[Gems-users] about network stats

[Michael Zhen WANG <zhen.wang@xxxxxxxx>]

Hi,

I am using hierarchical switch topology and MOSI_SMP_bcastprotocol. In one processor case, I got the following network stats. (I deleted the utilization part)

switch_0_inlinks: 1
switch_0_outlinks: 1
  outgoing_messages_switch_0_link_0_Control: 15049 120392 [ 15049 0 0 0 ] base_latency: 1

switch_1_inlinks: 1
switch_1_outlinks: 1
  outgoing_messages_switch_1_link_0_Data: 15049 1083528 [ 0 15049 0 0 ] base_latency: 1

switch_2_inlinks: 2
switch_2_outlinks: 2
  outgoing_messages_switch_2_link_0_Control: 15049 120392 [ 15049 0 0 0 ] base_latency: 1
  outgoing_messages_switch_2_link_0_Data: 15049 1083528 [ 0 15049 0 0 ] base_latency: 1
  outgoing_messages_switch_2_link_1_Control: 15049 120392 [ 15049 0 0 0 ] base_latency: 1


>From previous posts, someone said that 1 switch is for processor, 1 switch is for L2 bank and others are internal switches. But isn't processor only connected to L1 caches? From the figure of ruby on gems wiki, L1, L2 and directory/memory are connected to the network. In the one processor case, how to interpret the switches?

Here, I think switch 2 should be the internal one. But how can switch 2 has 2 links containing control messages?

In the multi-processor case, there is one L2 cache for each chip. Are those L2 caches shared or private? I haven't seen any specification of this.

Thank you for the help!

Best
-Zhen

-- 
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Zhen WANG
Ph.D. Student
Department of Electrical and Computer Engineering
Rice University, Houston, Texas
http://www.owlnet.rice.edu/~zw3/
http://www.recg.org/
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