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local lanes = require "lanes"
lanes.configure()
-- Lua 5.1/5.2 compatibility
local table_unpack = unpack or table.unpack
-- this lane eats items in the linda one by one
local eater = function( l, loop)
local key, val = l:receive( "go")
for i = 1, loop do
local val, key = l:receive( "key")
--print( val)
end
-- print "loop is over"
key, val = l:receive( "done")
-- print( val)
end
-- this lane eats items in the linda in batches
local batched = function( l, loop, batch)
local key, val = l:receive( "go")
for i = 1, loop/batch do
l:receive( l.batched, "key", batch)
end
print "loop is over"
key, val = l:receive( "done")
print( val)
end
local lane_eater_gen = lanes.gen( "*", eater)
local lane_batched_gen = lanes.gen( "*", batched)
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 = os.time()
for i = 1, preloop do
l:send( "key", i)
end
print( l:count( "key"))
if batch then
if l.batched then
lane = lane_batched_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 lanes they can start eating data
l:send("go", "go")
-- send the remainder of the elements while they are consumed
if loop > preloop then
for i = preloop + 1, loop do
l:send( "key", i)
end
end
l:send( "done" ,"are you happy?")
lane:join()
return os.difftime(os.time(), t1)
end
local tests =
{
--[[{ 2000000, 0},
{ 3000000, 0},
{ 4000000, 0},
{ 5000000, 0},
{ 6000000, 0},]]
--[[{ 1000000, 2000000},
{ 2000000, 3000000},
{ 3000000, 4000000},
{ 4000000, 5000000},
{ 5000000, 6000000},]]
--[[{ 4000000, 0},
{ 4000000, 0, 1},
{ 4000000, 0, 2},
{ 4000000, 0, 3},
{ 4000000, 0, 5},
{ 4000000, 0, 8},
{ 4000000, 0, 13},
{ 4000000, 0, 21},
{ 4000000, 0, 44},]]
}
for k, v in pairs( tests) do
local pre, loop, batch = v[1], v[2], v[3]
print( pre, loop, batch, "duration = " .. ziva( pre, loop, batch))
end
--[[
V 2.1.0:
ziva( 20000, 0) -> 4s ziva( 10000, 20000) -> 3s
ziva( 30000, 0) -> 8s ziva( 20000, 30000) -> 7s
ziva( 40000, 0) -> 15s ziva( 30000, 40000) -> 15s
ziva( 50000, 0) -> 24s ziva( 40000, 50000) -> 23s
ziva( 60000, 0) -> 34s ziva( 50000, 60000) -> 33s
SIMPLIFIED:
ziva( 20000, 0) -> 4s ziva( 10000, 20000) -> 3s
ziva( 30000, 0) -> 9s ziva( 20000, 30000) -> 8s
ziva( 40000, 0) -> 15s ziva( 30000, 40000) -> 15s
ziva( 50000, 0) -> 25s ziva( 40000, 50000) -> 24s
ziva( 60000, 0) -> 35s ziva( 50000, 60000) -> 35s
FIFO:
ziva( 2000000, 0) -> 9s ziva( 1000000, 2000000) -> 33s
ziva( 3000000, 0) -> 14s ziva( 2000000, 3000000) -> 40s
ziva( 4000000, 0) -> 20s ziva( 3000000, 4000000) -> 27s
ziva( 5000000, 0) -> 24s ziva( 4000000, 5000000) -> 42s
ziva( 6000000, 0) -> 29s ziva( 5000000, 6000000) -> 55s
FIFO BATCHED:
ziva( 4000000, 0, 1) -> 20s
ziva( 4000000, 0, 2) -> 11s
ziva( 4000000, 0, 3) -> 7s
ziva( 4000000, 0, 5) -> 5s
ziva( 4000000, 0, 8) -> 3s
ziva( 4000000, 0, 13) -> 3s
ziva( 4000000, 0, 21) -> 3s
ziva( 4000000, 0, 44) -> 2s
]]
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 = os.time()
-- first, prime the linda with some data
for i = 1, preloop, step do
batch_send()
end
-- 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 os.difftime(os.time(), t1)
end
local tests2 =
{
--[[{ 2000000, 0},
{ 3000000, 0},
{ 4000000, 0},
{ 5000000, 0},
{ 6000000, 0},
{ 1000000, 2000000},
{ 2000000, 3000000},
{ 3000000, 4000000},
{ 4000000, 5000000},
{ 5000000, 6000000},]]
{ 4000000, 0},
{ 4000000, 0, 1},
{ 4000000, 0, 2},
{ 4000000, 0, 3},
{ 4000000, 0, 5},
{ 4000000, 0, 8},
{ 4000000, 0, 13},
{ 4000000, 0, 21},
{ 4000000, 0, 44},
}
for k, v in pairs( tests2) do
local pre, loop, batch = v[1], v[2], v[3]
print( pre, loop, batch, "duration = " .. ziva2( pre, loop, batch))
end
--[[
V 2.1.0:
ziva( 20000, 0) -> 3s ziva( 10000, 20000) -> 3s
ziva( 30000, 0) -> 8s ziva( 20000, 30000) -> 7s
ziva( 40000, 0) -> 15s ziva( 30000, 40000) -> 14s
ziva( 50000, 0) -> 24s ziva( 40000, 50000) -> 22s
ziva( 60000, 0) -> 34s ziva( 50000, 60000) -> 33s
SIMPLIFIED:
ziva( 20000, 0) -> 4s ziva( 10000, 20000) -> 3s
ziva( 30000, 0) -> 8s ziva( 20000, 30000) -> 7s
ziva( 40000, 0) -> 14s ziva( 30000, 40000) -> 14s
ziva( 50000, 0) -> 23s ziva( 40000, 50000) -> 22s
ziva( 60000, 0) -> 33s ziva( 50000, 60000) -> 32s
FIFO:
ziva( 2000000, 0) -> 9s ziva( 1000000, 2000000) -> 14s
ziva( 3000000, 0) -> 14s ziva( 2000000, 3000000) -> 23s
ziva( 4000000, 0) -> 19s ziva( 3000000, 4000000) -> 23s
ziva( 5000000, 0) -> 24s ziva( 4000000, 5000000) -> 32s
ziva( 6000000, 0) -> 29s ziva( 5000000, 6000000) -> 33s
FIFO BATCHED:
ziva( 4000000, 0, 1) -> 19s
ziva( 4000000, 0, 2) -> 11s
ziva( 4000000, 0, 3) -> s
ziva( 4000000, 0, 5) -> s
ziva( 4000000, 0, 8) -> s
ziva( 4000000, 0, 13) -> s
ziva( 4000000, 0, 21) -> s
ziva( 4000000, 0, 44) -> s
]]
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