Class: Pwrake::LocalityAwareQueue
Instance Attribute Summary
Attributes inherited from TaskQueue
#enable_steal
Instance Method Summary
collapse
Methods inherited from TaskQueue
#_qstr, #deq_noaction_task, #deq_task, #deq_turn, #enq, #enq_body, #initialize
Instance Method Details
#clear ⇒ Object
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# File 'lib/pwrake/queue/locality_aware_queue.rb', line 165
def clear
@q_no_action.clear
@q_reserved.clear
@q.each{|h,q| q.clear}
@size_q = 0
@q_remote.clear
end
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#deq_impl(host_info, turn) ⇒ Object
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# File 'lib/pwrake/queue/locality_aware_queue.rb', line 68
def deq_impl(host_info, turn)
host = host_info.name
case turn
when 0
if t = @q_no_action.shift
Log.debug "deq_no_action task=#{t&&t.name} host=#{host}"
return t
elsif t = deq_locate(host_info,host_info)
Log.debug "deq_locate task=#{t&&t.name} host=#{host}"
return t
elsif t = @q_remote.shift(host_info)
Log.debug "deq_remote task=#{t&&t.name}"
return t
else
nil
end
when 1
if t = deq_steal(host_info)
Log.debug "deq_steal task=#{t&&t.name} host=#{host}"
return t
else
nil
end
end
end
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#deq_locate(q_host, run_host) ⇒ Object
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# File 'lib/pwrake/queue/locality_aware_queue.rb', line 94
def deq_locate(q_host,run_host)
q = @q[q_host.id]
if q && !q.empty?
t = q.shift(run_host)
if t
t.assigned.each do |h|
if q_h = @q[h]
q_h.delete(t)
end
end
@size_q -= 1
end
return t
else
nil
end
end
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#deq_steal(host_info) ⇒ Object
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# File 'lib/pwrake/queue/locality_aware_queue.rb', line 112
def deq_steal(host_info)
max_host = nil
max_num = 0
@q_group[host_info.id].each do |qg|
qg.each do |h,a|
if !a.empty?
d = a.size
if d > max_num
max_host = h
max_num = d
end
end
end
if max_num > 0
max_info = @hostinfo_by_id[max_host]
t = host_info.steal_phase{|h| deq_locate(max_info,h)}
if t
Log.debug "deq_steal max_host=#{max_info.name} max_num=#{max_num}"
return t
end
end
end
nil
end
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#drop_host(host_info) ⇒ Object
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# File 'lib/pwrake/queue/locality_aware_queue.rb', line 180
def drop_host(host_info)
hid = host_info.id
if q_drop = @q.delete(hid)
n_move = 0
q_size = q_drop.size
while t = q_drop.shift
assigned_other = false
t.assigned.each do |h|
if h != hid && @q[h]
assigned_other = true
break
end
end
if !assigned_other
@size_q -= 1
@q_remote.push(t)
n_move += 1
end
end
Log.debug "LAQ#drop_host: host=#{host_info.name} q.size=#{q_size} n_move=#{n_move}"
end
end
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#empty? ⇒ Boolean
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# File 'lib/pwrake/queue/locality_aware_queue.rb', line 173
def empty?
@size_q == 0 &&
@q_no_action.empty? &&
@q_reserved.empty? &&
@q_remote.empty?
end
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#enq_impl(t) ⇒ Object
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# File 'lib/pwrake/queue/locality_aware_queue.rb', line 27
def enq_impl(t)
hints = t && t.suggest_location
Log.debug "enq #{t.name} hints=#{hints.inspect}"
if hints.nil? || hints.empty?
@q_remote.push(t)
else
kv = {}
hints.each do |h|
HostMap.ipmatch_for_name(h).each{|id| kv[id] = true}
end
q_success = false
if !kv.empty?
kv.each_key do |id|
q = @q[id]
if q
q.push(t)
q_success = true
t.assigned.push(id)
else
Log.warn("lost queue for host id=#{id.inspect}: @q.keys=#{@q.keys.inspect}")
end
end
end
if q_success
@size_q += 1
else
@q_remote.push(t)
end
end
@last_enq_time = Time.now
end
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#init_queue(group_map = nil) ⇒ Object
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# File 'lib/pwrake/queue/locality_aware_queue.rb', line 5
def init_queue(group_map=nil)
@size_q = 0
@q = {}
@hostinfo_by_id.each do |id,h|
@q[id] = @array_class.new(h.ncore)
end
@q_group = {}
group_map ||= {1=>@hostinfo_by_id.map{|id,h| id}}
group_map.each do |gid,ary|
q1 = {}
q2 = @q.dup
ary.each{|hid| q1[hid] = q2.delete(hid)}
a = [q1,q2]
ary.each{|hid| @q_group[hid] = a}
end
@q_remote = @array_class.new(0)
@disable_steal = Rake.application.pwrake_options['DISABLE_STEAL']
@last_enq_time = Time.now
@n_turn = @disable_steal ? 1 : 2
end
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#inspect_q ⇒ Object
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# File 'lib/pwrake/queue/locality_aware_queue.rb', line 140
def inspect_q
s = _qstr("noaction",@q_no_action)
if @size_q == 0
n = @q.size
else
n = 0
@q.each do |h,q|
if q.size > 0
hinfo = @hostinfo_by_id[h]
if hinfo
s << _qstr(hinfo.name,q)
else
s << _qstr("(#{hinfo.inspect})",q)
end
else
n += 1
end
end
end
s << _qstr("local*#{n}",[]) if n > 0
s << _qstr("remote",@q_remote)
s << "@size_q=#{@size_q}"
s
end
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#turn_empty?(turn) ⇒ Boolean
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# File 'lib/pwrake/queue/locality_aware_queue.rb', line 59
def turn_empty?(turn)
case turn
when 0
@q_no_action.empty? && @size_q == 0 && @q_remote.empty?
when 1
@size_q == 0
end
end
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