| commit | 7df82bbe6aadd740b9a45f12e1bce1bf3a237db7 | |
| author | Matthew Dillon <dillon@apollo.backplane.com> | |
| Wed, 16 Aug 2017 03:29:06 +0000 (15 20:29 -0700) | ||
| committer | Matthew Dillon <dillon@apollo.backplane.com> | |
| Wed, 16 Aug 2017 03:29:06 +0000 (15 20:29 -0700) | ||
| tree | 7b1c6ea955f66329ebdf6c89a01db9ff397c7259 | treesnapshot (tar.gz zip) |
| parent | a07abcb98fb0546c5d1625e3fe5898ff4e730b90 | commitdiff |
kernel - Fix uload calculation in usched_dfly
* When a very large number of processes are runnable (greater than 32767),
the uload rollup field in dfly_pcpu[] can overflow. In addition, the
delta calculation for individual processes can also overflow.
Fix both cases.
* Symptoms: one cpu starts getting an excessive percentage of the process
load as the system attempts to continuously rebalance into it.
* When a very large number of processes are runnable (greater than 32767),
the uload rollup field in dfly_pcpu[] can overflow. In addition, the
delta calculation for individual processes can also overflow.
Fix both cases.
* Symptoms: one cpu starts getting an excessive percentage of the process
load as the system attempts to continuously rebalance into it.
| sys/kern/usched_dfly.c | diffblobblamehistory |