Howdy,
I have been playing around with busstat, and must say that this is a
really really cool utility! To get an idea of what the event counters
mean, I started reading through a PCI reference and the following website:
http://www.readol.net/books/computer/system/System.Performance.Tuning.Second.Edition/059600284x/spt2-CHP-3-SECT-6.html
This website mentions that the value "dvma_bytes_xfr" could be used to get
the number of bytes transferred on SBUS-based machines. Upon inspecting
the busstat events on a Sun 280R, I didn't notice a similar event:
$ busstat -e pcis0
pic0
dvma_stream_rd
dvma_stream_wr
dvma_const_rd
dvma_const_wr
dvma_stream_buf_mis
dvma_cycles
dvma_wd_xfr
pio_cycles
dvma_tlb_misses
interrupts
saf_inter_nack
pio_reads
pio_writes
dvma_rd_buf_timeout
dvma_rd_rtry_stc
dvma_wr_rtry_stc
dvma_rd_rtry_nonstc
dvma_wr_rtry_nonstc
E*_slow_transitions
E*_slow_cycles_per_64
Are the events documented anywhere by any chance? Is there anything
equivalent to "dvma_bytes_xfr" to get the number of bytes transmitted
on a PCI bus?
Thanks for any insight,
- Ryan
--
UNIX Administrator
http://daemons.net/~matty
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