[ruby-cvs:73160] normal:r66060 (trunk): io.c (rb_update_max_fd): use F_GETFL if possible
normal at ruby-lang.org
normal at ruby-lang.org
Wed Nov 28 10:10:40 JST 2018
normal 2018-11-28 10:10:40 +0900 (Wed, 28 Nov 2018)
New Revision: 66060
https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=66060
Log:
io.c (rb_update_max_fd): use F_GETFL if possible
On 64-bit Linux, fstat() needs to fill out a 144 byte struct
while F_GETFL only needs to return 8 bytes.
Fwiw, F_GETFD requires an additional rcu_read_lock and bitmap
check; so it's obviously more expensive than F_GETFL on Linux.
Reduce stack usage of rb_update_max_fd from 184 to 24 bytes.
Modified files:
trunk/io.c
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