pacman.operations.router_compressors package

Subpackages

• pacman.operations.router_compressors.ordered_covering_router_compressor package
  • Module contents
    • Ordered Covering
      • Background
      • Merging routing table entries
      • “Ordered Covering”
    • Implementation API

Module contents

class pacman.operations.router_compressors.AbstractCompressor(ordered=True, accept_overflow=False)

Bases: object

compress_table(router_table)

Parameters:router_table (UnCompressedMulticastRoutingTable) – Original routing table for a single chip Returns:Raw compressed routing table entries for the same chip Return type:list(Entry)

compress_tables(router_tables, progress)

Compress all the unordered routing tables.

Tables who start of smaller than target_length are not compressed

Parameters:

• router_tables (MulticastRoutingTables) – Routing tables
• progress (ProgressBar) – Progress bar to show while working

Returns:

The compressed but still unordered routing tables

Return type:

MulticastRoutingTables

Raises:

MinimisationFailedError – on failure

class pacman.operations.router_compressors.Entry(key, mask, defaultable, spinnaker_route)

Bases: object

Parameters:

• key (int) –
• mask (int) –
• defaultable (bool) –
• spinnaker_route (int) –

defaultable

static from_MulticastRoutingEntry(mre)

Parameters:mre (MulticastRoutingEntry) – Return type:Entry

key

mask

spinnaker_route

to_MulticastRoutingEntry()

Return type:MulticastRoutingEntry

pacman.operations.router_compressors.pair_compressor(ordered=True, accept_overflow=False, verify=False)

Parameters:

• accept_overflow (bool) – A flag which should only be used in testing to stop raising an exception if result is too big
• verify (bool) – If set to true will verify the length before returning

Return type:

MulticastRoutingTables

class pacman.operations.router_compressors.RangeCompressor

Bases: object

compress_table(uncompressed)

Compresses all the entries for a single table.

Compressed the entries for this unordered table returning a new table with possibly fewer entries

Parameters:uncompressed (UnCompressedMulticastRoutingTable) – Original Routing table for a single chip Returns:Compressed routing table for the same chip Return type:list(Entry)

static cut_off(key, power)

static next_power(number)

pacman.operations.router_compressors.range_compressor(accept_overflow=True)

Parameters:

• router_tables (MulticastRoutingTables) –
• accept_overflow (bool) – A flag which should only be used in testing to stop raising an exception if result is too big

Return type:

MulticastRoutingTables