LI76907: SNA SLOWS DRASTICALLY WHEN ANOTHER PROCESS TAKES CPU
Closed as program error.
Communications Server for Linux on System Z ------------------------------------------- On a multi-processor system, if one or more processors have high CPU usage from one or more other processes, the LiS processes of Communications Server appear to not get any CPU time, even those that are running on processors that are not under high usage. This drastically slows SNA communications, and may even cause link failures.
Assign only one processor to the system.
Each LiS process is tied to a specific processor. However, the processes communicate with each other, so if one becomes CPU-starved, then the rest have to wait on that one, so they all appear to become slowed.
Code has been changed to un-tie the LiS processes from specific processors. Each LiS process is started with an affinity for a specific processor, but is now allowed to float to other processors when necessary.
Reported component name
CS FOR LINUX
Reported component ID
NoSpecatt / Xsystem
Last modified date
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fixed component name
CS FOR LINUX
Fixed component ID
Applicable component levels