* Huge iowait on 2.6.4 - not on 2.4.20 !
@ 2004-04-16 12:48 alan pearson
0 siblings, 0 replies; 2+ messages in thread
From: alan pearson @ 2004-04-16 12:48 UTC (permalink / raw)
To: linux-kernel
Hi all,
First apologies for the very long mail, but I
trust it has all the info you require
to assist me !
I'm experiencing HUGE iowait times on kernel 2.6.4
that weren't there on 2.4.20.
I've got a dual Xeon 2.8Ghz CPU ML530, 2Gb RAM, with
a CCISS controller, with each drive being a RAID0
device.
So I've got 12 ULTRA320 disks available to the OS.
I've done some simple dd tests and include both the
vmstat and iostat for each test on 2.4 and 2.6 below.
dd if=/dev/zero of=/tmp/x bs=1M count=4906 ; sync
dd if=x of=/dev/null bs=1M count=4096 ; sync
On 2.6 the iowait jumps to around 70%, while 2.4 on
both tests it is firmly zero.
On disk read, I'm loosing 30 Mb/sec of bandwidth PER
DISK, compared to 2.4.20.
I've tried using both the deadline and as ioschedulers
but no difference.
Under real conditions (ie our application running
which reads from all the disks simultaneously) on
2.6.4, the system performance is around 1/3 of 2.4.20)
Summary MB/Sec :
dd if=x dd if=/dev/zero
2.4 64 35.6
2.6 30.34 35.9
Details are below.
Any help greatly appreciated !
Please cc me on any responses !
Thanks in advance,
AlanP
###############2.6.4###################
ovssoak4:/tmp # date ;time (dd if=/dev/zero of=/tmp/x
bs=1M count=4906 ; sync);date
Fri Apr 16 11:32:31 GMT 2004
4906+0 records in
4906+0 records out
Fri Apr 16 11:34:25 GMT 2004
35.9M/s
ovs5@ovssoak4:~/bench> vmstat 1
procs -----------memory---------- ---swap--
-----io---- --system-- ----cpu----
r b swpd free buff cache si so bi
bo in cs us sy id wa
0 4 10744 954068 24072 385968 0 0 146
510 371 643 1 7 76 16
1 1 10744 589588 24432 745260 0 0 0
51608 1346 1429 0 24 55 21
0 3 10744 322260 24692 1008840 0 0 0
64424 1436 1449 0 17 48 35
1 1 10744 263636 24748 1066584 0 0 0
58988 1402 1268 0 5 28 68
0 4 10744 141012 24868 1187504 0 0 0
61640 1382 1312 0 9 46 45
0 4 10744 128532 24880 1199732 0 0 0
62804 1416 1303 0 1 27 72
0 4 10744 116820 24892 1211280 0 0 0
58960 1373 1309 0 1 25 73
0 6 15696 7336 23776 1320460 0 0 0
52040 1364 1438 0 10 33 57
0 6 15696 7336 23784 1320588 0 0 0
50844 1348 1347 0 1 38 61
0 6 15696 7336 23796 1320644 0 0 0
54952 1349 1379 0 2 54 44
0 8 15696 6856 23684 1321096 0 0 0
52344 1388 1892 0 14 27 59
0 8 15696 7304 23692 1320680 0 0 0
54856 1359 1385 0 1 15 84
0 8 15696 7304 23704 1320532 0 0 0
50584 1353 1373 0 2 18 81
0 8 15696 7144 23604 1320632 0 0 0
57368 1403 1905 0 14 32 54
0 2 15696 5592 25004 1320796 0 0 0
46848 1437 1626 0 1 43 56
0 2 15696 5576 25004 1320796 0 0 0
50320 1435 1609 0 1 50 49
0 3 15696 5568 25004 1320796 0 0 0
44216 1432 1526 0 1 48 51
0 3 15696 5544 25016 1320784 0 0 0
44076 1462 1699 0 1 27 72
1 5 15696 3428 19320 1328588 0 0 0
56348 1384 1825 0 18 23 59
0 10 15696 5540 19424 1326444 0 0 348
48708 1351 1432 0 10 0 90
0 10 15696 5812 19432 1325960 0 0 0
50956 1352 1425 0 2 0 99
1 10 15696 3444 19456 1328248 0 0 0
51516 1338 1403 0 2 0 98
0 10 15696 5812 19592 1325800 0 0 0
48648 1340 1420 0 13 11 76
0 10 15696 5428 19604 1326060 0 0 0
54676 1366 1428 0 1 20 78
0 10 15696 5428 19612 1326188 0 0 0
49508 1352 1421 0 1 28 71
0 4 15696 5360 19744 1326124 0 0 0
47980 1333 1375 0 12 34 54
0 10 15696 5872 19752 1325504 0 0 0
46192 1333 1502 0 1 31 68
0 11 15696 3632 19760 1327740 0 0 0
45252 1327 1563 0 1 37 62
0 2 15696 4848 20436 1325772 0 0 0
41772 1377 1507 0 1 45 54
0 2 15696 4848 20436 1325772 0 0 0
40528 1409 1568 0 1 50 49
0 2 15696 4848 20436 1325772 0 0 0
44940 1414 1581 0 1 50 50
0 3 15696 4852 20436 1325772 0 0 0
33304 1463 1464 0 0 50 50
1 1 16076 5428 20652 1325040 0 0 0
39788 1389 2006 0 20 48 31
0 9 16076 5620 20788 1324700 0 0 0
47048 1342 1598 0 13 22 65
0 9 16076 5556 20792 1324764 0 0 0
48060 1343 1413 0 1 17 82
0 9 16076 5428 20804 1324956 0 0 0
42920 1329 1386 0 1 25 74
0 10 16076 5180 20812 1325084 0 0 0
48620 1337 1390 0 2 12 86
0 3 16600 3580 21004 1326476 0 0 0
38704 1365 1514 0 23 17 60
0 10 16600 5820 21012 1324292 0 0 8
40524 1326 1329 0 1 21 77
0 9 16600 5820 21016 1324220 0 0 0
44548 1340 1507 0 1 0 99
0 2 16600 5052 21700 1324352 0 0 0
37740 1396 1573 0 1 36 63
0 2 16600 5052 21700 1324352 0 0 0
46860 1420 1611 0 1 50 49
0 2 16600 5052 21700 1324352 0 0 0
43344 1420 1575 0 1 50 49
0 2 16600 5052 21700 1324352 0 0 0
43216 1444 1576 0 1 50 49
0 3 16600 5052 21716 1324336 0 0 0
29324 1453 1599 0 0 48 51
0 4 16600 5752 21852 1323588 0 0 0
48724 1377 1545 0 13 27 61
procs -----------memory---------- ---swap--
-----io---- --system-- ----cpu----
r b swpd free buff cache si so bi
bo in cs us sy id wa
0 4 17112 5316 22008 1323872 0 512 0
43408 1328 1414 0 15 19 66
0 7 17112 5572 22016 1324104 0 0 0
45860 1331 1350 0 1 17 81
0 7 17112 5588 22024 1324096 0 0 0
45624 1327 1326 0 2 6 93
0 7 17112 5844 22032 1323816 0 0 0
49656 1348 1361 0 1 4 94
0 4 17112 5676 22164 1323820 0 0 0
41312 1329 1527 0 12 22 66
0 12 17112 5676 22172 1323812 0 0 32
44576 1338 1467 0 1 15 83
2 11 17112 5420 22180 1324076 0 0 116
40808 1332 1550 0 1 11 88
0 3 17112 6060 22744 1322968 0 0 40
39492 1346 1591 0 1 9 90
1 1 17112 6060 22744 1322968 0 0 0
42784 1419 1533 0 1 35 64
0 2 17112 6060 22744 1322968 0 0 0
44068 1439 1593 0 1 50 49
0 2 17112 6060 22744 1322968 0 0 0
40372 1443 1610 0 1 50 49
1 2 17628 5548 22692 1323320 0 40 0
44108 1429 1791 0 17 41 42
2 2 17628 5292 22648 1323812 0 0 0
28488 1372 1557 0 9 47 44
0 8 17628 5548 20900 1325288 0 0 0
49240 1365 1529 0 10 43 46
0 10 17628 5300 20908 1325348 0 0 0
45888 1328 1411 0 1 25 74
0 10 17628 5620 20916 1325000 0 0 0
44780 1335 1356 0 1 22 77
0 10 17628 5812 20924 1324856 0 0 0
49504 1350 1412 0 1 20 79
0 3 18716 3892 18992 1328760 0 0 0
39752 1325 1455 0 13 26 60
0 9 18716 5236 19620 1326840 0 0 0
41684 1329 1330 0 1 36 63
0 2 18716 5120 19620 1326976 0 0 0
40264 1413 1588 0 1 55 44
0 2 18716 5120 19620 1326976 0 0 0
43660 1406 1611 0 1 50 50
0 2 18716 5120 19620 1326976 0 0 0
46404 1433 1623 0 1 50 50
0 2 18716 5120 19620 1326976 0 0 0
45800 1417 1601 0 1 50 49
0 5 18716 5120 19620 1326976 0 0 0
32988 1441 1544 0 0 43 56
1 1 18716 5440 19640 1326412 0 0 0
44288 1469 1953 0 2 33 64
0 4 18716 5584 17288 1328764 0 0 0
50152 1365 1543 0 23 27 50
0 9 18716 5464 17296 1328892 0 0 0
40940 1328 1333 0 1 25 74
0 3 19144 7640 16432 1327696 0 0 8
38724 1332 1448 0 13 32 55
0 9 19144 5848 16444 1329452 0 0 0
46264 1329 1347 0 1 25 74
0 9 19144 5912 16448 1329380 0 0 0
46144 1331 1372 0 1 26 73
1 9 19144 6168 16460 1328996 32 0 32
46352 1325 1362 0 2 36 62
0 7 19144 5256 18260 1328080 0 0 1280
43576 1407 2164 0 14 21 65
0 2 19144 5128 18260 1328148 0 0 0
33672 1404 1585 0 0 59 40
0 2 19144 5128 18260 1328148 0 0 0
45136 1430 1588 0 1 52 47
0 2 19144 5128 18260 1328148 0 0 0
45424 1454 1608 0 1 50 49
0 3 19144 5128 18260 1328148 0 0 0
40208 1431 1583 0 1 47 52
1 3 19144 5448 18284 1328124 0 0 352
38180 1487 1709 0 2 24 74
1 4 23040 3464 16376 1331780 0 0 4
46524 1360 1680 0 24 9 67
0 9 23040 5928 16400 1329240 0 0 8
40472 1333 1507 0 6 15 79
0 9 23040 5864 16412 1329296 0 0 4
48652 1342 1705 0 2 5 94
0 10 23040 5544 16428 1329484 0 0 352
49516 1346 1501 0 2 15 83
0 10 23040 5352 16440 1329744 0 0 4
44628 1333 1524 0 1 6 93
1 8 23040 5896 16472 1329372 0 0 4
43000 1336 1638 0 3 12 85
0 9 23040 5704 15732 1330248 0 0 4
44528 1329 1569 0 12 15 73
0 8 23040 5640 15740 1330240 0 0 0
41804 1318 1451 0 1 29 70
0 2 23040 5672 15752 1330160 0 0 4
43584 1320 1391 0 2 28 70
procs -----------memory---------- ---swap--
-----io---- --system-- ----cpu----
r b swpd free buff cache si so bi
bo in cs us sy id wa
1 3 23040 5672 15756 1330156 0 0 4
41064 1404 1537 0 1 50 50
0 4 23040 5672 15764 1330148 0 0 8
45996 1463 1842 0 1 7 92
0 4 23040 5032 16388 1330136 0 0 8
46300 1434 1932 0 1 0 99
0 3 23040 5032 16392 1330132 0 0 4
43492 1420 1788 0 0 22 78
0 3 23040 5040 16396 1330128 0 0 4
44880 1441 1765 0 1 25 74
0 3 23040 5040 16400 1330124 0 0 4
48392 1442 1792 0 1 25 74
0 3 23040 5040 16404 1330120 0 0 4
44468 1422 1763 0 1 25 75
0 3 23040 5040 16408 1330184 0 0 4
41536 1414 1762 0 0 25 74
0 7 23040 5040 16416 1330176 0 0 8
32616 1447 1823 0 0 12 88
0 4 23040 5040 16424 1330168 0 0 8
46176 1447 2126 0 1 6 93
0 3 23040 5040 16432 1330160 0 0 8
45040 1429 1770 0 1 24 76
0 3 23040 4976 16436 1330156 0 0 16
46884 1417 1639 0 1 40 60
0 2 23040 4976 16436 1330156 0 0 28
47044 1448 1545 0 0 50 49
0 2 23040 4976 16436 1330156 0 0 64
47400 1436 1452 0 1 50 49
0 2 23040 4976 16436 1330156 0 0 8
43032 1403 1460 0 1 50 50
0 2 23040 4976 16444 1330148 0 0 8
44544 1423 1566 0 1 50 49
0 0 23040 4852 16520 1330276 0 0 100
776 1145 1276 0 0 91 9
0 0 23040 4788 16564 1330300 0 0 0
80 1026 1206 0 0 99 1
ovs5@ovssoak4:~> iostat 2 5
Linux 2.6.4 (ovssoak4) 04/16/04
avg-cpu: %user %nice %sys %iowait %idle
0.64 0.00 1.19 6.25 91.92
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 61.52 564.57 8437.47
139696 2087768
cciss/c0d1 1.57 35.20 0.00
8711 0
cciss/c0d2 1.71 41.77 0.00
10335 0
cciss/c0d3 1.58 41.77 0.00
10335 0
cciss/c0d4 10.19 38.41 0.00
9503 0
cciss/c0d5 1.83 41.77 0.00
10335 0
cciss/c0d6 2.49 26.96 0.00
6671 0
cciss/c0d7 3.94 28.09 0.00
6951 0
cciss/c0d8 3.77 28.09 0.00
6951 0
cciss/c0d9 12.13 35.20 0.00
8711 0
cciss/c0d10 5.84 33.23 0.00
8223 0
cciss/c0d11 0.03 4.17 0.00
1032 0
avg-cpu: %user %nice %sys %iowait %idle
0.25 0.00 10.12 66.88 22.75
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 443.50 448.00 107016.00
896 214032
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
avg-cpu: %user %nice %sys %iowait %idle
0.12 0.00 9.86 69.79 20.22
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 436.00 0.00 104220.00
0 208440
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 1.62 62.12 36.25
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 415.42 0.00 102169.15
0 205360
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
avg-cpu: %user %nice %sys %iowait %idle
0.12 0.00 11.49 56.43 31.96
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 409.50 0.00 94320.00
0 188640
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
ovssoak4:/tmp # date; time (dd if=x of=/dev/null bs=1M
count=4096 ; sync); date
Fri Apr 16 11:36:43 GMT 2004
4096+0 records in
4096+0 records out
Fri Apr 16 11:37:58 GMT 2004
30.34Mb/s
ovs5@ovssoak4:~/bench> vmstat 1
procs -----------memory---------- ---swap--
-----io---- --system-- ----cpu----
r b swpd free buff cache si so bi
bo in cs us sy id wa
0 1 23040 5876 17392 1326752 0 0 143
731 367 628 1 7 76 16
0 1 23040 5868 17444 1327176 0 0 52676
0 1372 1713 0 5 74 21
0 1 23512 5868 17552 1327616 0 0 46580
124 1342 1615 0 5 71 24
1 0 23512 5868 17604 1327564 0 0 50228
0 1352 1610 0 5 74 21
0 1 23512 5796 17656 1327512 0 0 49068
0 1347 1635 0 5 74 21
0 1 23512 5864 17704 1327600 0 0 51384
0 1352 1649 0 5 74 21
0 1 23512 5864 17756 1327276 0 0 49916
0 1363 1667 0 4 74 21
0 1 23512 5864 17828 1327476 0 0 49512
24 1347 1598 0 5 73 21
1 0 23512 5864 17876 1327224 0 0 47860
24 1347 1640 0 5 74 22
0 1 23512 5864 17924 1327584 0 0 50540
0 1357 1679 0 4 74 21
0 1 23512 5864 17972 1326788 0 0 50636
0 1349 1635 0 5 74 21
0 1 23512 5864 18020 1327420 0 0 49816
0 1336 1596 0 5 75 21
0 1 23512 5416 18072 1326960 0 0 51484
0 1363 1661 0 5 74 21
0 1 23512 5864 18144 1326888 0 0 48624
44 1353 1653 0 4 73 22
0 1 23512 5864 18192 1327112 0 0 50568
0 1345 1711 0 4 74 21
0 1 23512 5864 18244 1326584 0 0 50732
0 1360 1643 0 5 74 21
0 1 23512 5864 18288 1327084 0 0 48020
0 1346 1660 0 5 72 24
0 1 23472 5864 18344 1326416 16 0 49600
0 1367 1695 0 5 71 24
0 1 23472 5864 18424 1327016 0 0 46772
68 1342 1606 0 4 73 23
0 1 23472 5864 18492 1326268 0 0 46668
0 1338 1666 0 5 70 26
0 1 23472 5864 18540 1327172 0 0 49928
0 1363 1619 0 5 74 21
0 1 23472 5864 18588 1326920 0 0 49200
0 1354 1675 0 5 74 21
0 1 23472 5864 18640 1326528 0 0 50796
0 1356 1644 0 5 75 21
0 1 23472 5864 18752 1326756 0 0 46580
148 1346 1703 0 5 71 24
0 1 23472 5864 18800 1326844 0 0 49200
0 1348 1625 0 5 75 21
0 1 23472 5864 18852 1326724 0 0 47428
0 1354 1618 0 4 74 21
0 1 23472 5864 18900 1326812 0 0 50352
0 1352 1671 0 5 75 21
0 1 23472 5864 18948 1326628 0 0 50224
0 1334 1524 0 5 74 21
0 1 23472 5864 19032 1326612 0 0 49200
68 1339 1592 0 5 71 24
0 1 23472 5864 19084 1326560 0 0 51252
0 1344 1546 0 5 74 21
0 1 23472 5856 19136 1326440 0 0 51252
0 1352 1619 0 5 74 21
0 1 23472 5856 19188 1326456 0 0 50228
0 1353 1673 0 5 74 21
0 1 23472 5856 19240 1326404 0 0 50228
0 1340 1566 0 5 74 21
0 1 23472 5856 19312 1326264 0 0 50224
44 1357 1623 0 5 74 22
1 1 23472 5920 19364 1326280 0 0 52276
0 1372 1699 0 5 75 21
0 1 23472 5792 19412 1326368 0 0 48260
0 1360 1552 0 4 74 21
0 1 23472 5856 19464 1326112 0 0 52276
0 1358 1663 0 5 74 21
0 1 23472 5856 19516 1325992 0 0 51092
0 1365 1669 0 5 74 21
0 1 23472 5856 19592 1325984 0 0 48332
60 1356 1613 0 5 70 25
0 1 23472 5856 19644 1325592 0 0 52968
0 1343 1649 0 5 74 21
0 1 23472 5856 19696 1325880 0 0 54660
0 1369 1680 0 5 74 21
0 1 23472 5856 19744 1325764 0 0 50224
0 1344 1660 0 5 74 21
1 0 23472 5856 19796 1325712 0 0 51252
0 1350 1654 0 5 74 21
0 1 23472 5856 19872 1325772 0 0 52276
44 1355 1593 0 5 74 21
0 1 23472 5792 19924 1325448 0 0 50916
0 1341 1542 0 5 74 21
0 1 23472 5856 19972 1325536 0 0 52608
0 1345 1600 0 5 74 21
procs -----------memory---------- ---swap--
-----io---- --system-- ----cpu----
r b swpd free buff cache si so bi
bo in cs us sy id wa
1 1 23472 5856 20024 1325552 0 0 52276
0 1372 1644 0 5 74 21
0 1 23472 5856 20076 1325432 0 0 51356
0 1333 1570 0 5 74 21
0 1 23472 5856 20172 1325336 0 0 45100
104 1334 1538 0 4 73 23
0 1 23472 5856 20228 1325008 0 0 54040
0 1355 1632 0 5 74 20
0 1 23472 5856 20276 1324416 0 0 52676
0 1358 1619 0 5 74 21
1 0 23472 5856 20328 1325248 0 0 53188
0 1359 1686 0 5 74 21
0 1 23472 5856 20380 1324992 0 0 52164
0 1358 1601 0 5 74 21
0 2 23472 5856 20456 1325120 0 0 49312
52 1332 1565 0 5 73 22
2 0 23472 5464 20504 1324732 0 0 51620
0 1335 1574 0 5 74 21
0 1 23472 5856 20556 1324884 0 0 51904
0 1346 1544 0 5 74 21
0 1 23472 5856 20608 1324832 0 0 52276
0 1331 1591 0 4 75 21
1 0 23472 5856 20660 1324848 0 0 50228
0 1344 1580 0 5 74 21
0 1 23472 5856 20712 1324728 0 0 54324
0 1347 1581 0 5 74 20
0 1 23472 5856 20776 1324936 0 0 48156
44 1347 1572 0 5 74 21
0 1 23472 5600 20776 1325140 0 0 52024
0 1419 1868 0 6 74 20
1 0 23472 5856 20776 1324800 0 0 47148
0 1355 1768 0 6 74 19
0 1 23472 5920 20732 1324844 0 0 44268
0 1322 1638 0 8 74 18
0 1 23472 5856 20728 1324780 0 0 57852
0 1498 1950 0 5 74 20
1 1 23472 5856 20620 1324888 0 0 54172
44 1375 1734 0 6 74 21
0 1 23472 5856 20128 1325244 0 0 39116
0 1298 1563 0 6 74 20
2 0 23472 5088 20128 1325040 0 0 56180
0 1384 1713 0 6 74 20
0 1 23472 5856 20128 1325244 0 0 62340
0 1393 1752 0 6 74 20
1 0 23472 5856 20128 1325244 0 0 41948
0 1298 1627 0 8 75 18
1 0 23472 5856 20112 1325260 0 0 38888
44 1381 1747 0 6 74 20
0 1 23472 5856 19928 1325444 0 0 44628
0 1390 1752 0 6 74 20
0 1 23472 5728 19812 1325764 0 0 53756
0 1363 1739 0 6 74 19
1 1 23472 5856 19556 1325884 0 0 61976
0 1390 1809 0 6 74 20
1 0 23472 5920 19060 1326244 0 0 18680
0 1219 1424 0 6 74 19
0 0 23472 6304 18916 1326932 0 0 29284
116 1335 1682 0 3 83 14
0 0 23472 6304 18916 1326932 0 0 0
0 1015 1166 0 0 100 0
0 0 23472 6056 18916 1327204 0 0 356
0 1028 1184 0 0 99 1
0 0 23472 6056 18916 1327204 0 0 0
0 1014 1102 0 0 100 0
0 0 23472 6064 18916 1327204 0 0 0
0 1014 1111 0 0 100 0
0 0 23472 6064 18976 1327212 0 0 0
116 1040 1140 0 0 98 2
0 0 23472 6120 18976 1327212 0 0 0
0 1017 1126 0 0 100 0
0 0 23472 6120 18976 1327212 0 0 0
0 1015 1133 0 0 100 0
0 0 23472 6144 18976 1327212 0 0 0
0 1025 1142 0 0 100 0
0 0 23472 6144 18976 1327212 0 0 0
0 1014 1107 0 0 100 0
0 0 23472 6192 19016 1327172 0 0 0
76 1026 1151 0 0 99 1
0 0 23472 6192 19016 1327172 0 0 0
0 1017 1119 0 0 100 0
0 0 23472 6216 19016 1327172 0 0 0
0 1017 1159 0 0 100 0
ovs5@ovssoak4:~> iostat 2 5
Linux 2.6.4 (ovssoak4) 04/16/04
avg-cpu: %user %nice %sys %iowait %idle
0.42 0.00 1.91 19.15 78.52
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 153.73 5175.80 25444.82
2054584 10100576
cciss/c0d1 0.98 21.94 0.00
8711 0
cciss/c0d2 1.06 26.04 0.00
10335 0
cciss/c0d3 0.98 26.04 0.00
10335 0
cciss/c0d4 6.35 23.94 0.00
9503 0
cciss/c0d5 1.14 26.04 0.00
10335 0
cciss/c0d6 1.55 16.81 0.00
6671 0
cciss/c0d7 2.45 17.51 0.00
6951 0
cciss/c0d8 2.35 17.51 0.00
6951 0
cciss/c0d9 7.56 21.94 0.00
8711 0
cciss/c0d10 3.64 20.71 0.00
8223 0
cciss/c0d11 0.02 2.60 0.00
1032 0
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 4.62 21.00 74.38
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 464.00 102244.00 0.00
204488 0
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 5.00 20.75 74.25
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 483.50 105352.00 0.00
210704 0
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 4.62 21.85 73.53
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 451.50 98760.00 92.00
197520 184
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 5.75 19.88 74.38
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 557.50 125780.00 0.00
251560 0
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
xxxxxxxxxxxxxx2.4.20xxxxxxxxxxxxxxxxxxxxx
ovssoak4:/tmp # date ;time (dd if=/dev/zero of=/tmp/x
bs=1M count=4906 ; sync);date
Fri Apr 16 11:43:52 GMT 2004
4906+0 records in
4906+0 records out
Fri Apr 16 11:45:47 GMT 2004
35.6 Mb/s
ovs5@ovssoak4:~> vmstat 1
procs -----------memory---------- ---swap--
-----io---- --system-- ----cpu----
r b swpd free buff cache si so bi
bo in cs us sy id wa
1 0 0 2010764 10920 13432 0 0 56
12 33 24 1 4 96 0
0 0 0 2010764 10920 13432 0 0 0
0 105 7 0 0 100 0
0 0 0 2010764 10920 13432 0 0 0
0 103 8 0 0 100 0
0 1 0 2010636 11016 13432 0 0 96
0 131 71 0 2 98 0
0 1 0 2010048 11584 13432 0 0 568
0 246 288 0 11 89 0
0 1 0 2009448 12164 13432 0 0 580
0 248 298 0 11 89 0
0 1 0 2008836 12740 13432 0 0 576
0 247 292 0 14 86 0
0 1 0 2008212 13328 13432 0 0 588
0 250 302 0 11 89 0
0 1 0 2007612 13892 13432 0 0 564
0 244 294 0 10 90 0
0 1 0 2006808 14652 13432 0 0 564
196 246 296 0 10 90 0
0 2 0 2005492 15924 13432 0 0 1076
196 379 564 0 19 81 0
1 0 0 1862724 16508 151180 0 0 396
48 206 213 0 25 75 0
1 0 0 1655724 16704 351308 0 0 0
0 103 8 0 25 75 0
1 1 0 1451492 16900 548756 0 0 0
37996 337 122 0 25 75 0
0 2 0 1386492 16964 611596 0 0 0
56064 455 266 0 9 91 0
1 1 0 1339792 17008 656744 0 0 0
46332 429 234 0 7 93 0
0 2 0 1289744 17056 705132 0 0 0
48844 440 247 0 9 91 0
0 2 0 1233908 17112 759108 0 0 0
55216 449 275 0 6 94 0
0 2 0 1182524 17160 808788 0 0 0
50560 437 253 0 6 94 0
0 2 0 1129376 17212 860244 0 0 0
52476 428 252 0 6 94 0
0 2 0 1080700 17260 907300 0 0 0
47992 442 244 0 6 94 0
0 2 0 1021384 17316 964648 0 0 0
58496 452 284 0 9 91 0
0 2 0 975564 17360 1008944 0 0 0
45188 423 234 0 5 94 0
0 2 0 923516 17408 1059268 0 0 0
51332 439 254 0 8 92 0
0 2 0 867700 17464 1113224 0 0 0
55036 445 266 0 8 92 0
0 2 0 820360 17508 1158996 0 0 0
46596 430 241 0 6 94 0
0 2 0 773340 17552 1204452 0 0 0
46344 418 243 0 8 92 0
0 2 0 721288 17604 1254776 0 0 0
51440 445 248 0 8 92 0
0 2 0 668852 17652 1305472 0 0 0
51720 447 252 0 10 90 0
0 2 0 619784 17700 1352908 0 0 0
48248 434 252 0 7 93 0
1 1 0 565140 17752 1405736 0 0 0
54020 441 260 0 7 93 0
0 2 0 514128 17804 1455052 0 0 0
50184 434 252 0 6 94 0
1 1 0 456104 17860 1511148 0 0 0
57336 441 288 0 7 93 0
1 1 0 404392 17908 1561144 0 0 0
51332 417 253 0 6 94 0
0 2 0 355772 17956 1608148 0 0 0
47492 429 243 0 7 93 0
0 2 0 296972 18012 1664996 0 0 0
58100 458 296 0 6 93 0
0 2 0 242456 18064 1717700 0 0 0
53760 445 272 0 7 93 0
0 2 0 189892 18112 1768520 0 0 0
51836 444 256 0 8 92 0
0 2 0 135632 18164 1820980 0 0 0
53520 448 263 0 7 93 0
0 2 0 85404 18212 1869540 0 0 0
49524 437 265 0 6 94 0
0 3 0 47876 16132 1907564 0 0 0
50104 452 288 0 7 93 0
1 3 0 47528 16172 1907444 0 0 0
43576 423 400 0 9 91 0
0 3 0 48492 16220 1906428 0 0 0
44960 426 422 0 10 90 0
0 3 0 47964 16260 1906924 0 0 0
44168 412 400 0 10 90 0
0 3 0 47868 16304 1906984 0 0 0
42768 426 404 0 7 93 0
0 3 0 48488 16352 1906328 0 0 0
42948 415 406 0 7 93 0
procs -----------memory---------- ---swap--
-----io---- --system-- ----cpu----
r b swpd free buff cache si so bi
bo in cs us sy id wa
0 3 0 47496 16392 1907268 0 0 0
43528 427 404 0 8 92 0
0 3 0 47656 16436 1907060 0 0 0
41092 422 386 0 11 89 0
0 3 0 47816 16476 1906856 0 0 0
42516 411 396 0 8 92 0
0 3 0 47528 16516 1907108 0 0 0
41672 419 386 0 7 93 0
0 3 0 47956 16560 1906636 0 0 0
44408 422 430 0 12 88 0
3 0 0 47696 16604 1906844 0 0 0
42816 423 395 0 10 90 0
2 1 0 47352 16660 1907140 0 0 0
58940 463 389 0 17 83 0
0 3 0 47524 16692 1905860 0 0 0
37032 482 282 0 6 94 0
0 2 0 47588 16736 1904204 0 0 0
41860 431 302 0 9 91 0
0 2 0 47308 16784 1903256 0 0 0
50812 443 328 0 7 92 0
0 2 0 47204 16840 1903252 0 0 0
55288 485 368 0 10 90 0
0 2 0 47208 16892 1903244 0 0 0
51848 456 343 1 8 91 0
0 4 0 47456 16940 1902700 0 0 8
51344 455 403 0 8 92 0
0 3 0 47984 16996 1902116 0 0 4
52344 435 375 0 9 91 0
0 2 0 47836 17048 1903488 0 0 0
49664 433 432 1 10 89 0
0 3 0 47852 17092 1902664 0 0 4
45188 476 350 0 9 91 0
0 3 0 47680 17140 1902788 0 0 72
49920 451 365 0 9 91 0
0 2 0 47464 17192 1902880 0 0 0
50428 443 395 0 8 92 0
1 1 0 46996 17244 1903268 0 0 0
53888 463 367 0 9 91 0
0 2 0 49532 17300 1899444 0 0 0
56580 461 387 0 9 91 0
1 1 0 49180 17348 1898060 0 0 0
52088 466 363 0 9 91 0
0 2 0 48712 17400 1897124 0 0 0
52356 477 344 0 9 91 0
0 2 0 48524 17448 1895888 0 0 0
49016 470 336 0 9 91 0
0 2 0 49588 17488 1894844 0 0 0
42748 443 328 0 7 93 0
0 2 0 49456 17536 1893244 0 0 0
47760 448 346 0 7 93 0
0 4 0 49576 19300 1891400 0 0 28
48016 487 350 0 4 96 0
0 4 0 49576 19300 1891400 0 0 0
44640 430 258 0 1 98 0
0 4 0 49576 19300 1891400 0 0 0
42208 413 246 0 2 98 0
1 4 0 49576 19300 1891400 0 0 0
44640 426 252 0 2 98 0
0 5 0 49576 19300 1891400 0 0 0
46128 432 252 0 2 98 0
0 5 0 49576 19300 1891400 0 0 0
42900 410 234 0 2 98 0
0 5 0 49576 19300 1891400 0 0 0
46624 427 250 0 2 98 0
0 4 0 49576 19300 1891400 0 0 0
45316 419 218 0 1 99 0
0 4 0 49576 19300 1891400 0 0 0
48732 437 158 0 1 99 0
0 4 0 49576 19300 1891400 0 0 0
46004 426 140 0 0 100 0
0 4 0 49576 19300 1891400 0 0 0
46252 414 144 0 1 99 0
1 0 0 49712 19420 1892808 0 0 48
5016 248 347 1 19 81 0
1 0 0 49360 19612 1892972 0 0 0
0 107 352 0 28 72 0
1 1 0 49840 17788 1893496 0 0 0
36156 342 494 0 29 70 0
0 3 0 49988 17856 1893468 0 0 4
54824 461 411 0 11 89 0
0 2 0 50160 17908 1894020 0 0 16
53244 463 374 0 10 90 0
1 1 0 49684 17960 1894680 0 0 0
55808 470 368 0 9 91 0
0 2 0 50104 18004 1894440 0 0 0
43392 421 296 0 8 92 0
1 1 0 50144 18052 1894588 0 0 0
49792 439 329 0 8 92 0
1 1 0 49876 18108 1895020 0 0 0
51208 440 336 0 9 91 0
0 2 0 49580 18152 1895516 0 0 0
46976 434 309 0 8 92 0
procs -----------memory---------- ---swap--
-----io---- --system-- ----cpu----
r b swpd free buff cache si so bi
bo in cs us sy id wa
0 2 0 49492 18204 1895780 0 0 0
53244 450 360 0 10 90 0
0 2 0 49888 18256 1895568 0 0 0
49144 443 324 0 7 93 0
0 2 0 49920 18312 1895704 0 0 0
56436 461 372 0 10 90 0
0 2 0 50340 18368 1895460 0 0 0
56084 479 364 0 10 90 0
1 1 0 49948 18420 1896036 0 0 0
55044 468 373 0 9 91 0
0 2 0 49916 18472 1896248 0 0 0
51580 443 348 0 8 92 0
1 1 0 49740 18520 1896604 0 0 0
50684 437 331 0 10 90 0
0 2 0 49988 18572 1896516 0 0 0
50692 449 349 0 8 92 0
0 2 0 49676 18620 1896772 0 0 0
50436 463 345 0 7 93 0
1 1 0 50096 18672 1896296 0 0 0
49532 444 323 0 9 91 0
0 2 0 50056 18716 1896292 0 0 0
46964 451 323 0 8 92 0
0 2 0 50012 18760 1896292 0 0 0
44812 509 300 0 7 93 0
0 2 0 49824 18820 1896416 0 0 0
53124 465 366 0 9 91 0
1 1 0 49976 18876 1896068 0 0 0
59136 478 387 0 10 90 0
1 1 0 50328 18924 1895676 0 0 0
48000 439 332 0 7 93 0
0 2 0 49816 18956 1896188 0 0 8
56724 464 305 0 5 95 0
0 2 0 49784 18956 1896188 0 0 0
52556 456 290 0 1 99 0
0 2 0 49784 18956 1896188 0 0 0
44944 441 209 0 1 99 0
0 2 0 49792 18956 1896188 0 0 0
42240 438 198 0 1 99 0
0 2 0 49792 18956 1896188 0 0 0
39808 416 183 0 0 100 0
0 2 0 49812 18956 1896188 0 0 0
53012 452 308 0 0 100 0
1 1 0 49812 18956 1896188 0 0 0
56544 477 322 0 1 99 0
0 1 0 49828 18956 1896188 0 0 0
47648 432 164 0 0 100 0
1 0 0 49836 18956 1896188 0 0 0
49840 425 154 0 1 99 0
0 1 0 49852 18956 1896188 0 0 0
54336 447 174 0 0 100 0
0 0 0 50492 20824 1893772 0 0 0
12596 219 84 0 7 93 0
0 0 0 50492 20824 1893772 0 0 0
0 103 8 0 0 100 0
0 0 0 50492 20824 1893772 0 0 0
0 103 4 0 0 100 0
0 0 0 50492 20824 1893772 0 0 0
0 104 6 0 0 100 0
ovs5@ovssoak4:~> iostat 2 5
Linux 2.4.20-64GB-SMP (ovssoak4) 04/16/04
avg-cpu: %user %nice %sys %iowait %idle
0.04 0.00 1.06 0.00 98.91
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 46.48 3754.00 5865.27
8439856 13186480
cciss/c0d0p3 0.00 0.00 0.00
8 0
cciss/c0d0p4 46.48 3753.98 5865.27
8439808 13186480
cciss/c0d1 0.00 0.01 0.00
32 0
cciss/c0d2 0.00 0.01 0.00
32 0
cciss/c0d3 0.00 0.01 0.00
32 0
cciss/c0d4 0.00 0.01 0.00
32 0
cciss/c0d5 0.00 0.01 0.00
32 0
cciss/c0d6 0.00 0.01 0.00
32 0
cciss/c0d7 0.00 0.01 0.00
32 0
cciss/c0d8 0.00 0.01 0.00
32 0
cciss/c0d9 0.00 0.01 0.00
32 0
cciss/c0d10 0.00 0.01 0.00
32 0
cciss/c0d11 0.00 0.01 0.00
32 0
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 6.75 0.00 93.25
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 382.50 0.00 83872.00
0 167744
cciss/c0d0p3 0.00 0.00 0.00
0 0
cciss/c0d0p4 382.50 0.00 83872.00
0 167744
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 8.25 0.00 91.75
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 382.00 0.00 85344.00
0 170688
cciss/c0d0p3 0.00 0.00 0.00
0 0
cciss/c0d0p4 382.00 0.00 85344.00
0 170688
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 7.62 0.00 92.38
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 406.50 0.00 90624.00
0 181248
cciss/c0d0p3 0.00 0.00 0.00
0 0
cciss/c0d0p4 406.50 0.00 90624.00
0 181248
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
avg-cpu: %user %nice %sys %iowait %idle
0.12 0.00 6.50 0.00 93.38
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 379.00 0.00 84592.00
0 169184
cciss/c0d0p3 0.00 0.00 0.00
0 0
cciss/c0d0p4 379.00 0.00 84592.00
0 169184
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
ovssoak4:/tmp # date; time (dd if=x of=/dev/null bs=1M
count=4096 ; sync); date
Fri Apr 16 11:47:53 GMT 2004
4096+0 records in
4096+0 records out
Fri Apr 16 11:48:57 GMT 2004
64Mb/s
ovs5@ovssoak4:~> vmstat 1
procs -----------memory---------- ---swap--
-----io---- --system-- ----cpu----
r b swpd free buff cache si so bi
bo in cs us sy id wa
1 0 0 51300 20892 1893772 0 0 19
3763 55 33 0 4 96 0
0 0 0 51300 20892 1893772 0 0 0
0 105 7 0 0 100 0
0 1 0 49884 20892 1893852 0 0 41984
0 366 555 0 4 96 0
0 1 0 49824 20892 1893908 0 0 64512
0 501 837 0 10 90 0
0 1 0 50180 20892 1893556 0 0 66560
0 513 854 0 7 93 0
0 1 0 49876 19160 1895592 0 0 67072
0 512 862 0 8 92 0
0 1 0 50160 19160 1895304 0 0 66048
0 507 874 0 9 91 0
0 1 0 50116 19160 1895344 0 0 66560
0 512 876 0 7 93 0
0 1 0 49096 19160 1896360 0 0 66964
0 505 837 0 8 92 0
0 1 0 48960 19160 1896488 0 0 66644
0 505 858 0 6 94 0
0 1 0 49008 19160 1896432 0 0 64536
0 493 819 0 6 94 0
0 1 0 48480 19160 1896948 0 0 66560
0 508 868 0 10 90 0
0 1 0 50408 19160 1895032 0 0 65536
0 504 854 0 9 91 0
0 1 0 49392 19160 1896056 0 0 67072
0 515 854 0 9 91 0
0 1 0 50432 19160 1895032 0 0 66560
0 509 850 0 7 93 0
0 1 0 49928 19160 1895544 0 0 66560
0 511 852 0 8 92 0
0 1 0 49944 19160 1895548 0 0 66048
0 502 832 0 6 94 0
1 0 0 49328 19160 1896204 0 0 66560
0 516 853 0 6 94 0
0 1 0 49912 19160 1895748 0 0 67072
0 519 873 0 8 92 0
0 1 0 49904 19160 1895772 0 0 64524
0 526 880 0 10 90 0
1 0 0 50360 19160 1894444 0 0 66560
0 523 902 0 8 92 0
1 0 0 49836 19160 1895548 0 0 66048
0 531 924 0 8 92 0
0 1 0 49832 19160 1896632 0 0 67072
0 566 973 0 9 91 0
1 0 0 49952 19160 1894904 0 0 66048
0 546 957 0 6 93 0
0 1 0 49440 19160 1895816 0 0 67072
0 548 924 0 8 91 0
1 0 0 49856 19160 1895700 0 0 65536
0 547 921 0 7 93 0
0 1 0 50452 19160 1895576 0 0 67072
0 526 864 0 9 91 0
0 1 0 49836 19160 1896988 0 0 66560
0 539 907 0 8 91 0
0 1 0 49748 19160 1899508 0 0 66560
0 521 899 0 7 93 0
0 1 0 50340 19160 1899628 0 0 66560
0 534 939 0 6 94 0
0 1 0 49832 17224 1901496 0 0 66560
0 548 942 0 9 91 0
1 1 0 49332 17292 1901196 0 0 64612
72 516 887 0 8 92 0
0 1 0 49856 17292 1900776 0 0 66972
0 509 866 0 8 92 0
0 1 0 49304 17292 1901548 0 0 66560
0 508 852 0 9 91 0
0 1 0 49908 17292 1901188 0 0 65536
0 526 854 0 8 91 0
0 1 0 49780 17292 1901484 0 0 67072
0 525 872 0 8 92 0
0 1 0 49324 17292 1901996 0 0 65024
0 520 868 0 7 92 0
0 1 0 49836 17292 1901484 0 0 67072
0 513 848 0 9 91 0
0 1 0 50320 17292 1900996 0 0 65536
0 511 848 0 7 93 0
0 1 0 50176 17292 1901000 0 0 67072
0 553 902 0 8 92 0
0 1 0 50352 17292 1900248 0 0 64000
0 501 854 0 8 92 0
0 1 0 50288 17292 1898920 0 0 67072
0 509 888 0 8 92 0
0 1 0 50464 17292 1898484 0 0 66560
0 511 858 0 11 89 0
0 1 0 49960 17292 1898996 0 0 66560
0 511 853 0 8 92 0
2 1 0 49360 17292 1899608 0 0 66624
0 512 851 0 7 93 0
0 1 0 49856 17292 1899124 0 0 67008
0 503 837 0 6 94 0
procs -----------memory---------- ---swap--
-----io---- --system-- ----cpu----
r b swpd free buff cache si so bi
bo in cs us sy id wa
0 1 0 49988 17292 1899012 0 0 65992
0 504 843 0 7 93 0
0 1 0 49376 17292 1899636 0 0 66616
0 509 840 0 7 93 0
1 1 0 49328 17292 1899696 0 0 66172
0 511 849 0 9 91 0
1 0 0 49912 17292 1899124 0 0 66948
0 517 874 0 7 93 0
0 1 0 49928 17292 1899140 0 0 66048
0 507 834 0 6 94 0
0 1 0 49424 17292 1899660 0 0 66560
0 509 849 0 8 92 0
0 1 0 49440 17292 1899660 0 0 66048
0 505 853 0 8 92 0
0 1 0 49960 17292 1899156 0 0 67072
0 516 852 0 8 92 0
0 1 0 49464 17292 1899668 0 0 66560
0 508 851 0 9 91 0
0 1 0 49856 17292 1899284 0 0 67072
0 514 863 0 8 92 0
1 0 0 49872 17292 1899288 0 0 66048
0 505 834 0 6 94 0
0 1 0 49368 17292 1899800 0 0 65024
0 495 814 0 8 92 0
0 1 0 49900 17292 1899068 0 0 66560
0 494 836 0 9 91 0
0 1 0 49380 17292 1899588 0 0 66560
0 505 852 0 9 91 0
1 0 0 49388 17224 1895740 0 0 66560
0 509 874 0 7 93 0
1 0 0 49260 17224 1895872 0 0 66560
0 511 864 0 7 93 0
0 1 0 50300 17224 1894848 0 0 66048
0 505 838 0 6 94 0
0 1 0 49236 17264 1895884 0 0 64000
40 491 828 0 7 93 0
0 1 0 50148 17264 1894988 0 0 66560
0 513 866 0 7 93 0
0 0 0 50300 17296 1896020 0 0 43528
32 381 592 0 4 95 0
0 0 0 50300 17296 1896020 0 0 0
0 103 16 0 0 100 0
0 0 0 50300 17296 1896020 0 0 0
0 103 6 0 0 100 0
0 0 0 50300 17296 1896020 0 0 0
0 103 10 0 0 100 0
0 0 0 50300 17296 1896020 0 0 0
0 103 8 0 0 100 0
0 0 0 50300 17296 1896020 0 0 0
0 103 6 0 0 100 0
0 0 0 50300 17296 1896020 0 0 0
0 103 4 0 0 100 0
0 0 0 50300 17296 1896020 0 0 0
0 103 8 0 0 100 0
0 0 0 50300 17296 1896020 0 0 0
0 103 6 0 0 100 0
0 0 0 50300 17296 1896020 0 0 0
0 103 8 0 0 100 0
0 0 0 50300 17296 1896020 0 0 0
0 103 4 0 0 100 0
0 0 0 50300 17296 1896020 0 0 0
0 103 8 0 0 100 0
0 0 0 50300 17296 1896020 0 0 0
0 103 4 0 0 100 0
0 0 0 50300 17296 1896020 0 0 0
0 112 26 0 0 100 0
0 0 0 50084 17296 1896092 0 0 72
0 115 70 0 0 100 0
0 0 0 50128 17296 1896092 0 0 0
0 115 20 0 0 100 0
0 0 0 50136 17296 1896092 0 0 0
0 103 6 0 0 100 0
0 0 0 50296 17296 1896092 0 0 0
0 108 26 0 0 100 0
0 0 0 50296 17296 1896092 0 0 0
0 103 6 0 0 100 0
0 0 0 50296 17296 1896092 0 0 0
0 103 8 0 0 100 0
0 0 0 50296 17296 1896092 0 0 0
0 103 4 0 0 100 0
0 0 0 50296 17296 1896092 0 0 0
0 103 8 0 0 100 0
0 0 0 50296 17296 1896092 0 0 0
0 103 6 0 1 99 0
ovs5@ovssoak4:~> iostat 2 5
Linux 2.4.20-64GB-SMP (ovssoak4) 04/16/04
avg-cpu: %user %nice %sys %iowait %idle
0.04 0.00 1.28 0.00 98.69
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 60.32 4074.70 8626.21
9518144 20150048
cciss/c0d0p3 0.00 0.00 0.00
8 0
cciss/c0d0p4 60.32 4074.68 8626.21
9518096 20150048
cciss/c0d1 0.00 0.01 0.00
32 0
cciss/c0d2 0.00 0.01 0.00
32 0
cciss/c0d3 0.00 0.01 0.00
32 0
cciss/c0d4 0.00 0.01 0.00
32 0
cciss/c0d5 0.00 0.01 0.00
32 0
cciss/c0d6 0.00 0.01 0.00
32 0
cciss/c0d7 0.00 0.01 0.00
32 0
cciss/c0d8 0.00 0.01 0.00
32 0
cciss/c0d9 0.00 0.01 0.00
32 0
cciss/c0d10 0.00 0.01 0.00
32 0
cciss/c0d11 0.00 0.01 0.00
32 0
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 7.88 0.00 92.12
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 654.00 131584.00 0.00
263168 0
cciss/c0d0p3 0.00 0.00 0.00
0 0
cciss/c0d0p4 654.00 131584.00 0.00
263168 0
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 7.25 0.00 92.75
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 642.00 131072.00 0.00
262144 0
cciss/c0d0p3 0.00 0.00 0.00
0 0
cciss/c0d0p4 642.00 131072.00 0.00
262144 0
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 6.38 0.00 93.62
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 632.50 129536.00 0.00
259072 0
cciss/c0d0p3 0.00 0.00 0.00
0 0
cciss/c0d0p4 632.50 129536.00 0.00
259072 0
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
avg-cpu: %user %nice %sys %iowait %idle
0.00 0.00 7.38 0.00 92.62
Device: tps Blk_read/s Blk_wrtn/s
Blk_read Blk_wrtn
cciss/c0d0 644.00 132096.00 0.00
264192 0
cciss/c0d0p3 0.00 0.00 0.00
0 0
cciss/c0d0p4 644.00 132096.00 0.00
264192 0
cciss/c0d1 0.00 0.00 0.00
0 0
cciss/c0d2 0.00 0.00 0.00
0 0
cciss/c0d3 0.00 0.00 0.00
0 0
cciss/c0d4 0.00 0.00 0.00
0 0
cciss/c0d5 0.00 0.00 0.00
0 0
cciss/c0d6 0.00 0.00 0.00
0 0
cciss/c0d7 0.00 0.00 0.00
0 0
cciss/c0d8 0.00 0.00 0.00
0 0
cciss/c0d9 0.00 0.00 0.00
0 0
cciss/c0d10 0.00 0.00 0.00
0 0
cciss/c0d11 0.00 0.00 0.00
0 0
ovs5@ovssoak4:~>
____________________________________________________________
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^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Huge iowait on 2.6.4 - not on 2.4.20 !
@ 2004-04-16 15:12 Albert Cahalan
0 siblings, 0 replies; 2+ messages in thread
From: Albert Cahalan @ 2004-04-16 15:12 UTC (permalink / raw)
To: linux-kernel mailing list; +Cc: alandpearson
alan pearson writes:
> On 2.6 the iowait jumps to around 70%, while 2.4 on
> both tests it is firmly zero.
The 2.4 kernel lumps iowait into idle, so you
won't see iowait on a 2.4 kernel.
> On disk read, I'm loosing 30 Mb/sec of bandwidth PER
> DISK, compared to 2.4.20.
> I've tried using both the deadline and as ioschedulers
> but no difference.
>
>
> Under real conditions (ie our application running
> which reads from all the disks simultaneously) on
> 2.6.4, the system performance is around 1/3 of 2.4.20)
>
> Summary MB/Sec :
>
> dd if=x dd if=/dev/zero
> 2.4 64 35.6
> 2.6 30.34 35.9
Well, that looks serious, but unfortunately you
can't tell what the iowait was on the 2.4 kernel.
Only the 2.6 kernel provides this information.
^ permalink raw reply [flat|nested] 2+ messages in thread
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