Add a per-event loop flag for blocking SIGPROF signals when polling for
events.
The motivation for this addition is to reduce the number of wakeups and
subsequent clock_gettime() system calls when using a sampling profiler.
On Linux, this switches from epoll_wait() to epoll_pwait() when enabled.
Other platforms bracket the poll syscall with pthread_sigmask() calls.
Refs strongloop/strong-agent#3 and strongloop-internal/scrum-cs#37.
PR-URL: https://github.com/libuv/libuv/pull/15
Reviewed-By: Saúl Ibarra Corretgé <saghul@gmail.com>
linux-syscalls.h assumes that on all Linux platforms the value
of O_NONBLOCK is the same as SOCK_NONBLOCK.
This commit fixes it, as it is at least not true for hppa, and
resolves#1442.
Signed-off-by: Luca Bruno <lucab@debian.org>
sizeof(sigset_t) = 128 whereas the kernel expects 8, the size of a long.
It made the system call fail with EINVAL when a non-NULL sigset was
passed in. Fortunately, it's academic because there is just one call
site and it passes in NULL.
Fixeslibuv/libuv#4.
Changes since version 0.10.28:
* darwin: allocate enough space for select() hack (Fedor Indutny)
* linux: try epoll_pwait if epoll_wait is missing (Michael Hudson-Doyle)
* windows: map ERROR_INVALID_DRIVE to UV_ENOENT (Saúl Ibarra Corretgé)
It seems that epoll_wait is implemented in glibc in terms of epoll_pwait and
new architectures (like arm64) do not implement the epoll_wait syscall at all.
So if epoll_wait errors with ENOSYS, just call epoll_pwait.
This is a backport of 861de3d71d for v0.10
branch.
`fd_set`s are way too small for `select()` hack when stream's fd is
bigger than 1023. Make `fd_set`s a part of `uv__stream_select_t`
structure.
fix#1461
Conflicts:
src/unix/stream.c
Changes since version 0.10.27:
* windows: fix handling closed socket while poll handle is closing (Saúl
Ibarra Corretgé)
* unix: return system error on EAI_SYSTEM (Saúl Ibarra Corretgé)
* unix: fix bogus structure field name (Saúl Ibarra Corretgé)
* darwin: invoke `mach_timebase_info` only once (Fedor Indutny)
According to @aktau, the call to `mach_timebase_info` costs 90% of the
total execution time of `uv_hrtime()`. The result of the call is static
on all existing platforms, so there is no need in invoking it multiple
times.
Signed-off-by: Fedor Indutny <fedor@indutny.com>
Invalidate file descriptor when closing `uv_fs_event_t` handle. Note
that `uv__io_stop` is just removing `fd` from `loop->watchers` and not
actually invalidating all consequent events in a `kevent()` results.
fixjoyent/node#1101
If the same file description is open in two different processes, then
closing the file descriptor is not sufficient to deregister it from the
epoll instance (as described in epoll(7)), resulting in spurious events
that cause the event loop to spin repeatedly. So always explicitly
deregister it.
Fixes#1099.
Conflicts:
test/test-spawn.c
The event_handle field of unused accept requests was not being
initialized properly. As a result, uv_tcp_endgame would try to close
an invalid handle and this could lead to unexpected behavior.
This fixes node.js test test-cluster-disconnect.js on Windows.
Changed the order of the member assignments since the thread
may start before the parameters are assigned. This especially
happens when the osx scheduler is very busy.
