diff options
Diffstat (limited to 'ev.pod')
| -rw-r--r-- | ev.pod | 18 |
1 files changed, 10 insertions, 8 deletions
@@ -584,19 +584,21 @@ immensely. This uses the Solaris 10 event port mechanism. As with everything on Solaris, it's really slow, but it still scales very well (O(active_fds)). -Please note that Solaris event ports can deliver a lot of spurious -notifications, so you need to use non-blocking I/O or other means to avoid -blocking when no data (or space) is available. - While this backend scales well, it requires one system call per active file descriptor per loop iteration. For small and medium numbers of file descriptors a "slow" C<EVBACKEND_SELECT> or C<EVBACKEND_POLL> backend might perform better. -On the positive side, with the exception of the spurious readiness -notifications, this backend actually performed fully to specification -in all tests and is fully embeddable, which is a rare feat among the -OS-specific backends (I vastly prefer correctness over speed hacks). +On the positive side, this backend actually performed fully to +specification in all tests and is fully embeddable, which is a rare feat +among the OS-specific backends (I vastly prefer correctness over speed +hacks). + +On the negative side, the interface is I<bizarre>, with the event polling +function sometimes returning events to the caller even though an error +occured, but with no indication whether it has done so or not (yes, it's +even documented that way) - deadly for edge-triggered interfaces, but +fortunately libev seems to be able to work around it. This backend maps C<EV_READ> and C<EV_WRITE> in the same way as C<EVBACKEND_POLL>. |