I would like to clearly understand the output of the mpstat command. What is the mutex spins and also context switches? What if we saw that the number of mutex spins is high. Basically, what to look for in the output of the mpstat command? What is wrong and what is ok. what is the value under the smtx will reveal us. Please see below an example output
Last edited by pludi; 04-25-2010 at 12:46 PM..
Reason: code tags, please...
Hi,
I am trying to take the Statistics of the machine during load.Can someone explian the parameters of
iostat:
tty sd1 sd2 sd3 sd4 cpu
tin tout kps tps serv kps tps serv kps tps serv kps tps serv us sy wt id
vmstat:
kthr ... (1 Reply)
All:
I have a V445 server with four IIIi CPUs and 8 GB RAM running Solaris 10 and an Oracle database along with some app server components and we have had some performance issues - so I collected some VMSTAT and MPSTAT data over the course of three days with a 15-minute polling interval.
I... (1 Reply)
I have a number of LPARs on one P520. All LPARs are running 5.3 and I observe the following:
On some LPARs the number of CPUs found do not match between topas and mpstat.
Server 1:
$ mpstat
System configuration: lcpu=4 ent=0.2 mode=Uncapped
cpu min maj mpc int cs ics rq ... (1 Reply)
HI I ma using mpstat and sar commands to check the cpu utilisation
but the results are not matching .I dont understand why thisis happening?
$ sar -u 12 5
Linux 2.6.9-89.35.1.ELhugemem (abcd.efgh.com) 03/07/2013
02:43:16 AM CPU %user %nice %system %iowait %idle... (1 Reply)
HI ,
I am wrirting a script for checking the performance monitoring on Linux System when my application is running.
I have to run a test for 30 minutes on some server and while the test is running i have to capture the perfromance metrics of Linux through vmstat , sar, mpstat, free.
here is the... (3 Replies)
hi everyone,
We've generated mpstat.out file monitoring cpu utilization and the file is ready now.Wanted to generate graphical charts for the same output data.
Can anyone pleas suggest tool for the same.? (1 Reply)
I have a script which runs the mpstat and prints the output in a file. In order capture highest cpu ususage from the generated output file,
have to manually tail the output file and need to grab which cpu has highest value (which is very annoying)
Is there a way we can automate that process of... (3 Replies)
I want to get average idle time of the server using mpstat. The problem I am having is %idle is not in same columns in all the versions of linux.
example 1:
example 2:
I tried below command as generalized solution but as Average as one less column output is not proper.
I am... (1 Reply)
Discussion started by: kumarjohn
1 Replies
LEARN ABOUT SUNOS
mpstat
mpstat(1M)mpstat(1M)NAME
mpstat - report per-processor or per-processor-set statistics
SYNOPSIS
/usr/bin/mpstat [-aq] [-p | -P set] [interval [count]]
The mpstat command reports processor statistics in tabular form. Each row of the table represents the activity of one processor. The first
table summarizes all activity since boot. Each subsequent table summarizes activity for the preceding interval. All values are rates listed
as events per second unless otherwise noted.
During execution of the kernel status command, the state of the kernel can change. If relevant, a state change message is included in the
mpstat output, in one of the following forms:
<<processor 3 moved from pset: -1 to: 1>>
<<pset destroyed: 1>>
<<pset created: 1>>
<<processors added: 1, 3>>
<<processors removed: 1, 3>>
The mpstat command reports the following information:
CPU or SET Without the -a option, mpstat reports CPU statistics for a processor ID. With the -a option, mpstat reports SET statistics
for a processor set ID.
minf minor faults
mjf major faults
xcal inter-processor cross-calls
intr interrupts
ithr interrupts as threads (not counting clock interrupt)
csw context switches
icsw involuntary context switches
migr thread migrations (to another processor)
smtx spins on mutexes (lock not acquired on first try)
srw spins on readers/writer locks (lock not acquired on first try)
syscl system calls
usr percent user time
sys percent system time
wt the I/O wait time is no longer calculated as a percentage of CPU time, and this statistic will always return zero.
idl percent idle time
sze number of processors in the requested processor set
set processor set membership of each CPU
The following options are supported:
-a Aggregate output by processor set. Sort the output by set. The default output is sorted by CPU number.
-p Report processor set membership of each CPU. Sort the output by set. The default output is sorted by CPU number.
-P set Display only those processors in the specified set.
-q Suppress messages related to state changes.
interval Report once each interval seconds.
count Only print count reports.
Example 1: Using mpstat to Generate User and System Operation Statistics
The following command generates processor statistics over a five-second interval in two reports. The command shows the processor set mem-
bership of each CPU. The default output is sorted by CPU number, aggregated by processor set, for user (usr) and system (sys) operations.
example% mpstat -ap 5 2
SET minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl sze
0 6 0 355 291 190 22 0 0 0 0 43 0 2 0 43 1
1 24 17 534 207 200 70 1 0 2 0 600 4 1 0 84 2
2 19 7 353 325 318 44 0 0 5 0 345 1 1 0 94 3
3 36 2 149 237 236 14 0 0 4 0 97 0 0 0 98 2
SET minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl sze
0 1 0 720 405 304 55 0 0 18 0 12 0 15 0 81 1
1 0 69 1955 230 200 313 33 4 41 9 7086 34 10 0 19 2
2 0 46 685 314 300 203 11 0 54 1 5287 36 6 0 28 3
3 0 0 14 386 384 0 0 0 0 0 0 0 0 0 100 2
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|Interface Stability |See below. |
+-----------------------------+-----------------------------+
Invocation is evolving. Human readable output is unstable.
sar(1), iostat(1M), sar(1M), vmstat(1M), attributes(5)
The sum of CPU utilization might vary slightly from 100 due to rounding errors in the production of a percentage figure.
The total time used for CPU processing is the sum of usr and sys output values, reported for user and system operations. The idl value
reports the time that the CPU is idle for any reason other than pending disk I/O operations.
Run the iostat command with the -x option to report I/O service times in svc_t output. The iostat utility also reports the same wt, user
(us), and system (sy) statistics. See iostat(1M) for more information.
When executing in a zone and if the pools facility is active, mpstat(1M) will only provide information for those processors which are a
member of the processor set of the pool to which the zone is bound.
29 Jun 2005 mpstat(1M)