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dol-sen
Retired Dev
Joined: 30 Jun 2002
Posts: 2805
Location: Richmond, BC, Canada
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 Posted: Thu Feb 17, 2011 6:21 am Post subject: |
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Yes, having little space can slow the filesystem as veldrin has said, but also running torrents while trying to compile will slow it down as well. Plan your compiles at times when it won't be busy up/downloading torrents. Unless the torrents are on a completely different drive (not just a different partition) it will very definitely slow it down. Hard drives and IO operations are usually the slow point of the system already. Making it time share frequently with torrents makes an already slow operation even slower.
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Brian
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padoor
Advocate
Joined: 30 Dec 2005
Posts: 4185
Location: india
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| Posted: Thu Feb 17, 2011 6:56 am Post subject: |
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i will plan to put the torrent downloads in usb hdd. there torrents hardly downloads 100mb in an hour.
yes i understand the time sharing of writing to hdd by compile and any other activity like downloads/uploads
well i hope i can cut down the 10hrs compile to 5 hrs at least.
too many packages installed also causing the compile time more for each depends 
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aderesch
Tux's lil' helper
Joined: 06 Mar 2010
Posts: 123
Location: Hamburg, Germany
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| Posted: Thu Feb 17, 2011 5:52 pm Post subject: |
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| padoor wrote: | | Code: | localhost ramaswamy # hdparm -Tt /dev/sda
/dev/sda:
Timing cached reads: 408 MB in 2.00 seconds = 203.89 MB/sec
Timing buffered disk reads: 130 MB in 3.02 seconds = 43.07 MB/sec
localhost ramaswamy # |
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Your raw disk speed is fine for this type of computer -- faster than mine anyway. Use bonnie++ to assess actual performance at the filesystem level.
What worries me is the value for cached reads (closely related to RAM throughput). I get ~700MB/s on an unloaded system, not less than ~370MB/s under load. Try to check the RAM settings in the BIOS, run memtest86+ to get some indication of raw memory speed.
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Veldrin
Veteran
Joined: 27 Jul 2004
Posts: 1945
Location: Zurich, Switzerland
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| Posted: Thu Feb 17, 2011 7:19 pm Post subject: |
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I am moving towards mis-configured I/O scheduler, thrashing and similar.
what is your normal ram usage? (free -m)
what i/o scheduler are you using? (cat /sys/block/sda/queue/scheduler)
how much disk usage do you have? (i.e how lit up is the disk indicator?)
I use gkrellm to monitor system resources. but alas this is a graphic tool, and hard to capture
alternatively you may use vmstat (post the result of vmstat 1 60 (60 mesurements in 1 second intervals))
V.
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padoor
Advocate
Joined: 30 Dec 2005
Posts: 4185
Location: india
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| Posted: Fri Feb 18, 2011 2:20 am Post subject: |
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| Code: | ramaswamy@localhost ~ $ free -m
total used free shared buffers cached
Mem: 2022 965 1057 0 166 365
-/+ buffers/cache: 432 1590
Swap: 956 0 956
ramaswamy@localhost ~ $ cat /sys/block/sda/queue/scheduler
noop deadline [cfq]
ramaswamy@localhost ~ $ vmstat 1 60
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 1075100 171220 385220 0 0 288 65 1030 1378 28 8 54 11
1 0 0 1065916 171220 385212 0 0 4 0 1609 1231 92 7 0 1
3 0 0 1063684 171220 385216 0 0 0 0 1657 1314 92 8 0 0
1 0 0 1058228 171220 385216 0 0 0 76 1677 1277 93 7 0 0
1 0 0 1067156 171220 385264 0 0 20 36 1668 1316 83 15 0 2
1 0 0 1077448 171228 385324 0 0 0 52 1644 1273 92 8 0 0
1 0 0 1068644 171228 385292 0 0 12 68 1674 1344 81 19 0 0
1 0 0 1066784 171228 385320 0 0 24 28 1656 1274 86 13 0 1
1 0 0 1068396 171228 385368 0 0 32 316 1705 1321 85 15 0 0
2 0 0 1057980 171228 385368 0 0 0 0 1656 1264 89 11 0 0
2 0 0 1060708 171228 385392 0 0 12 32 1670 1319 86 14 0 0
2 0 0 1061948 171236 385412 0 0 12 84 1664 1295 88 11 0 1
4 0 0 1061452 171260 385608 0 0 44 212 1652 1351 80 18 0 2
2 0 0 1066552 171260 385716 0 0 52 64 1692 1338 84 15 0 1
2 0 0 1060328 171260 385716 0 0 0 0 1694 1292 90 10 0 0
3 0 0 1064576 171260 385728 0 0 16 28 1679 1316 88 12 0 0
1 0 0 1063428 171260 385808 0 0 60 28 1655 1338 82 15 0 3
2 0 0 1056608 171260 385808 0 0 0 0 1667 1254 92 8 0 0
1 0 0 1070000 171268 385808 0 0 4 200 1672 1319 87 13 0 0
1 0 0 1065164 171268 385840 0 0 8 28 1661 1293 85 14 0 1
1 0 0 1066776 171268 385876 0 0 20 36 1654 1316 85 14 0 1
3 0 0 1076324 171268 385888 0 0 8 28 1653 1282 84 15 0 1
2 0 0 1065412 171268 385912 0 0 20 28 1669 1297 88 12 0 0
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
2 0 0 1060700 171276 385928 0 0 8 148 1671 1309 85 15 0 0
1 0 0 1059460 171284 386196 0 0 20 28 1681 1339 86 14 0 0
1 0 0 1071612 171284 386288 0 0 12 32 1678 1339 87 13 0 0
1 0 0 1056236 171284 386256 0 0 28 28 1666 1290 84 15 0 1
2 0 0 1062436 171284 386276 0 0 12 36 1706 1313 85 15 0 0
1 0 0 1062188 171292 386288 0 0 4 136 1709 1333 83 16 0 1
1 0 0 1060700 171292 386308 0 0 16 24 1691 1305 85 15 0 0
1 0 0 1057600 171292 386324 0 0 8 24 1681 1331 86 14 0 0
1 0 0 1060452 171292 386332 0 0 4 36 1660 1294 85 14 0 1
4 0 0 1064296 171292 386356 0 0 20 32 1668 1270 85 15 0 0
1 0 0 1056608 171300 386348 0 0 0 88 1674 1261 89 11 0 0
1 0 0 1057600 171300 386376 0 0 8 32 1677 1310 84 15 0 1
1 0 0 1062064 171300 386384 0 0 4 40 1665 1296 85 15 0 0
1 0 0 1060444 171300 386672 0 0 284 28 1603 1367 68 20 0 12
1 0 0 1060692 171300 386720 0 0 36 32 1667 1287 86 14 0 0
3 0 0 1067884 171308 386712 0 0 8 260 1690 1319 88 12 0 0
2 0 0 1066272 171308 386740 0 0 4 24 1655 1295 85 15 0 0
1 0 0 1063668 171308 386776 0 0 20 24 1662 1307 86 14 0 0
1 0 0 1064784 171308 386788 0 0 12 52 1657 1316 82 18 0 0
1 0 0 1060320 171308 386812 0 0 8 24 1685 1290 84 15 0 1
1 0 0 1063544 171308 386808 0 0 4 516 1710 1541 82 18 0 0
0 1 0 1070860 171324 386884 0 0 52 136 1668 1383 78 19 0 3
0 1 0 1058336 171332 387244 0 0 364 0 1591 1368 67 21 0 12
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 1057600 171332 387296 0 0 48 32 1636 1320 81 14 0 5
2 0 0 1054996 171336 387724 0 0 408 32 1672 1293 82 17 0 1
1 0 0 1055244 171336 387740 0 0 8 68 1657 1284 84 16 0 0
1 0 0 1059832 171344 387772 0 0 24 84 1650 1267 83 16 0 1
1 0 0 1067396 171348 387836 0 0 68 36 1674 1324 85 15 0 0
1 0 0 1055864 171348 387848 0 0 0 0 1658 1257 90 10 0 0
1 0 0 1054500 171348 387848 0 0 0 0 1682 1297 94 6 0 0
1 0 0 1064916 171348 387880 0 0 16 88 1673 1277 86 14 0 0
1 0 0 1056608 171356 387880 0 0 8 48 1642 1279 88 10 0 2
2 0 0 1057848 171356 387908 0 0 12 36 1660 1301 86 14 0 0
1 0 0 1060328 171356 387920 0 0 4 36 1675 1306 86 14 0 0
1 0 0 1060328 171356 387928 0 0 4 32 1665 1276 85 15 0 0
1 1 0 1073256 171368 388232 0 0 284 352 1561 1395 61 21 0 19
1 0 0 1058964 171368 388384 0 0 128 0 1679 1284 82 17 0 1
ramaswamy@localhost ~ $
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running desktop kde-3.5 [sunset]
at this moment of above measurement kernel is being made for udf support[make && make modules_install] for
current booted kernel-2.6.36-gentoo-r5
opera is open with 16 tabs
sda2 thunar file manager open
vlc idle
current freespace in / is 7GB of 28GB
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