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local lanes = require "lanes"
lanes.configure{ with_timers = false, keepers_gc_threshold=30000 }
-- set TEST1, PREFILL1, FILL1, TEST2, PREFILL2, FILL2 from the command line
-- Lua 5.1/5.2 compatibility
local table_unpack = unpack or table.unpack
local finalizer = function(err, stk)
if err == lanes.cancel_error then
-- note that we don't get the cancel_error when running wrapped inside a protected call if it doesn't rethrow it
print(" laneBody after cancel" )
elseif err then
print(" laneBody error: "..tostring(err))
else
print(" laneBody finalized")
end
end
--##################################################################################################
-- this lane eats items in the linda one by one
local eater = function( l, loop)
set_finalizer(finalizer)
-- wait for start signal
l:receive( "go")
-- eat data one by one
for i = 1, loop do
local key, val = l:receive( "key")
-- print("eater:", val)
end
-- print "loop is over"
key, val = l:receive( "done")
print("eater: done ("..val..")")
end
--##################################################################################################
-- this lane eats items in the linda in batches
local gobbler = function( l, loop, batch)
set_finalizer(finalizer)
-- wait for start signal
l:receive( "go")
-- eat data in batches
for i = 1, loop/batch do
l:receive( l.batched, "key", batch)
-- print("gobbler:", batch)
end
print "loop is over"
key, val = l:receive( "done")
print("gobbler: done ("..val..")")
end
--##################################################################################################
local lane_eater_gen = lanes.gen( "*", {priority = 3}, eater)
local lane_gobbler_gen = lanes.gen( "*", {priority = 3}, gobbler)
--##################################################################################################
-- main thread writes data while a lane reads it
local function ziva( preloop, loop, batch)
-- prefill the linda a bit to increase fifo stress
local top = math.max( preloop, loop)
local l, lane = lanes.linda()
local t1 = lanes.now_secs()
for i = 1, preloop do
l:send( "key", i)
end
print( "stored " .. l:count( "key") .. " items in the linda before starting consumer lane")
if batch > 0 then
if l.batched then
lane = lane_gobbler_gen( l, top, batch)
else
print "no batch support in this version of Lanes"
lane = lane_eater_gen( l, top)
end
else
lane = lane_eater_gen( l, top)
end
-- tell the consumer lane it can start eating data
l:send( "go", true)
-- send the remainder of the elements while they are consumed
-- create a function that can send several values in one shot
batch = math.max( batch, 1)
local batch_values = {}
for i = 1, batch do
table.insert( batch_values, i)
end
local batch_send_log = "main: sending "..batch.." values"
local batch_send = function()
-- print(batch_send_log)
l:send( "key", table_unpack( batch_values))
end
if loop > preloop then
for i = preloop + 1, loop, batch do
batch_send()
end
end
l:send( "done" ,"are you happy?")
lane:join()
return lanes.now_secs() - t1
end
--##################################################################################################
TEST1 = TEST1 or 1000
PREFILL1 = PREFILL1 or 10000
FILL1 = FILL1 or 2000000
local tests1 =
{
{ PREFILL1, FILL1, 0},
{ PREFILL1, FILL1, 1},
{ PREFILL1, FILL1, 2},
{ PREFILL1, FILL1, 3},
{ PREFILL1, FILL1, 5},
{ PREFILL1, FILL1, 8},
{ PREFILL1, FILL1, 13},
{ PREFILL1, FILL1, 21},
{ PREFILL1, FILL1, 44},
{ PREFILL1, FILL1, 65},
}
print "############################################ tests #1"
for i, v in ipairs( tests1) do
if i > TEST1 then break end
local pre, loop, batch = v[1], v[2], v[3]
print("-------------------------------------------------\n")
print("START", "prefill="..pre, "fill="..loop, "batch="..batch)
print("DURATION = " .. ziva( pre, loop, batch) .. "\n")
end
--##################################################################################################
-- sequential write/read (no parallelization involved)
local function ziva2( preloop, loop, batch)
local l = lanes.linda()
-- prefill the linda a bit to increase fifo stress
local top, step = math.max( preloop, loop), (l.batched and batch) and batch or 1
local batch_send, batch_read
if l.batched and batch then
local batch_values = {}
for i = 1, batch do
table.insert( batch_values, i)
end
-- create a function that can send several values in one shot
batch_send = function()
l:send( "key", table_unpack( batch_values))
end
batch_read = function()
l:receive( l.batched, "key", batch)
end
else -- not batched
batch_send = function()
l:send( "key", top)
end
batch_read = function()
l:receive( "key")
end
end
local t1 = lanes.now_secs()
-- first, prime the linda with some data
for i = 1, preloop, step do
batch_send()
end
print( "stored " .. (l:count( "key") or 0) .. " items in the linda before starting the alternating reads and writes")
-- loop that alternatively sends and reads data off the linda
if loop > preloop then
for i = preloop + 1, loop, step do
batch_send()
batch_read()
end
end
-- here, we have preloop elements still waiting inside the linda
for i = 1, preloop, step do
batch_read()
end
return lanes.now_secs() - t1
end
--##################################################################################################
TEST2 = TEST2 or 1000
PREFILL2 = PREFILL2 or 0
FILL2 = FILL2 or 4000000
local tests2 =
{
{ PREFILL2, FILL2},
{ PREFILL2, FILL2, 1},
{ PREFILL2, FILL2, 2},
{ PREFILL2, FILL2, 3},
{ PREFILL2, FILL2, 5},
{ PREFILL2, FILL2, 8},
{ PREFILL2, FILL2, 13},
{ PREFILL2, FILL2, 21},
{ PREFILL2, FILL2, 44},
{ PREFILL2, FILL2, 65},
}
print "############################################ tests #2"
for i, v in ipairs( tests2) do
if i > TEST2 then break end
local pre, loop, batch = v[1], v[2], v[3]
print("-------------------------------------------------\n")
print("START", "prefill="..pre, "fill="..loop, "batch="..(batch or "no"))
print("DURATION = " .. ziva2( pre, loop, batch) .. "\n")
end
print "############################################"
print "THE END"
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