One thing I don't understand is when I look at xc_linux_save.c's
suspend_and_state function - it appears it does:
xcio_suspend_domain(ioctxt);
retry:
... stuff tries to see if xcio_suspend_domain worked - is that correct?
Should the xcio_suspend_domain() call be after the retry: label? Or does that
xcio_suspend_domain call guarantee the message is delivered and the code under
retry: is just waiting for the state to now change?
Second, I see it tries 100 times with a 10,000microsecond sleep inbetween. So
it only waits for 1 second for the domain to suspend. I realize 1 second is a
really long time in terms of computing. But I'm wondering what all conditions
must be true for it to be able to suspend a domain. Could there legitimately
be times when it would take longer than a second for suspension?
-- Ray
> -----Original Message-----
> From: Cole, Ray
> Sent: Wednesday, August 24, 2005 5:33 PM
> To: 'xen-users@xxxxxxxxxxxxxxxxxxx'
> Subject: RE: Re: [Xen-users] Live migration problem
>
> This is a snippet from the originating host's xfrd.log when the failure
> happened. Meanwhile the other side's xfrd.log looked good until it got an
> 'Error when reading from state file'.
>
>
> -- Ray
>
>
> -----
>
>
> 1: sent 45431, skipped 3721,
>
> 1: sent 45431, skipped 3721, delta 16818ms, dom0 23%, target 9%, sent
> 88Mb/s, dirtied 8Mb/s 4557 pages
> [1124922400.612070] Saving memory pages: iter 2 0%
> Saving memory pages: iter 2 0% 22%
> 22% 47%
> 47% 71%
> 71%
> 2: sent 4054, skipped 500,
>
> 2: sent 4054, skipped 500, delta 1571ms, dom0 22%, target 21%, sent 84Mb/s,
> dirtied 64Mb/s 3116 pages
> [1124922402.183740] Saving memory pages: iter 3 0%
> Saving memory pages: iter 3 0% 31%
> 31% 73%
> 73%
> 3: sent 2693, skipped 420,
>
> 3: sent 2693, skipped 420, delta 1022ms, dom0 23%, target 19%, sent 86Mb/s,
> dirtied 65Mb/s 2053 pages
> [1124922403.205810] Saving memory pages: iter 4 0%
> Saving memory pages: iter 4 0% 48%
> 48%
> 4: sent 1874, skipped 176,
>
> 4: sent 1874, skipped 176, delta 705ms, dom0 23%, target 17%, sent 87Mb/s,
> dirtied 61Mb/s 1315 pages
> [1124922403.911777] Saving memory pages: iter 5 0%
> Saving memory pages: iter 5 0% 87%
> 87%
> 5: sent 1107, skipped 201,
>
> 5: sent 1107, skipped 201, delta 470ms, dom0 21%, target 40%, sent 77Mb/s,
> dirtied 128Mb/s 1846 pages
> [1124922404.382522] Saving memory pages: iter 6 0%
> Saving memory pages: iter 6 0% 63%
> 63%
> 6: sent 1491, skipped 349,
>
> 6: sent 1491, skipped 349, delta 609ms, dom0 22%, target 46%, sent 80Mb/s,
> dirtied 142Mb/s 2647 pages
> [1124922404.992153] Saving memory pages: iter 7 0%
> Saving memory pages: iter 7 0% 38%
> 38% 79%
> 79%
> 7: sent 2348, skipped 295,
>
> 7: sent 2348, skipped 295, delta 890ms, dom0 23%, target 18%, sent 86Mb/s,
> dirtied 102Mb/s 2797 pages
> [1124922405.882768] Saving memory pages: iter 8 0%
> Saving memory pages: iter 8 0% 38%
> 38% 84%
> 84%
> 8: sent 2409, skipped 384,
>
> 8: sent 2409, skipped 384, delta 860ms, dom0 24%, target 6%, sent 91Mb/s,
> dirtied 27Mb/s 713 pages
> [1124922406.742903] Saving memory pages: iter 9 0%
> Saving memory pages: iter 9 0%
> 9: sent 624, skipped 83,
>
> 9: sent 624, skipped 83, delta 230ms, dom0 23%, target 9%, sent 88Mb/s,
> dirtied 58Mb/s 410 pages
> [1124922406.973505] Saving memory pages: iter 10 0%
> Saving memory pages: iter 10 0%
> 10: sent 404, skipped 0,
>
> 10: sent 404, skipped 0, delta 142ms, dom0 26%, target 6%, sent 93Mb/s,
> dirtied 51Mb/s 223 pages
> [1124922407.118014] Saving memory pages: iter 11 0%
> Saving memory pages: iter 11 0%
> 11: sent 127, skipped 89,
>
> 11: sent 127, skipped 89, delta 47ms, dom0 29%, target 6%, sent 88Mb/s,
> dirtied 150Mb/s 216 pages
> [1124922407.163792] Saving memory pages: iter 12 0%>
> Saving memory pages: iter 12 0%
> 12: sent 210, skipped 0,
>
> 12: sent 210, skipped 0, delta 78ms, dom0 25%, target 10%, sent 88Mb/s,
> dirtied 132Mb/s 315 pages
> [1124922407.242383] Saving memory pages: iter 13 0%
> Saving memory pages: iter 13 0%
> 13: sent 309, skipped 0,
>
> 13: sent 309, skipped 0, delta 113ms, dom0 25%, target 7%, sent 89Mb/s,
> dirtied 91Mb/s 317 pages
> [1124922407.355431] Saving memory pages: iter 14 0%
> Saving memory pages: iter 14 0%
> 14: sent 310, skipped 0,
>
> 14: sent 310, skipped 0, delta 113ms, dom0 25%, target 7%, sent 89Mb/s,
> dirtied 82Mb/s 283 pages
> [1124922407.468703] Saving memory pages: iter 15 0%
> Saving memory pages: iter 15 0%
> 15: sent 277, skipped 0,
>
> 15: sent 277, skipped 0, delta 99ms, dom0 26%, target 7%, sent 91Mb/s,
> dirtied 94Mb/s 287 pages
> [1124922407.568408] Saving memory pages: iter 16 0%
> Saving memory pages: iter 16 0%
> 16: sent 281, skipped 0,
>
> 16: sent 281, skipped 0, delta 102ms, dom0 26%, target 8%, sent 90Mb/s,
> dirtied 107Mb/s 334 pages
> [1124922407.671120] Saving memory pages: iter 17 0%
> Saving memory pages: iter 17 0%
> 17: sent 243, skipped 86,
>
> 17: sent 243, skipped 86, delta 93ms, dom0 25%, target 13%, sent 85Mb/s,
> dirtied 135Mb/s 385 pages
> [1124922407.764443] Saving memory pages: iter 18 0%
> Saving memory pages: iter 18 0%
> 18: sent 378, skipped 0,
>
> 18: sent 378, skipped 0, delta 144ms, dom0 24%, target 11%, sent 86Mb/s,
> dirtied 82Mb/s 363 pages
> [1124922407.908636] Saving memory pages: iter 19 0%
> Saving memory pages: iter 19 0%
> 19: sent 355, skipped 0,
>
> 19: sent 355, skipped 0, delta 130ms, dom0 26%, target 6%, sent 89Mb/s,
> dirtied 71Mb/s 283 pages
> [1124922408.038797] Saving memory pages: iter 20 0%
> Saving memory pages: iter 20 0%
> 20: sent 185, skipped 92,
>
> 20: sent 185, skipped 92, delta 106ms, dom0 17%, target 81%, sent 57Mb/s,
> dirtied 218Mb/s 707 pages
> [1124922408.145378] Saving memory pages: iter 21 0%
> Saving memory pages: iter 21 0%
> 21: sent 619, skipped 83,
>
> 21: sent 619, skipped 83, delta 229ms, dom0 23%, target 13%, sent 88Mb/s,
> dirtied 94Mb/s 657 pages
> [1124922408.375295] Saving memory pages: iter 22 0%
> Saving memory pages: iter 22 0%
> 22: sent 651, skipped 0,
>
> 22: sent 651, skipped 0, delta 231ms, dom0 25%, target 2%, sent 92Mb/s,
> dirtied 18Mb/s 130 pages
> [1124922408.606305] Saving memory pages: iter 23 0%
> Saving memory pages: iter 23 0%
> 23: sent 124, skipped 0,
>
> 23: sent 124, skipped 0, delta 45ms, dom0 31%, target 6%, sent 90Mb/s,
> dirtied 120Mb/s 166 pages
> [1124922408.651758] Saving memory pages: iter 24 0%
> Saving memory pages: iter 24 0%
> 24: sent 159, skipped 0,
>
> 24: sent 159, skipped 0, delta 57ms, dom0 28%, target 8%, sent 91Mb/s,
> dirtied 143Mb/s 249 pages
> [1124922408.709624] Saving memory pages: iter 25 0%
> Saving memory pages: iter 25 0%
> 25: sent 243, skipped 0,
>
> 25: sent 243, skipped 0, delta 102ms, dom0 21%, target 79%, sent 78Mb/s,
> dirtied 57Mb/s 178 pages
> [1124922408.812289] Saving memory pages: iter 26 0%
> Saving memory pages: iter 26 0%
> 26: sent 168, skipped 4,
>
> 26: sent 168, skipped 4, delta 70ms, dom0 21%, target 78%, sent 78Mb/s,
> dirtied 20Mb/s 43 pages
> [1124922408.883198] Saving memory pages: iter 27 0%
> Saving memory pages: iter 27 0%
> 27: sent 39, skipped 4,
>
> 27: sent 39, skipped 4, [DEBUG] Conn_sxpr>
> (xfr.err 22)[DEBUG] Conn_sxpr< err=0
> Retry suspend domain (0)
> ...repeated many times...
> Retry suspend domain (0)
> Retry suspend domain (0)
> Unable to suspend domain. (0)
> Unable to suspend domain. (0)
> Domain appears not to have suspended: 0
> Domain appears not to have suspended: 0
> 6638 [WRN] XFRD> Transfer errors:
> 6638 [WRN] XFRD> state=XFR_STATE err=1
> 6638 [INF] XFRD> Xfr service err=1
>
> -- Ray
>
> -----Original Message----->
> From: Cole, Ray
> Sent: Wednesday, August 24, 2005 11:32 AM
> To: 'xen-users@xxxxxxxxxxxxxxxxxxx'
> Subject: Re: [Xen-users] Live migration problem
>
> I'm having the exact same issue here with 2.0.7. I'm using RedHat AS 4
> on one machine, Fedora Core 4 on the other using xen 2.0.7 built from source.
> The guest OS is RH AS 4. I'm also able to migrate a number of times in a
> row without a problem, but periodically get the exact same errors that Steven
> Yelton posted. If my guest OS is more or less idle it seems to be less
> likely to happen. But if I start a big compile job and trying to do the
> migrate it is more likely to fail.
>
> -- Ray
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