On Linux, how to tell how many cores of the machine are active?
On Linux, how to tell how many cores of the machine are active? I assume a test for this would work for Android too.
I need to know if more than one core is ever active. Was wondering to test this by having a process create many threads. Is it possible for a thread to query which processor it is on? that way one can tell if multiple cores will ever be used under heavy load. Not sure if I am on the right track.
linux core
asked Jan 24 '11 at 22:32
likejudolikejudo
166115
migrated from stackoverflow.com Jan 25 '11 at 3:17
This question came from our site for professional and enthusiast programmers.
add a comment |
On Linux, how to tell how many cores of the machine are active? I assume a test for this would work for Android too.
I need to know if more than one core is ever active. Was wondering to test this by having a process create many threads. Is it possible for a thread to query which processor it is on? that way one can tell if multiple cores will ever be used under heavy load. Not sure if I am on the right track.
linux core
asked Jan 24 '11 at 22:32
likejudolikejudo
166115
migrated from stackoverflow.com Jan 25 '11 at 3:17
This question came from our site for professional and enthusiast programmers.
By "active", I assume you mean how many cores are currently in use? Or do you mean how many cores the system has?
– Mikel
Jan 24 '11 at 22:40
yes, I would like to tell how many are currently in use
– Anil
Jan 24 '11 at 22:43
add a comment |
On Linux, how to tell how many cores of the machine are active? I assume a test for this would work for Android too.
I need to know if more than one core is ever active. Was wondering to test this by having a process create many threads. Is it possible for a thread to query which processor it is on? that way one can tell if multiple cores will ever be used under heavy load. Not sure if I am on the right track.
linux core
asked Jan 24 '11 at 22:32
likejudolikejudo
166115
On Linux, how to tell how many cores of the machine are active? I assume a test for this would work for Android too.
I need to know if more than one core is ever active. Was wondering to test this by having a process create many threads. Is it possible for a thread to query which processor it is on? that way one can tell if multiple cores will ever be used under heavy load. Not sure if I am on the right track.
linux core
linux core
asked Jan 24 '11 at 22:32
likejudolikejudo
166115
asked Jan 24 '11 at 22:32
likejudolikejudo
166115
asked Jan 24 '11 at 22:32
likejudolikejudo
166115
asked Jan 24 '11 at 22:32
likejudolikejudo
166115
asked Jan 24 '11 at 22:32
likejudolikejudo
166115
166115
migrated from stackoverflow.com Jan 25 '11 at 3:17
This question came from our site for professional and enthusiast programmers.
migrated from stackoverflow.com Jan 25 '11 at 3:17
This question came from our site for professional and enthusiast programmers.
By "active", I assume you mean how many cores are currently in use? Or do you mean how many cores the system has?
– Mikel
Jan 24 '11 at 22:40
yes, I would like to tell how many are currently in use
– Anil
Jan 24 '11 at 22:43
add a comment |
By "active", I assume you mean how many cores are currently in use? Or do you mean how many cores the system has?
– Mikel
Jan 24 '11 at 22:40
yes, I would like to tell how many are currently in use
– Anil
Jan 24 '11 at 22:43
By "active", I assume you mean how many cores are currently in use? Or do you mean how many cores the system has?
– Mikel
Jan 24 '11 at 22:40
By "active", I assume you mean how many cores are currently in use? Or do you mean how many cores the system has?
– Mikel
Jan 24 '11 at 22:40
yes, I would like to tell how many are currently in use
– Anil
Jan 24 '11 at 22:43
yes, I would like to tell how many are currently in use
– Anil
Jan 24 '11 at 22:43
add a comment |
5 Answers
5
active
oldest
votes
You can use top to list the utilization of each core. Press 1 if necessary to split the CPU row into a separate row for each core.
You can also add a column that shows the last-used core for each process. Press f to bring up the field list, then j to activate the "P" column. Then press space to return to the live view.
answered Jan 25 '11 at 3:38
BrianBrian
909519
So perhaps I should write and run a program that spawns many threads and then run the 'top' command in the console?
– likejudo
Jan 25 '11 at 17:36
I think that should work. Just press H when you're intopto list threads separately. Or you could write a program with an infinite loop and run it a bunch of times.
– Brian
Jan 25 '11 at 21:00
Say, I write the program to spawn 100 threads, each one performing some long, intensive computation. If I write it in Java (Android), is there a guarantee that the JVM/KVM will run the threads on different cores, and run them on all the cores?
– likejudo
Jan 25 '11 at 22:15
1
I don't know - isn't that what your experiment is supposed to figure out?
– Brian
Jan 25 '11 at 22:28
I need to test a program that says it will restrict the number of processor cores being used. I shall search some more. thanks!
– likejudo
Jan 25 '11 at 23:37
add a comment |
ps has a field called psr to tell you which processor a job is running on.
So you could use something like:
ps -e -o psr= | sort | uniq | wc -l
Note that merely running ps like this will of course make at least one core active.
Probably better is to run this:
tmp=/tmp/ps.$$
ps -e -o psr= > /tmp/ps.$$
sort -u "$tmp" | wc -l
rm "$tmp"
that way the sort and wc do not increase the count.
answered Jan 24 '11 at 22:34
MikelMikel
7,58913435
What if system has 16 cores and nobody is using some of them?
– Elalfer
Jan 24 '11 at 22:44
Then it prints 0 because none of them are in use. I think that is what the question is asking for.
– Mikel
Jan 24 '11 at 22:45
Didn't see new comments to the question.
– Elalfer
Jan 24 '11 at 22:47
1
Of course, by runningpswe are making at least 1 core active. ;-)
– Mikel
Jan 24 '11 at 22:51
Thanks for your answer. The disadvantage is I need to know if more than one core is ever active. Was wondering to test this by having a process create many threads. Is it possible for a thread to query which processor it is on? that way one can tell if multiple cores will ever be used under heavy load. Not sure if I am on the right track.
– Anil
Jan 24 '11 at 22:57
add a comment |
Try the following:
cat /proc/cpuinfo
Here's a link to an Android Java example.
answered Jan 24 '11 at 22:34
Amir AfghaniAmir Afghani
248138
1
By "active", I assume Anil means how many cores are currently in use, and how many are idle, i.e. an approximation of how busy the system is./proc/cpuinfojust tells you how many cores the system has, and even you would have to do more thancat /proc/cpuinfoto account for HyperThreading.
– Mikel
Jan 24 '11 at 22:38
OK - that wasn't clear but you're right.
– Amir Afghani
Jan 24 '11 at 22:49
add a comment |
htop
This command works good in both ubuntu and centos and shows graphically how many CPUs and how are they being used.
for centos:
yum install htop
for ubuntu:
apt-get install htop
answered Dec 21 '16 at 15:44
Srihari KaranthSrihari Karanth
1212
add a comment |
You can use cat /sys/devices/system/cpu/possible or cat /sys/devices/system/cpu/online. Possible is mainly incase you have isolated a cpu to run some particular program.
answered Feb 28 at 14:00
SabsterSabster
11
add a comment |
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5 Answers
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active
oldest
votes
5 Answers
5
active
oldest
votes
active
oldest
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oldest
votes
You can use top to list the utilization of each core. Press 1 if necessary to split the CPU row into a separate row for each core.
You can also add a column that shows the last-used core for each process. Press f to bring up the field list, then j to activate the "P" column. Then press space to return to the live view.
answered Jan 25 '11 at 3:38
BrianBrian
909519
So perhaps I should write and run a program that spawns many threads and then run the 'top' command in the console?
– likejudo
Jan 25 '11 at 17:36
I think that should work. Just press H when you're intopto list threads separately. Or you could write a program with an infinite loop and run it a bunch of times.
– Brian
Jan 25 '11 at 21:00
Say, I write the program to spawn 100 threads, each one performing some long, intensive computation. If I write it in Java (Android), is there a guarantee that the JVM/KVM will run the threads on different cores, and run them on all the cores?
– likejudo
Jan 25 '11 at 22:15
1
I don't know - isn't that what your experiment is supposed to figure out?
– Brian
Jan 25 '11 at 22:28
I need to test a program that says it will restrict the number of processor cores being used. I shall search some more. thanks!
– likejudo
Jan 25 '11 at 23:37
add a comment |
You can use top to list the utilization of each core. Press 1 if necessary to split the CPU row into a separate row for each core.
You can also add a column that shows the last-used core for each process. Press f to bring up the field list, then j to activate the "P" column. Then press space to return to the live view.
answered Jan 25 '11 at 3:38
BrianBrian
909519
So perhaps I should write and run a program that spawns many threads and then run the 'top' command in the console?
– likejudo
Jan 25 '11 at 17:36
I think that should work. Just press H when you're intopto list threads separately. Or you could write a program with an infinite loop and run it a bunch of times.
– Brian
Jan 25 '11 at 21:00
Say, I write the program to spawn 100 threads, each one performing some long, intensive computation. If I write it in Java (Android), is there a guarantee that the JVM/KVM will run the threads on different cores, and run them on all the cores?
– likejudo
Jan 25 '11 at 22:15
1
I don't know - isn't that what your experiment is supposed to figure out?
– Brian
Jan 25 '11 at 22:28
I need to test a program that says it will restrict the number of processor cores being used. I shall search some more. thanks!
– likejudo
Jan 25 '11 at 23:37
add a comment |
You can use top to list the utilization of each core. Press 1 if necessary to split the CPU row into a separate row for each core.
You can also add a column that shows the last-used core for each process. Press f to bring up the field list, then j to activate the "P" column. Then press space to return to the live view.
answered Jan 25 '11 at 3:38
BrianBrian
909519
You can use top to list the utilization of each core. Press 1 if necessary to split the CPU row into a separate row for each core.
You can also add a column that shows the last-used core for each process. Press f to bring up the field list, then j to activate the "P" column. Then press space to return to the live view.
answered Jan 25 '11 at 3:38
BrianBrian
909519
answered Jan 25 '11 at 3:38
BrianBrian
909519
answered Jan 25 '11 at 3:38
BrianBrian
909519
answered Jan 25 '11 at 3:38
BrianBrian
909519
909519
So perhaps I should write and run a program that spawns many threads and then run the 'top' command in the console?
– likejudo
Jan 25 '11 at 17:36
I think that should work. Just press H when you're intopto list threads separately. Or you could write a program with an infinite loop and run it a bunch of times.
– Brian
Jan 25 '11 at 21:00
Say, I write the program to spawn 100 threads, each one performing some long, intensive computation. If I write it in Java (Android), is there a guarantee that the JVM/KVM will run the threads on different cores, and run them on all the cores?
– likejudo
Jan 25 '11 at 22:15
1
I don't know - isn't that what your experiment is supposed to figure out?
– Brian
Jan 25 '11 at 22:28
I need to test a program that says it will restrict the number of processor cores being used. I shall search some more. thanks!
– likejudo
Jan 25 '11 at 23:37
add a comment |
So perhaps I should write and run a program that spawns many threads and then run the 'top' command in the console?
– likejudo
Jan 25 '11 at 17:36
I think that should work. Just press H when you're intopto list threads separately. Or you could write a program with an infinite loop and run it a bunch of times.
– Brian
Jan 25 '11 at 21:00
Say, I write the program to spawn 100 threads, each one performing some long, intensive computation. If I write it in Java (Android), is there a guarantee that the JVM/KVM will run the threads on different cores, and run them on all the cores?
– likejudo
Jan 25 '11 at 22:15
1
I don't know - isn't that what your experiment is supposed to figure out?
– Brian
Jan 25 '11 at 22:28
I need to test a program that says it will restrict the number of processor cores being used. I shall search some more. thanks!
– likejudo
Jan 25 '11 at 23:37
So perhaps I should write and run a program that spawns many threads and then run the 'top' command in the console?
– likejudo
Jan 25 '11 at 17:36
So perhaps I should write and run a program that spawns many threads and then run the 'top' command in the console?
– likejudo
Jan 25 '11 at 17:36
I think that should work. Just press H when you're in
top to list threads separately. Or you could write a program with an infinite loop and run it a bunch of times.– Brian
Jan 25 '11 at 21:00
I think that should work. Just press H when you're in
top to list threads separately. Or you could write a program with an infinite loop and run it a bunch of times.– Brian
Jan 25 '11 at 21:00
Say, I write the program to spawn 100 threads, each one performing some long, intensive computation. If I write it in Java (Android), is there a guarantee that the JVM/KVM will run the threads on different cores, and run them on all the cores?
– likejudo
Jan 25 '11 at 22:15
Say, I write the program to spawn 100 threads, each one performing some long, intensive computation. If I write it in Java (Android), is there a guarantee that the JVM/KVM will run the threads on different cores, and run them on all the cores?
– likejudo
Jan 25 '11 at 22:15
1
1
I don't know - isn't that what your experiment is supposed to figure out?
– Brian
Jan 25 '11 at 22:28
I don't know - isn't that what your experiment is supposed to figure out?
– Brian
Jan 25 '11 at 22:28
I need to test a program that says it will restrict the number of processor cores being used. I shall search some more. thanks!
– likejudo
Jan 25 '11 at 23:37
I need to test a program that says it will restrict the number of processor cores being used. I shall search some more. thanks!
– likejudo
Jan 25 '11 at 23:37
add a comment |
ps has a field called psr to tell you which processor a job is running on.
So you could use something like:
ps -e -o psr= | sort | uniq | wc -l
Note that merely running ps like this will of course make at least one core active.
Probably better is to run this:
tmp=/tmp/ps.$$
ps -e -o psr= > /tmp/ps.$$
sort -u "$tmp" | wc -l
rm "$tmp"
that way the sort and wc do not increase the count.
answered Jan 24 '11 at 22:34
MikelMikel
7,58913435
What if system has 16 cores and nobody is using some of them?
– Elalfer
Jan 24 '11 at 22:44
Then it prints 0 because none of them are in use. I think that is what the question is asking for.
– Mikel
Jan 24 '11 at 22:45
Didn't see new comments to the question.
– Elalfer
Jan 24 '11 at 22:47
1
Of course, by runningpswe are making at least 1 core active. ;-)
– Mikel
Jan 24 '11 at 22:51
Thanks for your answer. The disadvantage is I need to know if more than one core is ever active. Was wondering to test this by having a process create many threads. Is it possible for a thread to query which processor it is on? that way one can tell if multiple cores will ever be used under heavy load. Not sure if I am on the right track.
– Anil
Jan 24 '11 at 22:57
add a comment |
ps has a field called psr to tell you which processor a job is running on.
So you could use something like:
ps -e -o psr= | sort | uniq | wc -l
Note that merely running ps like this will of course make at least one core active.
Probably better is to run this:
tmp=/tmp/ps.$$
ps -e -o psr= > /tmp/ps.$$
sort -u "$tmp" | wc -l
rm "$tmp"
that way the sort and wc do not increase the count.
answered Jan 24 '11 at 22:34
MikelMikel
7,58913435
What if system has 16 cores and nobody is using some of them?
– Elalfer
Jan 24 '11 at 22:44
Then it prints 0 because none of them are in use. I think that is what the question is asking for.
– Mikel
Jan 24 '11 at 22:45
Didn't see new comments to the question.
– Elalfer
Jan 24 '11 at 22:47
1
Of course, by runningpswe are making at least 1 core active. ;-)
– Mikel
Jan 24 '11 at 22:51
Thanks for your answer. The disadvantage is I need to know if more than one core is ever active. Was wondering to test this by having a process create many threads. Is it possible for a thread to query which processor it is on? that way one can tell if multiple cores will ever be used under heavy load. Not sure if I am on the right track.
– Anil
Jan 24 '11 at 22:57
add a comment |
ps has a field called psr to tell you which processor a job is running on.
So you could use something like:
ps -e -o psr= | sort | uniq | wc -l
Note that merely running ps like this will of course make at least one core active.
Probably better is to run this:
tmp=/tmp/ps.$$
ps -e -o psr= > /tmp/ps.$$
sort -u "$tmp" | wc -l
rm "$tmp"
that way the sort and wc do not increase the count.
answered Jan 24 '11 at 22:34
MikelMikel
7,58913435
ps has a field called psr to tell you which processor a job is running on.
So you could use something like:
ps -e -o psr= | sort | uniq | wc -l
Note that merely running ps like this will of course make at least one core active.
Probably better is to run this:
tmp=/tmp/ps.$$
ps -e -o psr= > /tmp/ps.$$
sort -u "$tmp" | wc -l
rm "$tmp"
that way the sort and wc do not increase the count.
answered Jan 24 '11 at 22:34
MikelMikel
7,58913435
answered Jan 24 '11 at 22:34
MikelMikel
7,58913435
answered Jan 24 '11 at 22:34
MikelMikel
7,58913435
answered Jan 24 '11 at 22:34
MikelMikel
7,58913435
7,58913435
What if system has 16 cores and nobody is using some of them?
– Elalfer
Jan 24 '11 at 22:44
Then it prints 0 because none of them are in use. I think that is what the question is asking for.
– Mikel
Jan 24 '11 at 22:45
Didn't see new comments to the question.
– Elalfer
Jan 24 '11 at 22:47
1
Of course, by runningpswe are making at least 1 core active. ;-)
– Mikel
Jan 24 '11 at 22:51
Thanks for your answer. The disadvantage is I need to know if more than one core is ever active. Was wondering to test this by having a process create many threads. Is it possible for a thread to query which processor it is on? that way one can tell if multiple cores will ever be used under heavy load. Not sure if I am on the right track.
– Anil
Jan 24 '11 at 22:57
add a comment |
What if system has 16 cores and nobody is using some of them?
– Elalfer
Jan 24 '11 at 22:44
Then it prints 0 because none of them are in use. I think that is what the question is asking for.
– Mikel
Jan 24 '11 at 22:45
Didn't see new comments to the question.
– Elalfer
Jan 24 '11 at 22:47
1
Of course, by runningpswe are making at least 1 core active. ;-)
– Mikel
Jan 24 '11 at 22:51
Thanks for your answer. The disadvantage is I need to know if more than one core is ever active. Was wondering to test this by having a process create many threads. Is it possible for a thread to query which processor it is on? that way one can tell if multiple cores will ever be used under heavy load. Not sure if I am on the right track.
– Anil
Jan 24 '11 at 22:57
What if system has 16 cores and nobody is using some of them?
– Elalfer
Jan 24 '11 at 22:44
What if system has 16 cores and nobody is using some of them?
– Elalfer
Jan 24 '11 at 22:44
Then it prints 0 because none of them are in use. I think that is what the question is asking for.
– Mikel
Jan 24 '11 at 22:45
Then it prints 0 because none of them are in use. I think that is what the question is asking for.
– Mikel
Jan 24 '11 at 22:45
Didn't see new comments to the question.
– Elalfer
Jan 24 '11 at 22:47
Didn't see new comments to the question.
– Elalfer
Jan 24 '11 at 22:47
1
1
Of course, by running
ps we are making at least 1 core active. ;-)– Mikel
Jan 24 '11 at 22:51
Of course, by running
ps we are making at least 1 core active. ;-)– Mikel
Jan 24 '11 at 22:51
Thanks for your answer. The disadvantage is I need to know if more than one core is ever active. Was wondering to test this by having a process create many threads. Is it possible for a thread to query which processor it is on? that way one can tell if multiple cores will ever be used under heavy load. Not sure if I am on the right track.
– Anil
Jan 24 '11 at 22:57
Thanks for your answer. The disadvantage is I need to know if more than one core is ever active. Was wondering to test this by having a process create many threads. Is it possible for a thread to query which processor it is on? that way one can tell if multiple cores will ever be used under heavy load. Not sure if I am on the right track.
– Anil
Jan 24 '11 at 22:57
add a comment |
Try the following:
cat /proc/cpuinfo
Here's a link to an Android Java example.
answered Jan 24 '11 at 22:34
Amir AfghaniAmir Afghani
248138
1
By "active", I assume Anil means how many cores are currently in use, and how many are idle, i.e. an approximation of how busy the system is./proc/cpuinfojust tells you how many cores the system has, and even you would have to do more thancat /proc/cpuinfoto account for HyperThreading.
– Mikel
Jan 24 '11 at 22:38
OK - that wasn't clear but you're right.
– Amir Afghani
Jan 24 '11 at 22:49
add a comment |
Try the following:
cat /proc/cpuinfo
Here's a link to an Android Java example.
answered Jan 24 '11 at 22:34
Amir AfghaniAmir Afghani
248138
1
By "active", I assume Anil means how many cores are currently in use, and how many are idle, i.e. an approximation of how busy the system is./proc/cpuinfojust tells you how many cores the system has, and even you would have to do more thancat /proc/cpuinfoto account for HyperThreading.
– Mikel
Jan 24 '11 at 22:38
OK - that wasn't clear but you're right.
– Amir Afghani
Jan 24 '11 at 22:49
add a comment |
Try the following:
cat /proc/cpuinfo
Here's a link to an Android Java example.
answered Jan 24 '11 at 22:34
Amir AfghaniAmir Afghani
248138
Try the following:
cat /proc/cpuinfo
Here's a link to an Android Java example.
answered Jan 24 '11 at 22:34
Amir AfghaniAmir Afghani
248138
answered Jan 24 '11 at 22:34
Amir AfghaniAmir Afghani
248138
answered Jan 24 '11 at 22:34
Amir AfghaniAmir Afghani
248138
answered Jan 24 '11 at 22:34
Amir AfghaniAmir Afghani
248138
248138
1
By "active", I assume Anil means how many cores are currently in use, and how many are idle, i.e. an approximation of how busy the system is./proc/cpuinfojust tells you how many cores the system has, and even you would have to do more thancat /proc/cpuinfoto account for HyperThreading.
– Mikel
Jan 24 '11 at 22:38
OK - that wasn't clear but you're right.
– Amir Afghani
Jan 24 '11 at 22:49
add a comment |
1
By "active", I assume Anil means how many cores are currently in use, and how many are idle, i.e. an approximation of how busy the system is./proc/cpuinfojust tells you how many cores the system has, and even you would have to do more thancat /proc/cpuinfoto account for HyperThreading.
– Mikel
Jan 24 '11 at 22:38
OK - that wasn't clear but you're right.
– Amir Afghani
Jan 24 '11 at 22:49
1
1
By "active", I assume Anil means how many cores are currently in use, and how many are idle, i.e. an approximation of how busy the system is.
/proc/cpuinfo just tells you how many cores the system has, and even you would have to do more than cat /proc/cpuinfo to account for HyperThreading.– Mikel
Jan 24 '11 at 22:38
By "active", I assume Anil means how many cores are currently in use, and how many are idle, i.e. an approximation of how busy the system is.
/proc/cpuinfo just tells you how many cores the system has, and even you would have to do more than cat /proc/cpuinfo to account for HyperThreading.– Mikel
Jan 24 '11 at 22:38
OK - that wasn't clear but you're right.
– Amir Afghani
Jan 24 '11 at 22:49
OK - that wasn't clear but you're right.
– Amir Afghani
Jan 24 '11 at 22:49
add a comment |
htop
This command works good in both ubuntu and centos and shows graphically how many CPUs and how are they being used.
for centos:
yum install htop
for ubuntu:
apt-get install htop
answered Dec 21 '16 at 15:44
Srihari KaranthSrihari Karanth
1212
add a comment |
htop
This command works good in both ubuntu and centos and shows graphically how many CPUs and how are they being used.
for centos:
yum install htop
for ubuntu:
apt-get install htop
answered Dec 21 '16 at 15:44
Srihari KaranthSrihari Karanth
1212
add a comment |
htop
This command works good in both ubuntu and centos and shows graphically how many CPUs and how are they being used.
for centos:
yum install htop
for ubuntu:
apt-get install htop
answered Dec 21 '16 at 15:44
Srihari KaranthSrihari Karanth
1212
htop
This command works good in both ubuntu and centos and shows graphically how many CPUs and how are they being used.
for centos:
yum install htop
for ubuntu:
apt-get install htop
answered Dec 21 '16 at 15:44
Srihari KaranthSrihari Karanth
1212
answered Dec 21 '16 at 15:44
Srihari KaranthSrihari Karanth
1212
answered Dec 21 '16 at 15:44
Srihari KaranthSrihari Karanth
1212
answered Dec 21 '16 at 15:44
Srihari KaranthSrihari Karanth
1212
1212
add a comment |
add a comment |
You can use cat /sys/devices/system/cpu/possible or cat /sys/devices/system/cpu/online. Possible is mainly incase you have isolated a cpu to run some particular program.
answered Feb 28 at 14:00
SabsterSabster
11
add a comment |
You can use cat /sys/devices/system/cpu/possible or cat /sys/devices/system/cpu/online. Possible is mainly incase you have isolated a cpu to run some particular program.
answered Feb 28 at 14:00
SabsterSabster
11
add a comment |
You can use cat /sys/devices/system/cpu/possible or cat /sys/devices/system/cpu/online. Possible is mainly incase you have isolated a cpu to run some particular program.
answered Feb 28 at 14:00
SabsterSabster
11
You can use cat /sys/devices/system/cpu/possible or cat /sys/devices/system/cpu/online. Possible is mainly incase you have isolated a cpu to run some particular program.
answered Feb 28 at 14:00
SabsterSabster
11
answered Feb 28 at 14:00
SabsterSabster
11
answered Feb 28 at 14:00
SabsterSabster
11
answered Feb 28 at 14:00
SabsterSabster
11
11
add a comment |
add a comment |
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By "active", I assume you mean how many cores are currently in use? Or do you mean how many cores the system has?
– Mikel
Jan 24 '11 at 22:40
yes, I would like to tell how many are currently in use
– Anil
Jan 24 '11 at 22:43