: bitcoin-net[6929]: segfault at 12 ip 00007fed00515d31 sp 00007fecb27eb9a0 error 6 in libc-2.17.so[7fed0049c000+1a3000]
Jun 11 00:56:00 Wailaba2 kernel: bitcoin-net[7000]: segfault at 10 ip 00007fdd80d3cd31 sp 00007fdd45feaa50 error 6 in libc-2.17.so[7fdd80cc3000+1a3000]

I try to reduce the stock value of 1.175v with cgminer 3.1.0. I am using Linux. Here is cgminer output:

Select GPU to change settings on:
0
Temp: 78.0 C
Fan Speed: 85% (3191 RPM)
Engine Clock: 1050 MHz
Memory Clock: 1375 Mhz
Vddc: 1.175 V
Activity: 99%
Powertune: 0%
Fan autotune is enabled (0-85)
GPU engine clock autotune is enabled (300-1050)
Change [A]utomatic [E]ngine [F]an [M]emory [V]oltage [P]owertune
Or press any other key to continue
Enter GPU voltage (0.800 - 1.200 V):
1.150
Driver reports success but check values below
Temp: 78.0 C
Fan Speed: 85% (3193 RPM)
Engine Clock: 1050 MHz
Memory Clock: 1375 Mhz
Vddc: 1.175 V
Activity: 99%
Powertune: 0%
Fan autotune is enabled (0-85)
GPU engine clock autotune is enabled (300-1050)
Change [A]utomatic [E]ngine [F]an [M]emory [V]oltage [P]owertune
Or press any other key to continue

It doesn't seem to work.

Suggestions?

Thank you!

By running the client, I understand that I become a node in the p2p network. I have installed it rougly 10 days ago and I just realized minutes ago that it is uploading roughly 20GB/day. It says that I have 79 active connections to the network. With this rate, I am going to bust my monthly bandwith limit.

Or maybe it is cgminer or a mix of both. Not sure which one. I'll investigate. Which application in the BTC ecosystem is know to be network hungry?

Is there any way to limit how much network the client is using.

[397.3]

From top:

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND 
 7449 lano1106   1   0 20.905g 119116  69612 S 397.3 1.955 580:16.86 cgminer

lano1106@Wailaba2 /proc/7449 $ cat status
Name:   cgminer
State:   S (sleeping)
Tgid:   7449
Pid:   7449
PPid:   590
TracerPid:   0
Uid:   1000   1000   1000   1000
Gid:   100   100   100   100
FDSize:   256
Groups:   100 1000
VmPeak:   21977668 kB
VmSize:   21920328 kB
VmLck:          0 kB
VmPin:          0 kB
VmHWM:     119120 kB
VmRSS:     119116 kB
VmData:   21800004 kB
VmStk:        136 kB
VmExe:        364 kB
VmLib:      13868 kB
VmPTE:        544 kB
VmSwap:          0 kB
Threads:   39
SigQ:   0/47567
SigPnd:   0000000000000000
ShdPnd:   0000000000000000
SigBlk:   0000000000000000
SigIgn:   0000000000001000
SigCgt:   0000000188084002
CapInh:   0000000000000000
CapPrm:   0000000000000000
CapEff:   0000000000000000
CapBnd:   0000001fffffffff
Seccomp:   0
Cpus_allowed:   00000000,0000ffff
Cpus_allowed_list:   0-15
Mems_allowed:   1
Mems_allowed_list:   0
voluntary_ctxt_switches:   5162
nonvoluntary_ctxt_switches:   57

doing nothing special. No cpu mining. I am just running 2 small Nvidia GPU.

Anyone else has the same high number of threads with cgminer?