atopsar(1)
NAME
atopsar - AT Computing's System Activity Report (atop related)
SYNOPSIS
atopsar [-flags...] [-r file|date ] [-R cnt ] [-b hh:mm ] [-e hh:mm ] atopsar [-flags...] interval [ samples ]
DESCRIPTION
The program atopsar can be used to report statistics on system level.
In the first synopsis line (no sampling interval specified), atopsar
extracts data from a raw logfile that has been recorded previously by
the program atop (option -w of the atop program).
You can specify the name of the logfile with the -r option of the
atopsar program. When a daily logfile of atop is used, named
/var/log/atop/atop_YYYYMMDD (where YYYYMMDD reflects the date), the
required date of the form YYYYMMDD can be specified with the -r option
instead of the filename, or the symbolic name 'y' can be used for
yesterday's daily logfile (this can be repeated so 'yyyy' indicates the
logfile of four days ago). If the -r option is not specified at all,
today's daily logfile is used by default.
The starting and ending times of the report can be defined using the
options -b and -e followed by a time argument of the form hh:mm.
In the second synopsis line, atopsar reads actual activity counters
from the kernel with the specified interval (in seconds) and the
specified number of samples (optionally). When atopsar is activated in
this way it immediately sends the output for every requested report to
standard output. If only one type of report is requested, the header
is printed once and after every interval seconds the statistical
counters are shown for that period. If several reports are requested,
a header is printed per sample followed by the statistical counters for
that period.
Some generic flags can be specified to influence the behaviour of the
atopsar program:
-S By default the timestamp at the beginning of a line is suppressed
if more lines are shown for one interval. With this flag a
timestamp is given for every output-line (easier for post-
processing).
-a By default certain resources as disks and network interfaces are
only shown when they were active during the interval. With this
flag all resources of a given type are shown, even if they were
inactive during the interval.
-x By default atopsar only uses colors if output is directed to a
terminal (window). These colors might indicate that a critical
occupation percentage has been reached (red) or has been almost
reached (cyan) for a particular resource. See the man-page of
atop for a detailed description of this feature (section COLORS).
With the flag -x the use of colors is suppressed unconditionally.
-C By default atopsar only uses colors if output is directed to a
terminal (window). These colors might indicate that a critical
occupation percentage has been reached (red) or has been almost
reached (cyan) for a particular resource. See the man-page of
atop for a detailed description of this feature (section COLORS).
With the flag -C colors will always be used, even if output is not
directed to a terminal.
-M Use markers at the end of a line to indicate that a critical
occupation percentage has been reached ('*') or has been almost
reached ('+') for particular resources. The marker '*' is similar
to the color red and the marker '+' to the color cyan. See the
man-page of atop for a detailed description of these colors
(section COLORS).
-H Repeat the header line within a report for every N detail lines.
The value of N is determined dynamically in case of output to a
tty/window (depending on the number of lines); for output to a
file or pipe this value is 23.
-R Summarize cnt samples into one sample. When the logfile contains
e.g. samples of 10 minutes, the use of the flag '-R 6' shows a
report with one sample for every hour.
Other flags are used to define which reports are required:
-A Show all possible reports.
-c Report about CPU utilization (in total and per cpu).
-p Report about processor-related matters, like load-averages and
hardware interrupts.
-P Report about processes.
-m Current memory- and swap-occupation.
-s Report about paging- and swapping-activity, and overcommitment.
-l Report about utilization of logical volumes.
-f Report about utilization of multiple devices.
-d Report about utilization of disks.
-i Report about the network interfaces.
-I Report about errors for network-interfaces.
-w Report about IP version 4 network traffic.
-W Report about errors for IP version 4 traffic.
-y General report about ICMP version 4 layer activity.
-Y Per-type report about ICMP version 4 layer activity.
-u Report about UDP version 4 network traffic.
-z Report about IP version 6 network traffic.
-Z Report about errors for IP version 6 traffic.
-k General report about ICMP version 6 layer activity.
-K Per-type report about ICMP version 6 layer activity.
-U Report about UDP version 6 network traffic.
-t Report about TCP network traffic.
-T Report about errors for TCP-traffic.
-O Report about top-3 processes consuming most processor capacity.
-G Report about top-3 processes consuming most resident memory.
-D Report about top-3 processes issueing most disk transfers.
-N Report about top-3 processes issueing most IPv4/IPv6 socket
transfers.
OUTPUT DESCRIPTION
Depending on the requested report, a number of columns with output
values are produced. The values are mostly presented as a number of
events per second.
The output for the flag -c contains the following columns per cpu:
usr% Percentage of cpu-time consumed in user mode (program text)
for all active processes running with a nice value of zero
(default) or a negative nice value (which means a higher
priority than usual). The cpu consumption in user mode of
processes with a nice value larger than zero (lower
priority) is indicated in the nice%-column.
nice% Percentage of cpu time consumed in user mode (i.e. program
text) for all processes running witn a nice value larger
than zero (which means with a lower priority than average).
sys% Percentage of cpu time consumed in system mode (kernel
text) for all active processes. A high percentage usually
indicates a lot of system calls being issued.
irq% Percentage of cpu time consumed for handling of device
interrupts.
softirq% Percentage of cpu time consumed for soft interrupt
handling.
steal% Percentage of cpu time stolen by other virtual machines
running on the same hardware.
guest% Percentage of cpu time used by other virtual machines
running on the same hardware.
wait% Percentage of unused cpu time while at least one of the
processes in wait-state awaits completion of disk I/O.
idle% Percentage of unused cpu time because all processes are in
a wait-state but not waiting for disk-I/O.
The output for the flag -p contains the following values:
pswch/s Number of process switches (also called context switches)
per second on this cpu. A process switch occurs at the
moment that an active thread (i.e. the thread using a cpu)
enters a wait state or has used its time slice completely;
another thread will then be chosen to use the cpu.
devintr/s Number of hardware interrupts handled per second on this
cpu.
clones/s The number of new threads started per second.
loadavg1 Load average reflecting the average number of threads in
the runqueue or in non-interruptible wait state (usually
waiting for disk or tape I/O) during the last minute.
loadavg5 Load average reflecting the average number of threads in
the runqueue or in non-interruptible wait state (usually
waiting for disk or tape I/O) during the last 5 minutes.
loadavg15 Load average reflecting the average number of threads in
the runqueue or in non-interruptible wait state (usually
waiting for disk or tape I/O) during the last 15 minutes.
The output for the flag -P contains information about the processes and
threads:
clones/s The number of new threads started per second.
pexit/s
curproc Total number of processes present in the system.
curzomb Number of zombie processes present in the system.
thrrun Total number of threads present in the system in state
'running'.
thrslpi Total number of threads present in the system in state
'interruptible sleeping'.
thrslpu Total number of threads present in the system in state
'uninterruptible sleeping'.
The output for the flag -m contains information about the memory- and
swap-utilization:
memtotal Total usable main memory size.
memfree Available main memory size at this moment (snapshot).
buffers Main memory used at this moment to cache metadata-blocks
(snapshot).
cached Main memory used at this moment to cache data-blocks
(snapshot).
dirty Amount of memory in the page cache that still has to be
flushed to disk at this moment (snapshot).
slabmem Main memory used at this moment for dynamically allocated
memory by the kernel (snapshot).
swptotal Total swap space size at this moment (snapshot).
swpfree Available swap space at this moment (snapshot).
The output for the flag -s contains information about the frequency of
swapping:
pagescan/s Number of scanned pages per second due to the fact that
free memory drops below a particular threshold.
swapin/s The number of memory-pages the system read from the swap-
device per second.
swapout/s The number of memory-pages the system wrote to the swap-
device per second.
commitspc The committed virtual memory space i.e. the reserved
virtual space for all allocations of private memory space
for processes.
commitlim The maximum limit for the committed space, which is by
default swap size plus 50% of memory size. The kernel only
verifies whether the committed space exceeds the limit if
strict overcommit handling is configured
(vm.overcommit_memory is 2).
The output for the flags -l (LVM), -f (MD), and -d (hard disk) contains
the following columns per active unit:
disk Name.
busy Busy-percentage of the unit (i.e. the portion of time that
the device was busy handling requests).
read/s Number of read-requests issued per second on this unit.
KB/read Average number of Kbytes transferred per read-request for
this unit.
writ/s Number of write-requests issued per second on this unit.
KB/writ Average number of Kbytes transferred per write-request for
this unit.
avque Average number of requests outstanding in the queue during
the time that the unit is busy.
avserv Average number of milliseconds needed by a request on this
unit (seek, latency and data-transfer).
The output for the flag -i provides information about utilization of
network interfaces:
interf Name of interface.
busy Busy percentage for this interface. If the linespeed of
this interface could not be determined (for virtual
interfaces or in case that atop or atopsar had no root-
privileges), a question mark is shown.
ipack/s Number of packets received from this interface per second.
opack/s Number of packets transmitted to this interface per second.
iKbyte/s Number of Kbytes received from this interface per second.
oKbyte/s Number of Kbytes transmitted via this interface per second.
imbps/s Effective number of megabits received per second.
ombps/s Effective number of megabits transmitted per second.
maxmbps/s Linespeed as number of megabits per second. If the
linespeed could not be determined (for virtual interfaces
or in case that atop or atopsar had no root-privileges),
value 0 is shown.
The linespeed is followed by the indication 'f' (full
duplex) or 'h' (half duplex).
The output for the flag -I provides information about the failures that
were detected for network interfaces:
interf Name of interface.
ierr/s Number of bad packets received from this interface per
second.
oerr/s Number of times that packet transmission to this interface
failed per second.
coll/s Number of collisions encountered per second while
transmitting packets.
idrop/s Number of received packets dropped per second due to lack
of buffer-space in the local system.
odrop/s Number of transmitted packets dropped per second due to
lack of buffer-space in the local system.
iframe/s Number of frame alignment-errors encountered per second on
received packets.
ocarrier/s Number of carrier-errors encountered per second on
transmitted packets.
The output for the flag -w provides information about the utilization
of the IPv4-layer (formal SNMP-names between brackets):
inrecv/s Number of IP datagrams received from interfaces per second,
including those received in error (ipInReceives).
outreq/s Number of IP datagrams that local higher-layer protocols
supplied to IP in requests for transmission per second
(ipOutRequests).
indeliver/s Number of received IP datagrams that have been succesfully
delivered to higher protocol-layers per second
(ipInDelivers).
forward/s Number of received IP datagrams per second for which this
entity was not their final IP destination, as a result of
which an attempt was made to forward (ipForwDatagrams).
reasmok/s Number of IP datagrams succesfully reassembled per second
(ipReasmOKs).
fragcreat/s Number of IP datagram fragments generated per second at
this entity (ipFragCreates).
The output for the flag -W provides information about the failures that
were detected in the IPv4-layer (formal SNMP-names between brackets):
in: dsc/s Number of input IP datagrams per second for which no
problems were encountered to prevent their continued
processing but that were discarded, e.g. for lack of buffer
space (ipInDiscards).
in: hder/s Number of input IP datagrams per second discarded due to
errors in the IP header (ipInHdrErrors).
in: ader/s Number of input IP datagrams per second discarded because
the IP address in the destination field was not valid to be
received by this entity (ipInAddrErrors).
in: unkp/s Number of inbound packets per second that were discarded
because of an unknown or unsupported protocol
(ipInUnknownProtos).
in: ratim/s Number of timeout-situations per second while other
fragments were expected for successful reassembly
(ipReasmTimeout).
in: rfail/s Number of failures detected per second by the IP reassembly
algorithm (ipReasmFails).
out: dsc/s Number of output IP datagrams per second for which no
problems were encountered to prevent their continued
processing but that were discarded, e.g. for lack of buffer
space (ipOutDiscards).
out: nrt/s Number of IP datagrams per second discarded because no
route could be found (ipOutNoRoutes).
The output for the flag -y provides information about the general
utilization of the ICMPv4-layer and some information per type of ICMP-
message (formal SNMP-names between brackets):
intot/s Number of ICMP messages (any type) received per second at
this entity (icmpInMsgs).
outtot/s Number of ICMP messages (any type) transmitted per second
from this entity (icmpOutMsgs).
inecho/s Number of ICMP Echo (request) messages received per second
(icmpInEchos).
inerep/s Number of ICMP Echo-Reply messages received per second
(icmpInEchoReps).
otecho/s Number of ICMP Echo (request) messages transmitted per
second (icmpOutEchos).
oterep/s Number of ICMP Echo-Reply messages transmitted per second
(icmpOutEchoReps).
The output for the flag -Y provides information about other types of
ICMPv4-messages (formal SNMP-names between brackets):
ierr/s Number of ICMP messages received per second but determined
to have ICMP-specific errors (icmpInErrors).
isq/s Number of ICMP Source Quench messages received per second
(icmpInSrcQuenchs).
ird/s Number of ICMP Redirect messages received per second
(icmpInRedirects).
idu/s Number of ICMP Destination Unreachable messages received
per second (icmpInDestUnreachs).
ite/s Number of ICMP Time Exceeded messages received per second
(icmpOutTimeExcds).
oerr/s Number of ICMP messages transmitted per second but
determined to have ICMP-specific errors (icmpOutErrors).
osq/s Number of ICMP Source Quench messages transmitted per
second (icmpOutSrcQuenchs).
ord/s Number of ICMP Redirect messages transmitted per second
(icmpOutRedirects).
odu/s Number of ICMP Destination Unreachable messages transmitted
per second (icmpOutDestUnreachs).
ote/s Number of ICMP Time Exceeded messages transmitted per
second (icmpOutTimeExcds).
The output for the flag -u provides information about the utilization
of the UDPv4-layer (formal SNMP-names between brackets):
indgram/s Number of UDP datagrams per second delivered to UDP users
(udpInDatagrams).
outdgram/s Number of UDP datagrams transmitted per second from this
entity (udpOutDatagrams).
inerr/s Number of received UDP datagrams per second that could not
be delivered for reasons other than the lack of an
application at the destination port (udpInErrors).
noport/s Number of received UDP datagrams per second for which there
was no application at the destination port (udpNoPorts).
The output for the flag -z provides information about the utilization
of the IPv6-layer (formal SNMP-names between brackets):
inrecv/s Number of input IPv6-datagrams received from interfaces per
second, including those received in error
(ipv6IfStatsInReceives).
outreq/s Number of IPv6-datagrams per second that local higher-layer
protocols supplied to IP in requests for transmission
(ipv6IfStatsOutRequests). This counter does not include
any forwarded datagrams.
inmc/s Number of multicast packets per second that have been
received by the interface (ipv6IfStatsInMcastPkts).
outmc/s Number of multicast packets per second that have been
transmitted to the interface (ipv6IfStatsOutMcastPkts).
indeliv/s Number of IP datagrams succesfully delivered per second to
IPv6 user-protocols, including ICMP
(ipv6IfStatsInDelivers).
reasmok/s Number of IPv6 datagrams succesfully reassembled per second
(ipv6IfStatsReasmOKs).
fragcre/s Number of IPv6 datagram fragments generated per second at
this entity (ipv6IfStatsOutFragCreates).
The output for the flag -Z provides information about the failures that
were detected in the IPv6-layer (formal SNMP-names between brackets):
in: dsc/s Number of input IPv6 datagrams per second for which no
problems were encountered to prevent their continued
processing but that were discarded, e.g. for lack of buffer
space (ipv6IfStatsInDiscards).
in: hder/s Number of input datagrams per second discarded due to
errors in the IPv6 header (ipv6IfStatsInHdrErrors).
in: ader/s Number of input datagrams per second discarded because the
IPv6 address in the destination field was not valid to be
received by this entity (ipv6IfStatsInAddrErrors).
in: unkp/s Number of locally-addressed datagrams per second that were
discarded because of an unknown or unsupported protocol
(ipv6IfStatsInUnknownProtos).
in: ratim/s Number of timeout-situations per second while other IPv6
fragments were expected for successful reassembly
(ipv6ReasmTimeout).
in: rfail/s Number of failures detected per second by the IPv6
reassembly-algorithm (ipv6IfStatsReasmFails).
out: dsc/s Number of output IPv6 datagrams per second for which no
problems were encountered to prevent their continued
processing but that were discarded, e.g. for lack of buffer
space (ipv6IfStatsOutDiscards).
out: nrt/s Number of IPv6 datagrams per second discarded because no
route could be found (ipv6IfStatsInNoRoutes).
The output for the flag -k provides information about the general
utilization of the ICMPv6-layer and some information per type of ICMP-
message (formal SNMP-names between brackets):
intot/s Number of ICMPv6 messages (any type) received per second at
the interface (ipv6IfIcmpInMsgs).
outtot/s Number of ICMPv6 messages (any type) transmitted per second
from this entity (ipv6IfIcmpOutMsgs).
inerr/s Number of ICMPv6 messages received per second that had
ICMP-specific errors, such as bad ICMP checksums, bad
length, etc (ipv6IfIcmpInErrors).
innsol/s Number of ICMP Neighbor Solicit messages received per
second (ipv6IfIcmpInNeighborSolicits).
innadv/s Number of ICMP Neighbor Advertisement messages received per
second (ipv6IfIcmpInNeighborAdvertisements).
otnsol/s Number of ICMP Neighbor Solicit messages transmitted per
second (ipv6IfIcmpOutNeighborSolicits).
otnadv/s Number of ICMP Neighbor Advertisement messages transmitted
per second (ipv6IfIcmpOutNeighborAdvertisements).
The output for the flag -K provides information about other types of
ICMPv6-messages (formal SNMP-names between brackets):
iecho/s Number of ICMP Echo (request) messages received per second
(ipv6IfIcmpInEchos).
ierep/s Number of ICMP Echo-Reply messages received per second
(ipv6IfIcmpInEchoReplies).
oerep/s Number of ICMP Echo-Reply messages transmitted per second
(ipv6IfIcmpOutEchoReplies).
idu/s Number of ICMP Destination Unreachable messages received
per second (ipv6IfIcmpInDestUnreachs).
odu/s Number of ICMP Destination Unreachable messages transmitted
per second (ipv6IfIcmpOutDestUnreachs).
ird/s Number of ICMP Redirect messages received per second
(ipv6IfIcmpInRedirects).
ord/s Number of ICMP Redirect messages transmitted per second
(ipv6IfIcmpOutRedirect).
ite/s Number of ICMP Time Exceeded messages received per second
(ipv6IfIcmpInTimeExcds).
ote/s Number of ICMP Time Exceeded messages transmitted per
second (ipv6IfIcmpOutTimeExcds).
The output for the flag -U provides information about the utilization
of the UDPv6-layer (formal SNMP-names between brackets):
indgram/s Number of UDPv6 datagrams per second delivered to UDP users
(udpInDatagrams),
outdgram/s Number of UDPv6 datagrams transmitted per second from this
entity (udpOutDatagrams),
inerr/s Number of received UDPv6 datagrams per second that could
not be delivered for reasons other than the lack of an
application at the destination port (udpInErrors).
noport/s Number of received UDPv6 datagrams per second for which
there was no application at the destination port
(udpNoPorts).
The output for the flag -t provides information about the utilization
of the TCP-layer (formal SNMP-names between brackets):
insegs/s Number of received segments per second, including those
received in error (tcpInSegs).
outsegs/s Number of transmitted segments per second, excluding those
containing only retransmitted octets (tcpOutSegs).
actopen/s Number of active opens per second that have been supported
by this entity (tcpActiveOpens).
pasopen/s Number of passive opens per second that have been supported
by this entity (tcpPassiveOpens).
nowopen Number of connections currently open (snapshot), for which
the state is either ESTABLISHED or CLOSE-WAIT
(tcpCurrEstab).
The output for the flag -T provides information about the failures that
were detected in the TCP-layer (formal SNMP-names between brackets):
inerr/s Number of received segments per second received in error
(tcpInErrs).
retrans/s Number of retransmitted segments per second
(tcpRetransSegs).
attfail/s Number of failed connection attempts per second that have
occurred at this entity (tcpAttemptFails).
estabreset/s
Number of resets per second that have occurred at this
entity (tcpEstabResets).
outreset/s Number of transmitted segments per second containing the
RST flag (tcpOutRsts).
The output for the flag -O provides information about the top-3 of
processes with the highest processor consumption:
pid Process-id (if zero, the process has exited while the pid
could not be determined).
command The name of the process.
cpu% The percentage of cpu-capacity being consumed. This value
can exceed 100% for a multithreaded process running on a
multiprocessor machine.
The output for the flag -G provides information about the top-3 of
processes with the highest memory consumption:
pid Process-id (if zero, the process has exited while the pid
could not be determined).
command The name of the process.
mem% The percentage of resident memory-utilization by this
process.
The output for the flag -D provides information about the top-3 of
processes that issue the most read and write accesses to disk:
pid Process-id (if zero, the process has exited while the pid
could not be determined).
command The name of the process.
dsk% The percentage of read and write accesses related to the
total number of read and write accesses issued on disk by
all processes, so a high percentage does not imply a high
disk load on system level.
The output for the flag -N provides information about the top-3 of
processes that issue the most socket transfers for IPv4/IPv6:
pid Process-id (if zero, the process has exited while the pid
could not be determined).
command The name of the process.
net% The percentage of socket transfers related to the total
number of transfers issued by all processes, so a high
percentage does not imply a high network load on system
level.
EXAMPLES
To see today's cpu-activity so far (supposed that atop is logging in
the background):
atopsar
To see the memory occupation for January 2, 2010 between 10:00 and
12:30 (supposed that atop has been logging daily in the background):
atopsar -m -r /var/log/atop_20100102 -b 10:00 -e 12:30
or
atopsar -m -r 20100102 -b 10:00 -e 12:30
or, suppose it is January 5, 2010 at this moment
atopsar -m -r yyy -b 10:00 -e 12:30
Write a logfile with atop to record the system behaviour for 30 minutes
(30 samples of one minute) and produce all available reports
afterwards:
atop -w /tmp/atoplog 60 30
atopsar -A -r /tmp/atoplog
To watch TCP activity evolve for ten minutes (10 samples with sixty
seconds interval):
atopsar -t 60 10
To watch the header-lines ('_' as last character) of all reports with
only the detail-lines showing critical resource consumption (marker '*'
or '+' as last character):
atopsar -AM | grep '[_*+]$'
FILES
/etc/atoprc
Configuration file containing system-wide default values (mainly
flags). See related man-page.
~/.atoprc
Configuration file containing personal default values (mainly
flags). See related man-page.
/var/log/atop/atop_YYYYMMDD
Daily data file, where YYYYMMDD are digits representing the date.
SEE ALSO
atop(1), atoprc(5), http://www.atoptool.nl
AUTHOR
Gerlof Langeveld (gerlof.langeveld@atoptool.nl)
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