Workload characterization

Cluster analysis such as k means and mini spanning tree categorize the natural groups of workload for performance modeling and cap planning

T2000 interrupt bound

I have a T2000 server which experienced LOW CPU
usage. As you can see with the load generated,
CPU usage always 25% and interrupts are executed
by a fixed processor 24. All 64 threads of the user
land process (a single JVM process, multi-thread) only
thread number 33 is taking system and user land
resources and all other threads are in LOCK mode
and many VCX happen on these processors.

I have all ipge setting on /etc/system. I also have
all IP module setting in place. I am trying to verify
if it is system specific issue. That's why I am looking
for different system for a test.

Disk Management on Solaris

(1) see how may disk

AVAILABLE DISK SELECTIONS:
0. c3t0d0
/pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@0,0
1. c3t1d0
/pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@1,0
Specify disk (enter its number):


There are 2 disks

(2) see how disk is used

# df -kh
Filesystem size used avail capacity Mounted on
/dev/dsk/c3t0d0s0 11G 7.8G 2.7G 75% /
/devices 0K 0K 0K 0% /devices
ctfs 0K 0K 0K 0% /system/contract
proc 0K 0K 0K 0% /proc
mnttab 0K 0K 0K 0% /etc/mnttab
swap 5.6G 1008K 5.6G 1% /etc/svc/volatile
objfs 0K 0K 0K 0% /system/object/platform/sun4v/lib/libc_psr/libc_psr_hwcap1.so.1
11G 7.8G 2.7G 75% /platform/sun4v/lib/libc_psr.so.1/platform/sun4v/lib/sparcv9/libc_psr/libc_psr_hwcap1.so.1
11G 7.8G 2.7G 75% /platform/sun4v/lib/sparcv9/libc_psr.so.1
fd 0K 0K 0K 0% /dev/fd
/dev/dsk/c3t0d0s5 5.8G 3.0G 2.7G 53% /var
swap 6.7G 1.1G 5.6G 16% /tmp
swap 5.6G 48K 5.6G 1% /var/run
/dev/lofi/1 330M 330M 0K 100% /tmp/s10install

you can see only disk0 c3t0d0 is in use


(3) See used disk partition


*# format*
Searching for disks...done


AVAILABLE DISK SELECTIONS:
0. c3t0d0
/pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@0,0
1. c3t1d0
/pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@1,0
*Specify disk (enter its number): 0*
selecting c3t0d0
[disk formatted]
Warning: Current Disk has mounted partitions.
/dev/dsk/c3t0d0s0 is currently mounted on /. Please see umount(1M).
/dev/dsk/c3t0d0s1 is currently used by swap. Please see swap(1M).
/dev/dsk/c3t0d0s5 is currently mounted on /var. Please see umount(1M).


FORMAT MENU:
disk - select a disk
type - select (define) a disk type
partition - select (define) a partition table
current - describe the current disk
format - format and analyze the disk
repair - repair a defective sector
label - write label to the disk
analyze - surface analysis
defect - defect list management
backup - search for backup labels
verify - read and display labels
save - save new disk/partition definitions
inquiry - show vendor, product and revision
volname - set 8-character volume name
! - execute , then return
quit
*format> partition

*
PARTITION MENU:
0 - change `0' partition
1 - change `1' partition
2 - change `2' partition
3 - change `3' partition
4 - change `4' partition
5 - change `5' partition
6 - change `6' partition
7 - change `7' partition
select - select a predefined table
modify - modify a predefined partition table
name - name the current table
print - display the current table
label - write partition map and label to the disk
! - execute , then return
quit
*partition> print*
Current partition table (original):
Total disk cylinders available: 14087 + 2 (reserved cylinders)

Part Tag Flag Cylinders Size Blocks
0 root wm 403 - 2616 10.74GB (2214/0/0) 22529664
1 swap wu 0 - 402 1.96GB (403/0/0) 4100928
2 backup wm 0 - 14086 68.35GB (14087/0/0) 143349312
3 unassigned wm 0 0 (0/0/0) 0
4 unassigned wm 0 0 (0/0/0) 0
5 var wm 2617 - 3824 5.86GB (1208/0/0) 12292608
6 unassigned wm 0 0 (0/0/0) 0
7 unassigned wm 0 0 (0/0/0) 0


(4) see how is the free disk paritioned

*# format*
Searching for disks...done


AVAILABLE DISK SELECTIONS:
0. c3t0d0
/pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@0,0
1. c3t1d0
/pci@7c0/pci@0/pci@1/pci@0,2/LSILogic,sas@2/sd@1,0
*Specify disk (enter its number): 1*
selecting c3t1d0
[disk formatted]
*format> partition*


PARTITION MENU:
0 - change `0' partition
1 - change `1' partition
2 - change `2' partition
3 - change `3' partition
4 - change `4' partition
5 - change `5' partition
6 - change `6' partition
7 - change `7' partition
select - select a predefined table
modify - modify a predefined partition table
name - name the current table
print - display the current table
label - write partition map and label to the disk
! - execute , then return
quit
*partition> print*
Current partition table (original):
Total disk cylinders available: 14087 + 2 (reserved cylinders)

Part Tag Flag Cylinders Size Blocks
0 root wm 0 - 25 129.19MB (26/0/0) 264576
1 swap wu 26 - 51 129.19MB (26/0/0) 264576
2 backup wu 0 - 14086 68.35GB (14087/0/0) 143349312
3 unassigned wm 0 0 (0/0/0) 0
4 unassigned wm 0 0 (0/0/0) 0
5 unassigned wm 0 0 (0/0/0) 0
* 6 usr wm 52 - 14086 68.10GB (14035/0/0) 142820160*
7 unassigned wm 0 0 (0/0/0) 0


(5) create mount point for disk1

create a directory $(dir Name)

mount /dev/dsk/c3t1d0s6 $(dirName)


so disk can be accessable now.

plockstat hit bug for the second call

I am on T2000 with S10 U3 bits of KernelID = Generic_118833-18

# plockstat -x aggsize=500m -x dynvarsize=200m -x bufresize=auto -p 654
^C
Mutex block

Count nsec Lock Caller
--------------------------------------------------------------------- ----------
Segmentation Fault(coredump)


The core file is below:

----------------- lwp# 1 / thread# 1 --------------------
ffffffff7ee39a50 strlen (100003faa, ffffffff7ffff6e8, ffffffff7eea0ed4, ffffffff7fffed99, 0, 100003fa9) + 50
ffffffff7eea4fdc snprintf (ffffffff7ffffa10, 0, 100003fa8, 0, ffffffff7ffff740, 100003000) + 88
0000000100001cd8 ???????? (1003bff20, ff2b9bec, ffffffff7ffffa10, 28, 1, 1d)
0000000100001ff4 ???????? (10040e4d8, 10040e4f8, 2, 10040e4d8, 10040e4c8, 100106990)
ffffffff7f225664 dt_aggregate_walk_sorted (10010b500, 100001de8, 0, ffffffff7f224f08, 0, 1004395c0) + a4
0000000100002e9c main (100001, 100106000, 100000, 100001000, 100107228, 100106) + ad0
000000010000159c _start (0, 0, 0, 0, 0, 0) + 17c
----------------- lwp# 2 / thread# 2 --------------------
ffffffff7eece820 _write (102, ffffffff725fbf48, 8, 0, ffffffff7e300000, 0) + c
ffffffff7f252768 dt_proc_control (0, 1fc000, 8, ffffffff725fbf48, 1, 1) + 1f0
ffffffff7eecd2d8 _lwp_start (0, 0, 0, 0, 0, 0)