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| | #!/usr/bin/env ruby
# -*- encoding: binary -*-
# Copyright (C) 2012-2016 all contributors <cmogstored-public@bogomips.org>
# License: GPLv3 or later (see COPYING for details)
require 'test/test_helper'
require 'timeout'
TEST_PROG = 'test/pwrite-wrap'
class TestPwriteWrap < Test::Unit::TestCase
def setup
@tmpdir = Dir.mktmpdir('cmogstored-pwrite-wrap-test')
@to_close = []
@host = TEST_HOST
srv = TCPServer.new(@host, 0)
@port = srv.addr[1]
srv.close
srv = TCPServer.new(@host, 0)
@mgmt_port = srv.addr[1]
srv.close
Dir.mkdir("#@tmpdir/dev666")
Dir.mkdir("#@tmpdir/dev333")
File.open("#@tmpdir/dev666/get.fid", "w") { |fp|
fp.seek(1000)
fp.write("\0")
}
@err = Tempfile.new("stderr")
cmd = [ TEST_PROG, "--docroot=#@tmpdir", "--httplisten=#@host:#@port",
"--mgmtlisten=#@host:#@mgmt_port", "--maxconns=500" ]
@slow_time = 5000
if vg = ENV["VALGRIND"]
cmd = vg.split(/\s+/).concat(cmd)
# valgrind slows everything down, so increase the sleep time
@slow_time *= 2
end
ENV["PWRITE_WRAP_SLOW_MSEC"] ||= (@slow_time * 2).to_s
@pid = fork {
$stderr.reopen(@err.path, "a")
@err.close
exec(*cmd)
}
@client = get_client
@mgmt_client = get_client(300, @mgmt_port)
@mgmt_client.write "server aio_threads = 1\r\n"
@mgmt_client.gets
warning = "fewer aio_threads(1) than devices(2)"
wait_for(30, warning) do
buf = File.read(@err.path)
buf.include?(warning)
end
end
def wait_for(sec, reason, res = 0.1)
stop = Time.now + sec
begin
return if yield
sleep res
end while Time.now < stop
assert false, reason
end
def test_pwrite_slow_chunked
__test_pwrite_slow(true)
end
def test_pwrite_slow_identity
__test_pwrite_slow(false)
end
def __test_pwrite_slow(chunked)
Process.kill(:VTALRM, @pid) # move knob to PWRITE_WRAP_SLOW
wait_for(5, 'move to slow knob', 0.01) do
File.readlines(@err.path).grep(/knob set: slow/)[0]
end
Process.kill(:TTIN, @pid) # turn on the switch for where the knob is
wait_for(5, 'enable slow knob', 0.01) do
File.readlines(@err.path).grep(/flag set: slow/)[0]
end
client_2 = get_client
thr = Thread.new do
begin
size = 100 * 1024 * 1024
if chunked
@client.write("PUT /dev666/foo.fid HTTP/1.1\r\n" \
"Host: example.com\r\n" \
"Transfer-Encoding: chunked\r\n\r\n" \
"#{'%x' % size}\r\n")
else
@client.write("PUT /dev666/foo.fid HTTP/1.0\r\n" \
"Content-Length: #{size}\r\n\r\n")
end
IO.copy_stream("/dev/zero", @client, size)
rescue => err
end
err
end
wait_for(5, "temporary file to exist", 0.05) do
Dir["#@tmpdir/dev666/foo.*tmp"][0]
end
t_yield
# this should cause mog_ioq_contended to return true in http_put.c
a = Time.now
Timeout.timeout(@slow_time * 4) {
client_2.write("GET /dev666/get.fid HTTP/1.0\r\n\r\n")
assert_match(%r{HTTP/1\.1 200 OK}, client_2.gets)
}
diff = Time.now - a
assert_operator diff, :<, (@slow_time * 2), "diff=#{diff}"
@client.shutdown
thr.join
Process.kill(:TTOU, @pid)
wait_for(5, "clear slow flag") do
File.readlines(@err.path).grep(/flag set: slow/)[0]
end
end
def teardown
Process.kill(:QUIT, @pid) rescue nil
_, status = Process.waitpid2(@pid)
@to_close.each { |io| io.close unless io.closed? }
FileUtils.rm_rf(@tmpdir)
@err.rewind
$stderr.write(@err.read) if $DEBUG
assert status.success?, status.inspect
end
# this test is horribly slow under valgrind, and we probably don't need
# valgrind, here...
end if File.exist?(TEST_PROG) && ! ENV["VALGRIND"]
|