pgstat(1M) System Administration Commands pgstat(1M)NAMEpgstat - report utilization statistics for Processor Groups
SYNOPSISpgstat [-A] [-C] [-p] [-s key | -S key] [-t number] [-T u | d] [-v]
[-r string] [-R string] [-P pg ...] [-c processor_id... ]
[interval [count]]
pgstat-h
DESCRIPTION
The pgstat displays utilization statistics about Processor Groups
(PGs). A PG is a set of CPUs that are grouped together by a common
characteristic.
PGs are used by the operating system to represent CPUs that share per‐
formance relevant hardware, such as execution pipelines, caches, and
so forth. These PGs are organized into a hierarchy that models the pro‐
cessor topology of the machine. In this hierarchy, each CPU (strand)
has a leaf PG that represents the CPUs that share the most hardware
with it. Each successive ancestor of the leaf PG shares progressively
less hardware with the CPU until the root PG is reached. The root PG
contains all of the CPUs in the system and represents the group of CPUs
sharing the least hardware with each other. (See "Examples" below for
an example of PG hierarchy).
If a machine does not have any performance-relevant hardware sharing
relationships, then pgstat displays only a root PG that contains all of
the CPUs in the system.
By default, pgstat does the following:
o Measures the hardware and software utilization of all PGs in
the PG hierarchy over a one second interval.
o Displays the utilization of the PGs in depth first order
using indentation to help show how the PGs relate to each
other.
o Displays the ID, sharing relationship, hardware load, soft‐
ware load, and online CPUs for each PG at the end of each
interval.
The interval and count can be given as arguments to specify the number
of seconds in the sampling interval and number of times to measure and
display the utilization for the specified PGs.
You can specify options to further tailor the output, organize the out‐
put a certain way, and specify PGs of interest (see "Options" below for
details).
A hyphen ("-") is displayed when the utilization for a given PG is not
supported and a question mark (?) is displayed when the utilization is
not available. On systems where the CPU hardware performance counters
are needed to measure the hardware utilization, the hardware utiliza‐
tion might be unavailable because the counters are being used by a
cpc(3CPC) consumer such as cpustat(1M), cputrack(1), dtrace(1M), or
another application that uses libcpc(3LIB).
OPTIONS
The following options are supported:
-A
Display summary of utilization data when pgstat is run over multi‐
ple intervals.
-c processor_id...
Display utilization about PGs that contain the specified CPUs. The
CPUs can be specified as a comma separated list of CPU IDs. A
hyphen ("-") can be used to specify contiguous ranges of CPU IDs
(for example, 0-3).
-C
Display utilization of each CPU in each PG.
-h
Display short help message and exit with exit status 0.
-p
Display the physical relationship that corresponds to a PG. If a PG
has the same CPUs as the whole system, a processor core, or a chip,
system, core, or chip, as appropriate, is displayed after the shar‐
ing relationship of the PG in square brackets ("[]").
-P pg,...
Display utilization for specified PGs. Multiple PGs can be speci‐
fied as a comma-separated list of PG IDs. A hyphen ("-") can be
used to specify a contiguous range of PG IDs (for example, 0-3).
-r string1,string2,...
Display utilization only for PGs with a sharing relationship name
that matches any of the specified strings. The string can be a
whole relationship name or a portion of one or more relationship
names. The string matching is case-insensitive.
Multiple -r options can be entered, which results in matching all
PGs with a relationship name that matches any of the specified
strings.
-R string1,string2,...
Display information only about PGs with a sharing relationship name
other than the one(s) specified.
String matching is the same as described above for the -r option.
Multiple -R options can be entered.
-s key
Sort output lines by the specified key in descending order. The
specified key can be one of the following:
pg
Sort by PG ID.
hwload
Sort by hardware utilization.
swload
Sort by software utilization.
user
Sort by user time.
sys
Sort by system time.
idle
Sort by idle time.
depth
Sort by descending PG tree from root to leaves, depth-first
(default).
breadth
Sort by descending PG tree from root to leaves, breadth-first.
-S key
Sort output lines by the specified key in ascending order. Possible
key values are the same as for the -s option.
-t number
Show the top number of PGs for the specified integer number.
-T u | d
Display timestamp for each sampling interval in Unix time (see
time(2)) or the standard date format used by date(1).
-v
Display extra information about each PG including hardware utiliza‐
tion and capacity and software user, system, and idle times.
OUTPUT HEADINGSpgstat displays the column headings, which are listed below, along with
the meanings of those headings.
PG
Processor Group ID.
RELATIONSHIP
Sharing relationship for PG.
HW
Hardware load in percent (calculated as UTIL/CAP for interval).
UTIL
Hardware utilization of PG's shared hardware component over the
interval. This can be a large number, so K, M, B, and T are used
for denoting thousand, million, billion, and trillion, respec‐
tively.
CAP
Approximate maximum possible utilization for PG's shared hardware
component over the interval. This can be a large number, so K, M,
B, and T are used for denoting thousand, million, billion, and
trillion, respectively.
SW
Software load in percent (calculated as (USR + SYS) / (USR + SYS +
IDLE))
USR
Percentage of time that software threads ran in user mode on CPUs
in PG during interval.
SYS
Percentage of time that software threads ran in system mode on CPUs
in PG during interval.
IDLE
Percentage of time that no software threads ran on CPUs in PG dur‐
ing interval.
CPUS
CPU IDs for CPUs in PG.
EXAMPLES
In the following examples, the system contains one UltraSPARC T1 pro‐
cessor chip with 8 cores and 32 strands.
Example 1 Displaying Utilization for Specified Period
The following command displays utilization for all PGs over the last
two seconds.
$ pgstat 1 2
PG RELATIONSHIP HW SW CPUS
0 System - 0.4% 0-31
3 Data_Pipe_to_memory - 0.4% 0-31
2 Floating_Point_Unit 0% 0.4% 0-31
1 Integer_Pipeline 0% 0% 0-3
4 Integer_Pipeline 0% 0% 4-7
5 Integer_Pipeline 0% 0% 8-11
6 Integer_Pipeline 0% 0.2% 12-15
7 Integer_Pipeline 0% 0% 16-19
8 Integer_Pipeline 2.8% 2.7% 20-23
9 Integer_Pipeline 0.1% 0.2% 24-27
10 Integer_Pipeline 0% 0% 28-31
PG RELATIONSHIP HW SW CPUS
0 System - 0.4% 0-31
3 Data_Pipe_to_memory - 0.4% 0-31
2 Floating_Point_Unit 0% 0.4% 0-31
1 Integer_Pipeline 0% 0.2% 0-3
4 Integer_Pipeline 0% 0% 4-7
5 Integer_Pipeline 0% 0% 8-11
6 Integer_Pipeline 0% 0% 12-15
7 Integer_Pipeline 0% 0% 16-19
8 Integer_Pipeline 3.1% 2.5% 20-23
9 Integer_Pipeline 0% 0% 24-27
10 Integer_Pipeline 0% 0.2% 28-31
Example 2 Displaying Information about Integer Pipeline
The following command displays detailed information about the two most
utilized integer pipelines over the last two seconds.
$ pgstat-v -t 2 -r 'Integer_Pipeline' 1 2
PG RELATIONSHIP HW UTIL CAP SW USR SYS IDLE CPUS
1 Integer_Pipeline 0.2% 2.2M 1.4B 0.2% 0.0% 0.2% 99.8% 0-3
4 Integer_Pipeline 13.1% 181M 1.4B 14.9% 0.0% 14.9% 85.1% 4-7
PG RELATIONSHIP HW UTIL CAP SW USR SYS IDLE CPUS
1 Integer_Pipeline 0.2% 1.9M 1.2B 0.2% 0.0% 0.2% 99.8% 0-3
4 Integer_Pipeline 13.1% 163M 1.2B 14.9% 0.0% 14.9% 85.1% 4-7
Example 3 Displaying Core Utilization over Specified Period
The following command displays information about core utilization over
the last two minutes.
$ pgstat-A 60 2
PG RELATIONSHIP HW SW CPUS
0 System - 56.9% 0-31
3 Data_Pipe_to_memory - 56.9% 0-31
2 Floating_Point_Unit 0.0% 56.9% 0-31
1 Integer_Pipeline 36.7% 58.7% 0-3
4 Integer_Pipeline 41.9% 58.3% 4-7
5 Integer_Pipeline 31.0% 58.0% 8-11
6 Integer_Pipeline 30.7% 57.9% 12-15
7 Integer_Pipeline 30.1% 55.8% 16-19
8 Integer_Pipeline 40.2% 54.8% 20-23
9 Integer_Pipeline 35.0% 56.0% 24-27
10 Integer_Pipeline 40.3% 55.8% 28-31
PG RELATIONSHIP HW SW CPUS
0 System - 10.7% 0-31
3 Data_Pipe_to_memory - 10.7% 0-31
2 Floating_Point_Unit 0.0% 10.7% 0-31
1 Integer_Pipeline 9.0% 10.7% 0-3
4 Integer_Pipeline 9.6% 10.8% 4-7
5 Integer_Pipeline 8.6% 9.9% 8-11
6 Integer_Pipeline 10.5% 11.9% 12-15
7 Integer_Pipeline 9.1% 10.4% 16-19
8 Integer_Pipeline 9.6% 10.9% 20-23
9 Integer_Pipeline 8.9% 10.0% 24-27
10 Integer_Pipeline 9.5% 10.7% 28-31
SUMMARY: UTILIZATION OVER 120 SECONDS
------HARDWARE------ ------SOFTWARE------
PG RELATIONSHIP MIN AVG MAX MIN AVG MAX CPUS
0 System - - - 10.7% 10.7% 56.9% 0-31
3 Data_Pipe_to_memory - - - 10.7% 10.7% 56.9% 0-31
2 Floating_Point_Unit 0.0% 0.0% 0.0% 10.7% 10.7% 56.9% 0-31
1 Integer_Pipeline 9.0% 8.5% 36.7% 10.7% 10.7% 58.7% 0-3
4 Integer_Pipeline 9.6% 9.1% 41.9% 10.8% 10.8% 58.3% 4-7
5 Integer_Pipeline 8.6% 8.1% 31.0% 9.9% 9.9% 58.0% 8-11
6 Integer_Pipeline 10.5% 10.0% 30.7% 11.9% 11.9% 57.9% 12-15
7 Integer_Pipeline 9.1% 8.6% 30.1% 10.4% 10.4% 55.8% 16-19
8 Integer_Pipeline 9.6% 9.1% 40.2% 10.9% 10.9% 54.8% 20-23
9 Integer_Pipeline 8.9% 8.4% 35.0% 10.0% 10.0% 56.0% 24-27
10 Integer_Pipeline 9.5% 8.9% 40.3% 10.7% 10.7% 55.8% 28-31
EXIT STATUS
The following exit values are returned:
0
Successful completion.
1
Unable to get PG information from the system.
2
Specified interval, count, or all CPUs, PGs, and sharing relation‐
ships invalid.
3
Invalid syntax.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWesu │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │Uncommitted │
└─────────────────────────────┴─────────────────────────────┘
The command line options and output are Uncommitted.
SEE ALSOcputrack(1), cpustat(1M), dtrace(1M), pginfo(1M), cpc(3CPC),
libcpc(3LIB), attributes(5)SunOS 5.10 17 Aug 2010 pgstat(1M)
