lkml.org 
[lkml]   [2005]   [Feb]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.6.10: kswapd spins like crazy
Terje Fåberg <terje_fb@yahoo.no> skrev: 

> The kernel is compiling right now, but I cannot
> reboot this machine until six or seven o'clock
> tonight (CET). I will report then.

Well, well, I rebooted the same kernel, now with
MAGIC-SYSRQ enabled. At first the kswapd-effect
wouldn't show up, but now the image is much clearer
than before. kswapd eats constantly 95% cpu time while
the system is "idle".

The System is quite sluggish. Switching between
applications needs ages. After Eclipse has been active
for a few minutes, I it lasts 45 seconds until enough
of Mozilla is swapped back in, and Mozilla has redrawn
its window.

Complete info including SysRq-Meminfo is attached.

Regards,
Terje

galileo:~# 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 286576 4984 8712 352232 0 0 0 88 1015 4288 5 95 0 0
1 0 286576 4984 8712 352232 0 0 0 0 1002 4278 5 95 0 0
1 0 286576 4984 8712 352232 32 0 32 0 1003 4365 7 93 0 0
1 0 286576 4984 8736 352256 0 0 40 0 1010 4296 6 94 0 0
2 1 286696 4856 8756 352328 0 120 920 120 1081 4406 4 96 0 0
1 0 287068 4936 8832 352496 104 448 588 568 1072 4422 7 93 0 0
1 0 287068 4936 8832 352496 0 0 0 0 1002 4275 5 95 0 0
1 0 287068 4936 8832 352496 0 0 0 0 1002 4289 6 94 0 0
1 0 287068 4936 8832 352496 0 0 0 0 1002 4324 6 94 0 0
1 0 287068 4936 8832 352496 0 0 0 0 1002 4285 5 95 0 0
1 0 287068 4936 8832 352496 0 0 0 0 1002 4271 5 95 0 0
1 0 287068 4936 8832 352496 0 0 0 0 1002 4335 6 94 0 0
1 0 287068 4936 8832 352496 0 0 0 0 1002 4297 5 95 0 0
galileo:~# cat /proc/vmstat > pre ; sleep 10 ; cat /proc/vmstat > post
galileo:~# cat pre
nr_dirty 201
nr_writeback 0
nr_unstable 0
nr_page_table_pages 1667
nr_mapped 113889
nr_slab 4289
pgpgin 1653048
pgpgout 532204
pswpin 67956
pswpout 84224
pgalloc_high 0
pgalloc_normal 6255968
pgalloc_dma 91765
pgfree 6350163
pgactivate 381383
pgdeactivate 364613
pgfault 2110239
pgmajfault 36305
pgrefill_high 0
pgrefill_normal 4903463
pgrefill_dma 116195
pgsteal_high 0
pgsteal_normal 366259
pgsteal_dma 17568
pgscan_kswapd_high 0
pgscan_kswapd_normal 2504667
pgscan_kswapd_dma 615532032
pgscan_direct_high 0
pgscan_direct_normal 60489
pgscan_direct_dma 11979
pginodesteal 0
slabs_scanned 510336
kswapd_steal 364044
kswapd_inodesteal 99903
pageoutrun 105762
allocstall 435
pgrotated 77400

galileo:~# cat post
nr_dirty 31
nr_writeback 0
nr_unstable 0
nr_page_table_pages 1667
nr_mapped 113890
nr_slab 4285
pgpgin 1653308
pgpgout 532340
pswpin 67956
pswpout 84224
pgalloc_high 0
pgalloc_normal 6290302
pgalloc_dma 91765
pgfree 6384390
pgactivate 381413
pgdeactivate 364613
pgfault 2110638
pgmajfault 36308
pgrefill_high 0
pgrefill_normal 4903463
pgrefill_dma 116195
pgsteal_high 0
pgsteal_normal 366259
pgsteal_dma 17568
pgscan_kswapd_high 0
pgscan_kswapd_normal 2504667
pgscan_kswapd_dma 649881006
pgscan_direct_high 0
pgscan_direct_normal 60489
pgscan_direct_dma 11979
pginodesteal 0
slabs_scanned 514944
kswapd_steal 364044
kswapd_inodesteal 99903
pageoutrun 111269
allocstall 435
pgrotated 77400

galileo:~# cat /proc/meminfo
MemTotal: 645976 kB
MemFree: 8776 kB
Buffers: 9228 kB
Cached: 350380 kB
SwapCached: 74776 kB
Active: 443452 kB
Inactive: 97500 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 645976 kB
LowFree: 8776 kB
SwapTotal: 2101056 kB
SwapFree: 1812348 kB
Dirty: 56 kB
Writeback: 0 kB
Mapped: 455596 kB
Slab: 17124 kB
CommitLimit: 2424044 kB
Committed_AS: 1216312 kB
PageTables: 6668 kB
VmallocTotal: 384980 kB
VmallocUsed: 16420 kB
VmallocChunk: 367568 kB

galileo:~# uname -a
Linux galileo 2.6.10-4 #7 Thu Feb 3 16:34:30 CET 2005 i686 GNU/Linux

galileo:~# uptime
20:39:55 up 50 min, 2 users, load average: 4.54, 3.05, 2.25

galileo:~# ps aux | grep kswapd
root 105 34.5 0.0 0 0 ? R 19:49 17:27 [kswapd0]
root 8111 0.0 0.0 1548 444 pts/4 S+ 20:39 0:00 grep kswapd
galileo:~# dmesg
[...]
SysRq : Show Memory
Mem-info:
DMA per-cpu:
cpu 0 hot: low 2, high 6, batch 1
cpu 0 cold: low 0, high 2, batch 1
Normal per-cpu:
cpu 0 hot: low 32, high 96, batch 16
cpu 0 cold: low 0, high 32, batch 16
HighMem per-cpu: empty

Free pages: 7872kB (0kB HighMem)
Active:48698 inactive:86241 dirty:0 writeback:0 unstable:0 free:1968 slab:4509 mapped:50560 pagetables:1717
DMA free:80kB min:80kB low:100kB high:120kB active:0kB inactive:11716kB present:16384kB pages_scanned:123 all_unreclaimable? no
protections[]: 0 0 0
Normal free:7792kB min:3152kB low:3940kB high:4728kB active:194792kB inactive:333248kB present:638976kB pages_scanned:0all_unreclaimable? no
protections[]: 0 0 0
HighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
protections[]: 0 0 0
DMA: 0*4kB 0*8kB 1*16kB 0*32kB 1*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 80kB
Normal: 590*4kB 153*8kB 59*16kB 4*32kB 1*64kB 0*128kB 0*256kB 0*512kB 1*1024kB 1*2048kB 0*4096kB = 7792kB
HighMem: empty
Swap cache: add 173594, delete 157410, find 30045/43843, race 0+0
Free swap: 1763412kB
163840 pages of RAM
0 pages of HIGHMEM
9692 reserved pages
156561 pages shared
16184 pages swap cached

\
 
 \ /
  Last update: 2005-03-22 14:10    [from the cache]
©2003-2011 Jasper Spaans