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Old 10-27-2012, 11:17 AM   #1
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Registered: Oct 2012
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Anonymous linux process names listed by top command

Hallo everybody
Iam trying to track the CPU usage of the processes running(Iam using linux verison 2.6.24)Iam using the "top" command to list down the processes.The "top" command lists down all the processes currently running in good format along with names of each specific process under COMMAND column.However, a strange observation is that some of the processes that get listed by "top" command, doesn't have the process names instead the process name is listed with hex values instead of strings.There are a multiple process names like this.
Here is the snapshot of the top command that is showing up unknown process name(0x2dddff7c).

3230 root 20 0 351ms 122 22 S 0.3 37.6 0:08.85 0x2dddff7c
Here is the /proc/<pid>/status of this process(0x2dddff7c)
# cat status
Name: 0x2dddff7c
State: S (sleeping)
Tgid: 2260
Pid: 3231
PPid: 2226
TracerPid: 0
Uid: 0 0 0 0
Gid: 0 0 0 0
FDSize: 256
VmPeak: 342160 kB
VmSize: 255352 kB
VmLck: 0 kB
VmHWM: 106312 kB
VmRSS: 105952 kB
VmData: 167484 kB
VmStk: 1124 kB
VmExe: 4108 kB
VmLib: 60616 kB
VmPTE: 288 kB
Threads: 137
SigQ: 4/2981
SigPnd: 00000000000000000000000000000000
ShdPnd: 00000000000000000000000000000000
SigBlk: 00000000000000000000000000000000
SigIgn: 00000000000000000000000000001000
SigCgt: 000000000000000000000001f823eeff
CapInh: 0000000000000000
CapPrm: 00000000fffffeff
CapEff: 00000000fffffeff
voluntary_ctxt_switches: 14396
nonvoluntary_ctxt_switches: 57141
Any idea about why this process doesn't have name?
Old 10-27-2012, 11:46 AM   #2
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What does 'readlink -f /proc/<pid>/exe' return for those processes?


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