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author | normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-01-18 18:23:49 +0000 |
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committer | normal <normal@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-01-18 18:23:49 +0000 |
commit | ad55b68156927e9dd9076f48521fb54a02e9260f (patch) | |
tree | 04eaa69e521023a5d0c4a2fc2febc8013f59bc19 | |
parent | d70a53e1c5d8aac165b14435a45e3808557ff874 (diff) | |
download | ruby-ad55b68156927e9dd9076f48521fb54a02e9260f.tar.gz |
another benchmark for IO.copy_stream socket writing
For testing Linux socket-only workaround for
https://bugs.ruby-lang.org/issues/13085
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57364 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
-rw-r--r-- | benchmark/bm_io_copy_stream_write_socket.rb | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/benchmark/bm_io_copy_stream_write_socket.rb b/benchmark/bm_io_copy_stream_write_socket.rb new file mode 100644 index 0000000000..11f369bd0d --- /dev/null +++ b/benchmark/bm_io_copy_stream_write_socket.rb @@ -0,0 +1,35 @@ +# The goal of this is to use a synthetic (non-IO) reader +# to trigger the read/write loop of IO.copy_stream, +# bypassing in-kernel mechanisms like sendfile for zero copy, +# so we wrap the /dev/zero IO object: +class Zero + def initialize + @n = 100000 + @in = File.open('/dev/zero', 'rb') + end + + def read(len, buf) + return if (@n -= 1) == 0 + @in.read(len, buf) + end +end + +begin + require 'socket' + src = Zero.new + rd, wr = UNIXSocket.pair + pid = fork do + wr.close + buf = String.new + while rd.read(16384, buf) + end + end + rd.close + IO.copy_stream(src, wr) +rescue Errno::ENOENT, NotImplementedError, NameError + # not *nix: missing /dev/zero, fork, or UNIXSocket +rescue LoadError # no socket? +ensure + wr.close if wr + Process.waitpid(pid) if pid +end if IO.respond_to?(:copy_stream) |