Date: Thu, 15 Apr 1999 14:12:20 -0700 (PWT) From: Matthew Jacob <mjacob@feral.com> To: freebsd-scsi@freebsd.org Subject: I/O distributed across multiple SCSi busses, same hba... Message-ID: <Pine.LNX.4.04.9904151409440.4563-100000@feral-gw>
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Here's a case of a two-channel Qlogic 1240 (two independent Ultra channels
on the same controller card)- I'm doing lmdd's reading from a drive on
either bus simultaneously. There's a very wierd distrbution of I/O from
bus to bus. Anyone have a quick notion as to why? It's not a controller
hw queue resource issue as this is raw access... it might be f/w but I'd
kinda doubt it. Is it a VM thingie perhaps? I wouldna think so....
tty da0 da1 cpu
tin tout KB/t tps MB/s KB/t tps MB/s us ni sy in id
1 26 0.00 0 0.00 0.00 0 0.00 4 0 13 6 77
0 12 8.00 3 9.87 8.00 1262 9.86 2 0 68 20 11
0 12 8.00 5 9.80 8.00 1249 9.76 1 0 71 17 12
0 12 8.00 1255 9.80 8.00 1243 9.71 2 0 67 19 13
0 12 8.00 6 9.89 8.00 1265 9.88 2 0 70 18 10
0 12 8.00 1267 9.90 8.00 1258 9.83 3 0 68 18 11
0 12 8.00 263 9.87 8.00 1253 9.79 2 0 70 19 10
0 12 8.00 1265 9.88 8.00 1230 9.61 3 0 68 16 13
0 12 8.00 64 9.87 8.00 1240 9.69 3 0 65 18 14
0 12 8.00 1259 9.83 8.00 1236 9.66 2 0 66 22 10
0 12 8.00 263 9.87 8.00 1240 9.68 3 0 68 17 11
0 12 8.00 3 9.87 8.00 1239 9.68 2 0 68 19 11
0 12 8.00 1261 9.85 8.00 1239 9.68 2 0 66 21 11
0 12 8.00 1262 9.86 8.00 1239 9.68 2 0 71 17 11
0 12 8.00 7 9.90 8.00 1226 9.58 2 0 67 17 13
0 12 8.00 1261 9.86 8.00 1239 9.68 2 0 71 16 12
0 12 8.00 1259 9.83 8.00 1239 9.68 3 0 69 16 12
0 12 8.00 1251 9.77 8.00 1239 9.68 4 0 66 18 13
0 12 8.00 252 9.78 8.00 1239 9.68 2 0 67 19 13
0 12 8.00 1252 9.78 8.00 1219 9.52 3 0 65 19 13
tty da0 da1 cpu
tin tout KB/t tps MB/s KB/t tps MB/s us ni sy in id
0 36 8.00 1252 9.78 8.00 1214 9.48 3 0 65 17 14
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