Re: 2.4.10aa1 (00_vm-tweaks-1)

Adrian Bunk
2001-09-27T13:29:11Z

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On Tue, 25 Sep 2001, Andrea Arcangeli wrote:

>...
> > FVWM with 6 open xterms is running
> > XMMS is running
> >
> > mv linux linux.old
> > nice rm -rf linux.old &
> > tar xzf linux-2.4.10.tar.gz &
> > lynx ftp://ftp.kernel.org/pub/linux/kernel/testing
>...
> > 2.4.10 + 00_vm-tweaks-1:
> > interactive use of the machine works all right, but XMMS does sometimes
> > stutter
>
> it didn't happen here but let's look into it.
>
> > This is on a K6 with 300 Mhz. free in 2.4.10 + 00_vm-tweaks-1 gives the
>...
> > My impression is that there's a problem when several processes do heavy
> > non-cachable disk IO.
>
> I've a few ideas on what to change incrementally to vm-tweaks-1, but can
> you send me the `vmstat 1` output, plus also the /proc/meminfo output
> snapshotted at regular intervals while xmms is "stuttering" just to
> avoid looking at the wrong place? thanks,

Attached are:

vmstat: `vmstat 1` output continuously from the beginning of the test
(includes several stuttering periods)

meminfo: /proc/meminfo output of three times when I heard it stuttering
(XMMS doesn't stutter continuously but it has stuttering periods that last
a few seconds - I hope I catched the right moments)

> Andrea

cu
Adrian

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procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
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1 4 1 11532 2432 3156 24436 0 0 298 897 230 1973 31 20 49
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1 3 2 11760 1816 2948 25336 0 0 408 1675 283 1177 28 16 56
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0 4 1 11760 2312 2888 24884 0 0 487 1548 241 2010 66 25 9
4 1 2 11760 2304 2904 24872 0 0 561 998 226 1559 27 22 51
3 2 1 11672 2312 2816 25272 0 0 743 893 226 2181 54 33 12
2 3 3 11672 2096 2800 25456 0 0 364 1546 270 1544 34 16 50
3 2 3 11672 1824 2764 25736 0 0 270 847 272 1203 18 14 67
3 3 2 11672 2464 2704 24984 0 0 400 682 260 1177 22 17 61
2 2 1 11672 1980 2732 25436 0 0 743 914 257 1858 44 29 27
2 3 1 11672 1908 2760 25372 0 0 476 2311 259 1407 23 27 50
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
3 1 2 11672 1852 2764 25160 0 0 442 1043 258 1349 26 20 54
1 3 1 11672 1800 2780 25168 0 0 594 1232 281 1482 36 19 45
0 4 2 11672 1884 2764 25100 0 0 37 381 304 783 9 8 84
0 4 1 11672 1856 2776 25116 0 0 253 418 227 799 13 6 82
0 4 1 11672 2276 2748 24708 0 0 202 1251 333 927 9 12 80
0 4 1 11672 2236 2696 24800 0 0 221 1005 230 704 6 6 88
1 3 2 11672 2432 2664 24596 0 0 464 1343 251 1713 38 21 41
2 4 2 11672 1976 2656 24940 0 0 548 524 320 1368 74 21 5
2 3 1 11672 2252 2664 24732 0 0 170 645 288 1170 34 8 58
3 2 1 11672 1848 2680 25100 0 0 314 160 285 1432 20 11 69
4 1 2 11672 1916 2672 25024 0 0 166 946 246 1406 15 16 68
1 3 1 11672 2212 2324 25040 0 0 491 2865 250 2142 44 36 20
1 3 2 11672 1976 2028 25536 0 0 518 1113 327 2071 37 31 33
1 3 1 11672 2048 1952 25528 0 0 299 1094 307 1583 24 22 54
2 3 1 11672 1888 1976 25572 0 0 432 1152 268 1581 34 19 47
0 4 1 11672 1872 2020 25488 0 0 624 2113 244 1871 39 24 37
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0 3 1 11672 1936 1924 25272 0 0 419 1952 204 1673 48 20 32
1 2 1 11672 2184 1928 25004 0 0 417 1570 252 1486 39 20 41
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procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
1 2 1 11672 2528 1964 24564 0 0 660 1573 246 1756 79 17 4
2 2 2 11672 2300 1928 24784 0 0 683 2369 258 2253 61 35 4
1 2 1 11672 1944 1948 25088 0 0 435 2080 216 2068 44 32 24
2 2 1 11672 2576 1964 24412 0 0 460 1765 208 1864 47 23 30
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0 3 1 11672 2696 1820 24328 0 0 565 1602 269 1853 46 20 34
3 0 2 11672 2112 1828 24872 0 0 413 1220 219 1656 75 19 7
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2 2 1 11672 2248 1824 24552 0 0 322 1408 224 2350 45 22 33
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3 1 1 11672 2328 1824 24424 0 0 317 1284 242 2084 50 19 31
1 3 1 11672 3344 1832 24308 0 0 422 1056 233 1628 40 17 43
0 3 1 11672 2008 1880 25536 0 0 561 1667 237 2014 47 25 28
2 2 2 11672 2256 1868 25272 0 0 288 1568 247 1790 29 27 45
4 0 1 11672 2132 1912 25312 0 0 445 1344 222 1726 53 15 31
0 3 1 11672 2144 1948 25232 0 0 441 1477 252 1777 38 28 35
0 3 1 11672 1992 1964 25304 0 0 283 1504 281 1723 31 21 48
5 0 2 11672 1868 1984 25368 0 0 530 1345 239 2003 67 19 14
3 1 2 11672 2284 1968 24900 0 0 554 1792 299 1928 77 22 1
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
2 2 1 11672 2408 1996 24648 0 0 281 1797 224 1972 31 30 39
2 2 2 11672 2160 2040 24780 0 0 436 1728 271 2382 50 26 24