68e6247c20
Vast majority of uses the cache are just checking if there is an entry present on process exit (and evicting it if so). Both checking and eviction process are very expensive and put the lock protecting it high up on the profile during poudriere -j 104. Convert the linked list into a hash. This allows to almost always avoid taking the lock in the first place (and consequently almost removes it from the profile). Note only one lock is preserved as a split did not meaningfully impact contention. Should the cache be used for something it will still run into contention issues. The code needs a rewrite, but should someone want to tidy it up further the following can be done: 1) per-chain locks (or at least an array) 2) hashing by something else than just pid Sponsored by: The FreeBSD Foundation |
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| .. | ||
| pseudofs_fileno.c | ||
| pseudofs_internal.h | ||
| pseudofs_vncache.c | ||
| pseudofs_vnops.c | ||
| pseudofs.c | ||
| pseudofs.h | ||