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Memory part 7: Memory performance tools
Memory part 7: Memory performance tools
Posted Nov 15, 2007 12:20 UTC (Thu) by Ponto (guest, #49056)Parent article: Memory part 7: Memory performance tools
I am wondering what performance counters one has to monitor with oprofile to get cache synchronization events on opteron and xeon 64 bit machines. I could not find any reading through the available events on the oprofile homepage. I am especially interessted in detecting cache-ping-pong situations.
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Memory part 7: Memory performance tools
Posted Nov 17, 2007 21:39 UTC (Sat) by anton (guest, #25547) [Link]
I would write a small program that does cache ping-pong, and then look at which events are counted. For the "AMD64" events I would especially look at DATA_CACHE_REFILLS_FROM_SYSTEM and DATA_CACHE_LINES_EVICTED with various combinations of cache states for the Unit Mask options. PIPELINE_RESTART_DUE_TO_PROBE_HIT, DCACHE_MISS_LOCKED_INSTRUCTIONS, SYSTEM_READ_RESPONSES, CACHE_BLOCK_COMMANDS, PROBE_RESPONSES_AND_UPSTREAM_REQUESTS and HYPERTRANSPORT_LINK*_BANDWIDTH are probably also relevant.