IBM Power Systems 775 Manual page 142

page_migration_reservation[6]. . 0x0000000000000000 [0]
page_migration_reservation[7]
Performance Counters
:::=================
Performance Counters: ISR
cycles blocked sending . . . . . 0x0000000000000000 [0]
flits sent
flits dropped. . . . . . . . . . 0x0000000000000000 [0]
link retries
Performance Counters: HFI
agg pkts sent. . . . . . . . . . 0x000000001bb3f9a8 [464779688]
agg pkts dropped sendng
agg pkts received. . . . . . . . 0x00000000076a4f4f [124407631]
agg pkts dropped rcving
agg imm send pkt count . . . . . 0x00000000001ba3f6 [1811446]
agg send recv pkt count
agg fullRDMA sent count. . . . . 0x00000000188e9613 [411997715]
agg halfRDMA sent count
agg smallRDMA sent count . . . . 0x0000000000000000 [0]
agg ip pkt sent count
agg cau pkt sent count . . . . . 0x0000000000000000 [0]
agg gups pkt sent count
addr xlat wait count . . . . . . 0x000000031589d5d5 [13246256597]
As shown in Table 2-2 on page 129, the last part of this output shows "Performance Counters:
HFI". By getting the difference in the numbers in this part between before and after your
parallel job is run, you check the amount of traffic that was on the specific HFI.
Often the traffic of IP protocol communication on each HFI is checked by an AIX command,
such as topas or nmon. However, US protocol communication cannot be checked by such AIX
commands. In this case, hfi_read_regs command is useful. For example, you confirm
whether both HFI0 and HFI1 are used as intended in parallel jobs that use US protocol
communication. Table 2-2 on page 129 shows some output of Performance Counters for HFIs
from hfi_read_regs command in running simple pingpong benchmarks that change the
number of MP_INSTANCES environment variable. You see that only HFI0 is used in
MP_INSTANCES=1 whereas HFI0 and HFI1 are used when MP_INSTANCES is set to more
than two. This behavior is reasonable.
128
IBM Power Systems 775 for AIX and Linux HPC Solution
PMRs5.offset(48:56) . . . . . 0x0 . . . . . . . [0]
PMRs5.reservatn(63:63)
PMRs6.offset(48:56)
PMRs6.reservatn(63:63). . . . 0x0 . . . . . . . False
PMRs7.offset(48:56) . . . . . 0x0 . . . . . . . [0]
PMRs7.reservatn(63:63)
0x0 False
0x0 [0]
0x0000000000000000 [0]
0x0 False
0x0000000000000000 [0]
0x0000000000000000 [0]
0x0000000000000000 [0]
0x00000000000000af [175]
0x0000000001c83b05 [29899525]
0x0000000000000036 [54]
0x0000000000dad28f [14340751]
0x0000000000000000 [0]