0 Replies Latest reply: Jul 9, 2008 4:21 PM by 807557 RSS

    T6320 and T2 chip performance

    807557
      Currently have a T6320 in house for analysis and have see a few problems, one that concerns me is the busstat entry show bank_busy_stalls even though the system is not running any application or database work. This is drastically different than the T2000 T1 chips which show little to no bank_busy_stalls. The T6320 shows bank_busy_stalls even when in single user mode. i'm curious if anyone else has see this. Displays below show the problem and difference between T1 and T2 chips.


      T2 chip on T6320

      root@btcresast001p [ueng/admin] #uname -a
      SunOS btcresast001p 5.10 Generic_127127-11 sun4v sparc SUNW,Sun-Blade-T6320

      10 dram0 bank_busy_stalls 7534514 mem_read_write 283433
      10 dram1 bank_busy_stalls 4187074 mem_read_write 194158
      10 dram2 bank_busy_stalls 1030315 mem_read_write 110389
      10 dram3 bank_busy_stalls 917234 mem_read_write 107403
      11 dram0 bank_busy_stalls 7369045 mem_read_write 277615
      11 dram1 bank_busy_stalls 4009203 mem_read_write 188124
      11 dram2 bank_busy_stalls 873511 mem_read_write 104982
      11 dram3 bank_busy_stalls 744779 mem_read_write 101568
      12 dram0 bank_busy_stalls 7287151 mem_read_write 275143
      12 dram1 bank_busy_stalls 3941897 mem_read_write 186088
      12 dram2 bank_busy_stalls 798212 mem_read_write 102775
      12 dram3 bank_busy_stalls 645738 mem_read_write 98586
      13 dram0 bank_busy_stalls 7254574 mem_read_write 274191
      13 dram1 bank_busy_stalls 3908184 mem_read_write 185059
      13 dram2 bank_busy_stalls 756515 mem_read_write 101517
      13 dram3 bank_busy_stalls 608405 mem_read_write 97477
      14 dram0 bank_busy_stalls 7523265 mem_read_write 282140
      14 dram1 bank_busy_stalls 4177341 mem_read_write 192986
      14 dram2 bank_busy_stalls 1025220 mem_read_write 109256
      14 dram3 bank_busy_stalls 883739 mem_read_write 105502
      15 dram0 bank_busy_stalls 7321499 mem_read_write 276185
      15 dram1 bank_busy_stalls 3974115 mem_read_write 187006
      15 dram2 bank_busy_stalls 807931 mem_read_write 103069
      15 dram3 bank_busy_stalls 683346 mem_read_write 99650


      Even in single user mode


      root@btcresast001p [ueng/admin] #who -r
      . run-level S Jul 8 07:10 S 0 0
      root@btcresast001p [ueng/admin] #./busstat_4drams.ksh
      time dev event0 pic0 event1 pic1
      1 dram0 bank_busy_stalls 7681005 mem_read_write 287708
      1 dram1 bank_busy_stalls 4322578 mem_read_write 198250
      1 dram2 bank_busy_stalls 1167753 mem_read_write 114474
      1 dram3 bank_busy_stalls 1045236 mem_read_write 111209
      2 dram0 bank_busy_stalls 7411142 mem_read_write 279165
      2 dram1 bank_busy_stalls 3990810 mem_read_write 187767
      2 dram2 bank_busy_stalls 839895 mem_read_write 104254
      2 dram3 bank_busy_stalls 717927 mem_read_write 100947
      3 dram0 bank_busy_stalls 7351305 mem_read_write 276874
      3 dram1 bank_busy_stalls 3914980 mem_read_write 185376
      3 dram2 bank_busy_stalls 762216 mem_read_write 101697
      3 dram3 bank_busy_stalls 647350 mem_read_write 98678
      root@btcresast001p [ueng/admin] #

      There appears to be a lot of memory bank reads occurring but nothing is really running in the system

      root@btcresast001p [ueng/admin] #./busstat_read.ksh
      time dev event0 pic0 event1 pic1
      1 dram0 mem_reads 292179 mem_read_write 298603
      1 dram1 mem_reads 200113 mem_read_write 206299
      1 dram2 mem_reads 116382 mem_read_write 122718
      1 dram3 mem_reads 113222 mem_read_write 119423
      2 dram0 mem_reads 284606 mem_read_write 286411
      2 dram1 mem_reads 192463 mem_read_write 194428
      2 dram2 mem_reads 108020 mem_read_write 109853
      2 dram3 mem_reads 105796 mem_read_write 107926
      3 dram0 mem_reads 283514 mem_read_write 284733
      3 dram1 mem_reads 189129 mem_read_write 190046
      3 dram2 mem_reads 105654 mem_read_write 106584
      3 dram3 mem_reads 102342 mem_read_write 103414


      Zones are stopped

      ^Croot@btcresast001p [ueng/admin] #zoneadm list -cv
      ID NAME STATUS PATH BRAND IP
      0 global running / native shared
      - btcoradev01 installed /zones/btcoradev01 native excl
      root@btcresast001p [ueng/admin] #


      CPU is idle

      root@btcresast001p [] #vmstat 5
      kthr memory page disk faults cpu
      r b w swap free re mf pi po fr de sr m1 m1 m1 m1 in sy cs us sy id
      0 0 0 31413712 31577136 33 110 89 0 0 0 43 0 0 0 0 486 2120 1046 0 0 100
      0 0 0 31634088 31564696 0 4 0 0 0 0 0 0 0 0 0 385 187 168 0 0 100
      0 0 0 31633768 31564376 0 0 0 0 0 0 0 0 0 0 0 388 134 166 0 0 100
      0 0 0 31633768 31564376 0 0 0 0 0 0 0 0 0 0 0 382 141 163 0 0 100
      0 0 0 31633768 31564376 0 0 0 0 0 0 0 0 0 0 0 386 128 167 0 0 100
      0 0 0 31633768 31564376 0 0 0 0 0 0 0 0 0 0 0 386 150 167 0 0 100
      0 0 0 31633080 31563736 2 23 0 0 0 0 0 0 0 0 0 396 218 181 0 0 100
      0 0 0 31632912 31563576 0 0 0 0 0 0 0 0 0 0 0 392 185 174 0 0 100


      Compare to a T1 Chips which is really quiet and has less activity occurring

      T1 Chip

      13 dram2 bank_busy_stalls 212 mem_read_write 206
      13 dram3 bank_busy_stalls 129 mem_read_write 97826
      14 dram0 bank_busy_stalls 86 mem_read_write 97721
      14 dram1 bank_busy_stalls 127 mem_read_write 99
      14 dram2 bank_busy_stalls 55 mem_read_write 69
      14 dram3 bank_busy_stalls 57 mem_read_write 97706
      15 dram0 bank_busy_stalls 329 mem_read_write 97948
      15 dram1 bank_busy_stalls 290 mem_read_write 242
      15 dram2 bank_busy_stalls 319 mem_read_write 271
      15 dram3 bank_busy_stalls 283 mem_read_write 97877
      16 dram0 bank_busy_stalls 116 mem_read_write 97742
      16 dram1 bank_busy_stalls 60 mem_read_write 91
      16 dram2 bank_busy_stalls 95 mem_read_write 78
      16 dram3 bank_busy_stalls 83 mem_read_write 97703
      17 dram0 bank_busy_stalls 331 mem_read_write 98038
      17 dram1 bank_busy_stalls 274 mem_read_write 411
      17 dram2 bank_busy_stalls 121 mem_read_write 251
      17 dram3 bank_busy_stalls 298 mem_read_write 98003
      ^C#