SYSSTAT -CONTEXTSWITCH


 
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# 1  
Old 09-21-2012
SYSSTAT -CONTEXTSWITCH

Hi,
do you know this command line :

Code:
SYSSTAT -CONTEXTSWITCH

And what it does ?
Thank you.
# 2  
Old 09-21-2012
systat is an open source Solaris tool with a formatted report, but the information such as context switches it provides is also provided on native commands like sar.

sysstat utility

SYSSTAT

cswch/s
Total number of voluntary context switches the task made per second. A voluntary context switch occurs when a task blocks because it requires a resource that is unavailable.

nvcswch/s
Total number of non voluntary context switches the task made per second. A involuntary context switch takes place when a task executes for the duration of its time slice and then is forced to relinquish the processor.

The sar -w provides this:
Code:
           -w    Report system swapping and switching activity:
                     swpin/s        Number of process swapins per second;
                     swpot/s        Number of process swapouts per second;
                     bswin/s        Number of 512-byte units transferred for
                                    swapins per second;
                     bswot/s        Number of 512-byte units transferred for
                                    swapouts per second;
                     pswch/s        Number of process context switches per
                                    second.
 
$ sar -w
HP-UX mymsysnam B.11.00 U 9000/800    09/21/12
00:00:00 swpin/s bswin/s swpot/s bswot/s pswch/s
00:15:00    0.00     0.0    0.00     0.0     858
00:30:00    0.00     0.0    0.00     0.0     833
00:45:00    0.00     0.0    0.00     0.0     824
01:00:00    0.00     0.0    0.00     0.0     818
01:15:01    0.00     0.0    0.00     0.0    2769
01:30:01    0.00     0.0    0.00     0.0    1144
01:45:00    0.00     0.0    0.00     0.0     821
02:00:00    0.00     0.0    0.00     0.0    2200
02:15:00    0.00     0.0    0.00     0.0     868
02:30:00    0.00     0.0    0.00     0.0     834
02:45:00    0.00     0.0    0.00     0.0     823
03:00:00    0.00     0.0    0.00     0.0     827
03:15:00    0.00     0.0    0.00     0.0     845
03:30:00    0.00     0.0    0.00     0.0     815
03:45:00    0.00     0.0    0.00     0.0     819
04:00:00    0.00     0.0    0.00     0.0     817
04:15:00    0.00     0.0    0.00     0.0     876
04:30:00    0.00     0.0    0.00     0.0     821
04:45:01    0.00     0.0    0.00     0.0     816
05:00:00    0.00     0.0    0.00     0.0     826
05:15:00    0.00     0.0    0.00     0.0     850
05:30:00    0.00     0.0    0.00     0.0     817
05:45:00    0.00     0.0    0.00     0.0     825
06:00:00    0.00     0.0    0.00     0.0     838
06:15:01    0.00     0.0    0.00     0.0     855
06:30:00    0.00     0.0    0.00     0.0     844
06:45:00    0.00     0.0    0.00     0.0     831
07:00:00    0.00     0.0    0.00     0.0     884
07:15:00    0.00     0.0    0.00     0.0     852
07:30:00    0.00     0.0    0.00     0.0     821
07:45:00    0.00     0.0    0.00     0.0     825
08:00:00    0.00     0.0    0.00     0.0     846
08:15:00    0.00     0.0    0.00     0.0    2174
08:30:01    0.00     0.0    0.00     0.0    2047
08:45:00    0.00     0.0    0.00     0.0    1500
09:00:00    0.00     0.0    0.00     0.0    1565
09:15:00    0.00     0.0    0.00     0.0    1067
09:30:01    0.00     0.0    0.00     0.0     862
09:45:00    0.00     0.0    0.00     0.0    2400
10:00:00    0.00     0.0    0.00     0.0    2181
Average     0.00     0.0    0.00     0.0    1103
$


Last edited by DGPickett; 09-21-2012 at 11:12 AM..
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