| commit | 327aab1f73ae821489680434e29dd7ef4c0607f3 | |
| author | Matthew Dillon <dillon@apollo.backplane.com> | |
| Mon, 16 Oct 2017 00:42:26 +0000 (15 17:42 -0700) | ||
| committer | Matthew Dillon <dillon@apollo.backplane.com> | |
| Mon, 16 Oct 2017 18:30:24 +0000 (16 11:30 -0700) | ||
| tree | 8785929eaf1525d8329f5101958539c21c5528c2 | treesnapshot (tar.gz zip) |
| parent | 7832c77596c26db846c39167d8495a7a7ca3974a | commitdiff |
kernel - Clean up ucred and plimit cache line locality
* Move struct plimit's p_spin and p_refcnt fields into their own
cacheline. This structure is massively shared and read often.
Doing this avoids unnecessary cache line ping-pongs.
* Only use p_spin to modify a resource limit. Do not use it to
access the resource limit.
* Integrate plimit's exclusivity flag into p_refcnt.
* Move struct ucred's cr_ref into its own cacheline. This structure
is massively shared and read often. Doing this avoids unnecessary
cache line ping-pongs.
* Move struct plimit's p_spin and p_refcnt fields into their own
cacheline. This structure is massively shared and read often.
Doing this avoids unnecessary cache line ping-pongs.
* Only use p_spin to modify a resource limit. Do not use it to
access the resource limit.
* Integrate plimit's exclusivity flag into p_refcnt.
* Move struct ucred's cr_ref into its own cacheline. This structure
is massively shared and read often. Doing this avoids unnecessary
cache line ping-pongs.