Get PID from TID
Clash Royale CLAN TAG#URR8PPP
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I run iotop to check on programs that are heavy disk users, in case I need to decrease their priority. Usually this is good enough, but iotop only shows thread ID (TID), and sometimes I want to know process ID (PID) so I can find out more about which process is responsible.
Unfortunately, while ps can display TID (a.k.a SPID, LWP), it doesn't have a flag to take a list of TIDs the way it does for a list of PIDs with --pid. The best I can do is list TIDs and then grep the output. For example, if the thread id is 792, I can do
$ ps -eLf | grep ' 792 '
which works reasonably well, but is a little inelegant.
Is there a better way?
ps thread pthreads
asked Mar 15 at 16:35
Nathaniel M. Beaver
180115
add a comment |Â
up vote
3
down vote
favorite
I run iotop to check on programs that are heavy disk users, in case I need to decrease their priority. Usually this is good enough, but iotop only shows thread ID (TID), and sometimes I want to know process ID (PID) so I can find out more about which process is responsible.
Unfortunately, while ps can display TID (a.k.a SPID, LWP), it doesn't have a flag to take a list of TIDs the way it does for a list of PIDs with --pid. The best I can do is list TIDs and then grep the output. For example, if the thread id is 792, I can do
$ ps -eLf | grep ' 792 '
which works reasonably well, but is a little inelegant.
Is there a better way?
ps thread pthreads
asked Mar 15 at 16:35
Nathaniel M. Beaver
180115
add a comment |Â
up vote
3
down vote
favorite
up vote
3
down vote
favorite
I run iotop to check on programs that are heavy disk users, in case I need to decrease their priority. Usually this is good enough, but iotop only shows thread ID (TID), and sometimes I want to know process ID (PID) so I can find out more about which process is responsible.
Unfortunately, while ps can display TID (a.k.a SPID, LWP), it doesn't have a flag to take a list of TIDs the way it does for a list of PIDs with --pid. The best I can do is list TIDs and then grep the output. For example, if the thread id is 792, I can do
$ ps -eLf | grep ' 792 '
which works reasonably well, but is a little inelegant.
Is there a better way?
ps thread pthreads
asked Mar 15 at 16:35
Nathaniel M. Beaver
180115
I run iotop to check on programs that are heavy disk users, in case I need to decrease their priority. Usually this is good enough, but iotop only shows thread ID (TID), and sometimes I want to know process ID (PID) so I can find out more about which process is responsible.
Unfortunately, while ps can display TID (a.k.a SPID, LWP), it doesn't have a flag to take a list of TIDs the way it does for a list of PIDs with --pid. The best I can do is list TIDs and then grep the output. For example, if the thread id is 792, I can do
$ ps -eLf | grep ' 792 '
which works reasonably well, but is a little inelegant.
Is there a better way?
ps thread pthreads
asked Mar 15 at 16:35
Nathaniel M. Beaver
180115
asked Mar 15 at 16:35
Nathaniel M. Beaver
180115
asked Mar 15 at 16:35
Nathaniel M. Beaver
180115
asked Mar 15 at 16:35
Nathaniel M. Beaver
180115
180115
add a comment |Â
add a comment |Â
1 Answer
1
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oldest
votes
up vote
5
down vote
accepted
You can always do:
ps -eLo pid= -o tid= | awk '$2 == 792 print $1'
On Linux:
$ readlink -f /proc/*/task/792/../..
/proc/300
Or with zsh:
$ echo /proc/*/task/792(:h:h:t)
300
answered Mar 15 at 16:58
Stéphane Chazelas
280k53515847
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
5
down vote
accepted
You can always do:
ps -eLo pid= -o tid= | awk '$2 == 792 print $1'
On Linux:
$ readlink -f /proc/*/task/792/../..
/proc/300
Or with zsh:
$ echo /proc/*/task/792(:h:h:t)
300
answered Mar 15 at 16:58
Stéphane Chazelas
280k53515847
add a comment |Â
up vote
5
down vote
accepted
You can always do:
ps -eLo pid= -o tid= | awk '$2 == 792 print $1'
On Linux:
$ readlink -f /proc/*/task/792/../..
/proc/300
Or with zsh:
$ echo /proc/*/task/792(:h:h:t)
300
answered Mar 15 at 16:58
Stéphane Chazelas
280k53515847
add a comment |Â
up vote
5
down vote
accepted
up vote
5
down vote
accepted
You can always do:
ps -eLo pid= -o tid= | awk '$2 == 792 print $1'
On Linux:
$ readlink -f /proc/*/task/792/../..
/proc/300
Or with zsh:
$ echo /proc/*/task/792(:h:h:t)
300
answered Mar 15 at 16:58
Stéphane Chazelas
280k53515847
You can always do:
ps -eLo pid= -o tid= | awk '$2 == 792 print $1'
On Linux:
$ readlink -f /proc/*/task/792/../..
/proc/300
Or with zsh:
$ echo /proc/*/task/792(:h:h:t)
300
answered Mar 15 at 16:58
Stéphane Chazelas
280k53515847
answered Mar 15 at 16:58
Stéphane Chazelas
280k53515847
answered Mar 15 at 16:58
Stéphane Chazelas
280k53515847
answered Mar 15 at 16:58
Stéphane Chazelas
280k53515847
280k53515847
add a comment |Â
add a comment |Â
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