New VIOS tunables with v126.96.36.199.
cggibbo 270000TMUJ Visits (11864)
New SEA thread tuning parameters with VIOS level 188.8.131.52
Specifies the number of threads in threaded mode, where the value of the thread parameter is 1. This value applies only when the thread mode is enabled. The nthreads attribute can be set to any value between 1 and 128. The default value is 7.
Specifies the queue size for the Shared Ethernet Adapter (SEA) threads in threaded mode where the value of the thread parameter is 1. This attribute indicates the number of packets that can be accommodated in each thread queue. This value applies only when the thread mode is enabled. When you change this value, the change does not take effect until the system restarts. The queue_size attribute can be set to any value between 2 and 65535. The default value is 8192.
Specifies the hash algorithm that is used to assign connections to Shared Ethernet Adapter (SEA) threads in threaded mode, where the value of the thread parameter is 1. When the hash_algo parameter is set to 0 (the default), an addition operation of the source and destination Media Access Control (MAC) addresses, IP addresses, and port numbers is done. When the hash_algo parameter is set to 1, a murmur3 hash function is done instead of an addition operation. The murmur3 hash function is slower, but it achieves better distribution. This value applies only when the thread mode is enabled.
$ lsdev -dev ent6 -attr
attribute value desc
accounting enabled Enable per-client accounting of network stat
gvrp no Enable GARP VLAN Registration Protocol (GVR
ha_mode disabled High Availability Mode
hash_algo 0 Hash algorithm used to select a SEA thre
jumbo_frames no Enable Gigabit Ethernet Jumbo Fram
large_receive no Enable receive TCP segment aggr
largesend 0 Enable Hardware Transmit TCP Rese
lldpsvc no Enable IEEE 802.1qbg serv
netaddr 0 Address to ping
nthreads 7 Number of SEA threads in Thread mode
pvid 50 PVID to use for the SEA devi
pvid_adapter ent4 Default virtual adapter to use for non-VLAN-tagged packets True
qos_mode disabled N/A
queue_size 8192 Queue size for a SEA thre
real_adapter ent0 Physical adapter associated with the SEA
thread 1 Thread mode enabled (1) or disabled (0)
virt_adapters ent4 List of virtual adapters associated with the SEA (comma separated) True
# lsattr -Rl ent6 -a hash_algo
# lsattr -Rl ent6 -a nthreads
# lsattr -Rl ent6 -a queue_size
New LPM tuning parameters with VIOS level 184.108.40.206.
A new pseudo device is available to support Live Partition Mobility performance tuning.
$ lsdev –dev vioslpm0 –attr
$ chdev –dev vioslpm0 –attr cfg_msp_ops=5
$ lsdev -dev vioslpm0 -attr
attribute value desc
cfg_msp_lpm_ops 8 Configured number of concurrent LPM operations for this MSP True
concurrency_lvl 3 Concurrency leve
lpm_msnap_succ 1 Create mini-snap for successful migr
max_lpm_vasi 1 Maximum number of VASI adapters used for LPM operations False
max_vasi_ops 8 Maximum number of concurrent LPM operations per VASI False
tcp_port_high 0 TCP highest ephemeral port
tcp_port_low 0 TCP lowest ephemeral port
New features of the migrlpar command with VIOS level 220.127.116.11.
You can use the HMC command line interface to specify the port name. List all the valid port names of the Fibre Channel by running the lsnports command. From the list of the valid port names, specify the port name that you want to use by running the migrlpar command with the attribute
vios_fc_port_name specifying the port name you want to use.
The following attributes of pseudo device can be modified by using the migrlpar command:
Run the following HMC command to modify the attribute values of the pseudo device, for example to set the number of active migrations to 8 run:
$ migrlpar -o set -r lpar -m 795-1 -p lpar1 -i "num
The default value for this attribute is 4. To run the maximum number of supported partition mobility operations on the VIOS, this value must be set the supported maximum number.
To set the amount of resources allocated for each mobility operation to a value of 2, run the following command:
$ migrlpar -o set -r lpar -m 795-1 -p lpar1 -i "con
The range of the conc
New LPM error codes.
There are new error codes available for troubleshooting partition mobility: