IF YOU WOULD LIKE TO GET AN ACCOUNT, please write an
email to Administrator. User accounts are meant only to access repo
and report issues and/or generate pull requests.
This is a purpose-specific Git hosting for
BaseALT
projects. Thank you for your understanding!
Только зарегистрированные пользователи имеют доступ к сервису!
Для получения аккаунта, обратитесь к администратору.
2007-09-29 More higher-level passing around of lp_ctx.
2007-09-29 Fix warning.
2007-09-29 Pass loadparm contexts on a higher level.
2007-09-29 Avoid using global loadparm context.
- Make the epoll_event_context_init() call fail if epoll_create() fails.
This should cause this backend to be skipped on host with epoll() in
libc but not in the kernel.
- At the moment, there is no sensible way to handle failures to add an
epoll() event, and 'fallback to select' is misnamed (so we now
abort()).
Andrew Bartlett
the epoll context which would then appear in the children. To fix this
we need to check for pid changes in more places. Luckily on platforms
where we have epoll(), getpid() is very very cheap.
includes a new EVENT_FD_AUTOCLOSE flag that prevents race conditions
where code using fd events might close a fd before releasing the
struct fd_event. That causes headaches for epoll.
- if someone adds a timed_event with a zero timeval
we now avoid serval gettimeofday() calls and the
event handler doesn't get the current time when it's
called, instead we also pass a zero timeval
- this also makes sure multiple timed events with a zero timeval
are processed in the order there're added.
the little benchmark shows that processing 2000000 directly timed events
is now much faster, while avoiding syscalls at all!
> time ./evtest (with the old code)
real 0m6.388s
user 0m1.740s
sys 0m4.632s
> time ./evtest (with the new code)
real 0m1.498s
user 0m1.496s
sys 0m0.004s
metze@SERNOX:~/devel/samba/4.0/samba4-ci/source> cat evtest.c
#include <stdio.h>
#include <stdint.h>
#include <sys/time.h>
#include <talloc.h>
#include <events.h>
static void dummy_fde_handler(struct event_context *ev_ctx, struct fd_event *fde,
uint16_t flags, void *private_data)
{
}
static void timeout_handler(struct event_context *ev, struct timed_event *te,
struct timeval tval, void *private_data)
{
uint32_t *countp = (uint32_t *)private_data;
(*countp)++;
if (*countp > 2000000) exit(0);
event_add_timed(ev, ev, tval, timeout_handler, countp);
}
int main(void)
{
struct event_context *ev;
struct timeval tval = { 0, 0 };
uint32_t count = 0;
ev = event_context_init(NULL);
event_add_fd(ev, ev, 0, 0, dummy_fde_handler, NULL);
event_add_timed(ev, ev, tval, timeout_handler, &count);
return event_loop_wait(ev);
}
This also adds some more headers to the list that is installed and a couple of extra #include lines so these
headers can be used externally without problems.
If this happens:
- two sockets are readable, and select/epoll/aio returns both of
them
- read event on socket1 is called
- inside that read event an event_loop_once is called, this returns that
socket2 is readable
- read event on socket2 is called
- event_loop_once returns
- top level event handler then calls read event on socket2 (as it
still has that listed as readable)
- read handler for socket2 returns zero byte read, which is
interpreted as end of file
- socket is incorrectly closed
this happened with ctdb, but it could happen anywhere (just
rarely). The fix is trivial - ensure we break out of the event loop
when we have been called recursively.
add support for sa_flags argument to event_add_signal(). These are
passed to sigaction(). Special handling is provided for SA_RESETHAND
(which tells the event system to remove the handler after the signal)
and SA_SIGINFO which allows the siginfo structure to be received per
signal
- fix epoll configure checks for the epoll and aio
events backends
- we should only activate the epoll backend if sys/epoll.h
and epoll_create() are found
- we should only activate the aio backend if sys/epoll.h, epoll_create(),
libaio.h and io_getevents() are found
hopefully fix the build on 'bnhtest' in the build farm...
metze
- make it easier to plug in a new events backend
- add simpler 'select' and 'epoll' backends
This is part of the effort to add good AIO support. The events_aio.c
backend is done, but sometimes dies with a SEGV, which is why it isn't
enabled yet.
epoll. It is not linked in anywhere yet - I'm committing it in case
anyone else wants to have a look at it.
The concept is quite strange really, but it seems to be the only way
that Linux 2.6.x can currently use a unified event model allowing for
AIO events and socket events to be waited for by a single unified
event wait function. You setup a epoll system, then setup a weird aio
event that points at the epoll system, then use io_getevents() to
actually do the waiting.
I'm hoping that kevents or a proper integration of epoll will allow us
to avoid ths rather hackish scheme, but meanwhile this is the only
path to proper AIO in Samba on Linux (without a horrible signals mess)
(NOTE: this code requires some kernel patches to work at the moment)
