Hi, Is there a way to monitor PCI bus activity using DTrace? I''m able to obtain the following counters through the busstat command: 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 Just wondering if DTrace can provide more than this. Thanks, -Kalyan