From: Mieden, Rick van der (rick.vandermieden@orangemail.nl)
Date: Thu Jul 28 2005 - 09:06:59 EDT
Can anybody give me a clear explenation of how a minor fault on a cpu
occurs.
$ mpstat 5
CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt
idl
0 1209 0 313 259 140 251 45 31 24 0 423 64 18 0
18
1 1232 0 301 152 94 250 44 30 25 0 383 64 18 1
18
CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt
idl
0 3581 0 1675 304 180 228 53 29 24 0 12749 82 16 0
1
1 4406 0 1992 43 0 203 41 27 21 0 11114 83 17 0
1
CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt
idl
0 4724 0 1203 287 167 236 43 30 23 0 16897 80 20 0
0
1 5598 0 1277 40 0 221 40 24 25 0 16288 76 24 0
0
CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt
idl
0 3960 0 2024 340 208 290 66 34 24 0 16369 76 20 1
3
1 4373 0 1818 73 22 268 51 30 29 0 12650 79 18 0
2
CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt
idl
0 4452 0 2310 287 168 225 46 26 24 0 17367 77 23 0
0
1 5079 0 1105 60 19 233 43 29 28 0 12767 79 21 0
0
CPU minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt
idl
0 5014 0 1772 317 180 281 54 32 31 0 12713 76 20 0
4
1 4681 0 1833 66 16 272 49 35 33 0 15526 74 21 0
5
I have a lot of minor faults and a lot of cross calls. I can imagine
that the amount of cross calls is related to the amount of minor faults.
But I don't have a clue how the cpu triggers a minor fault.
Can a high amount of minor faults be a reason for the high cpu usr
usage? I can't find any process which is consuming a lot of cpu time.
Regards,
Rick
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