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0a51083e39
/dev/fd on Darwin
Consider the following strace output:
prlimit64(0, RLIMIT_NOFILE, NULL, {rlim_cur=1024, rlim_max=1024*1024}) = 0
Yes, that is well over a million file descriptors!
This reduces the ZED start-up time from "at least a second" to
"instantaneous", and, under strace, from "don't even try" to "usable"
by simple virtue of doing five syscalls instead of over a million;
in most cases the main loop does nothing
Recent Linuxes (5.8+) have close_range(2) for this, but that's an
overoptimisation (and libcs don't have wrappers for it yet)
This is also run by the ZEDLET pre-exec. Compare:
Finished "all-syslog.sh" eid=13 pid=6717 time=1.027100s exit=0
Finished "history_event-zfs-list-cacher.sh" eid=13 pid=6718 time=1.046923s exit=0
to
Finished "all-syslog.sh" eid=12 pid=4834 time=0.001836s exit=0
Finished "history_event-zfs-list-cacher.sh" eid=12 pid=4835 time=0.001346s exit=0
lol
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #11834
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| .. | ||
| agents | ||
| zed.d | ||
| .gitignore | ||
| Makefile.am | ||
| zed_conf.c | ||
| zed_conf.h | ||
| zed_disk_event.c | ||
| zed_disk_event.h | ||
| zed_event.c | ||
| zed_event.h | ||
| zed_exec.c | ||
| zed_exec.h | ||
| zed_file.c | ||
| zed_file.h | ||
| zed_log.c | ||
| zed_log.h | ||
| zed_strings.c | ||
| zed_strings.h | ||
| zed.c | ||
| zed.h | ||