[Bug 1854961] Re: subiquity download progress-bar on s390x swamps console messages and buffer
Ubuntu Foundations Team Bug Bot
1854961 at bugs.launchpad.net
Wed Dec 4 16:27:41 UTC 2019
** Tags added: patch
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https://bugs.launchpad.net/bugs/1854961
Title:
subiquity download progress-bar on s390x swamps console messages and
buffer
Status in subiquity:
Invalid
Status in Ubuntu on IBM z Systems:
New
Status in casper package in Ubuntu:
Fix Committed
Status in casper source package in Eoan:
Confirmed
Bug description:
The challenge here is that due to the limited functionality in the IBM Z and LinuxONE console ("Operating System Messages" task)
a progress-bar is not replacing it's current line with an updated progress (consuming just a single line), but just instead prints a new line on every update.
Hence one line per update is printed and in case of high update intervalls that swamps the console buffer and leads to partly unresponsive (browser-based) console window (probably due to the high amount of data).
As an example we have here 145 lines, and with that updates, for the
"8%" download status - that makes up about 1500 lines in total for the
entire download (100%).
"57950K .......... .......... .......... .......... 8% 93.1M 6s"
"58000K .......... .......... .......... .......... 8% 142M 6s"
"58050K .......... .......... .......... .......... 8% 107M 6s"
"58100K .......... .......... .......... .......... 8% 110M 6s"
"58150K .......... .......... .......... .......... 8% 129M 6s"
"58200K .......... .......... .......... .......... 8% 98.8M 6s"
"58250K .......... .......... .......... .......... 8% 111M 6s"
"58300K .......... .......... .......... .......... 8% 91.6M 6s"
"58350K .......... .......... .......... .......... 8% 119M 6s"
"58400K .......... .......... .......... .......... 8% 166M 6s"
"58450K .......... .......... .......... .......... 8% 81.2M 6s"
"58500K .......... .......... .......... .......... 8% 139M 6s"
"58550K .......... .......... .......... .......... 8% 95.8M 6s"
"58600K .......... .......... .......... .......... 8% 149M 6s"
"58650K .......... .......... .......... .......... 8% 85.6M 6s"
"58700K .......... .......... .......... .......... 8% 144M 6s"
"58750K .......... .......... .......... .......... 8% 105M 6s"
"58800K .......... .......... .......... .......... 8% 136M 6s"
"58850K .......... .......... .......... .......... 8% 81.4M 6s"
"58900K .......... .......... .......... .......... 8% 71.7M 6s"
"58950K .......... .......... .......... .......... 8% 6.59M 6s"
"59000K .......... .......... .......... .......... 8% 9.40M 6s"
"59050K .......... .......... .......... .......... 8% 103M 6s"
"59100K .......... .......... .......... .......... 8% 138M 6s"
"59150K .......... .......... .......... .......... 8% 85.4M 6s"
"59200K .......... .......... .......... .......... 8% 133M 6s"
"59250K .......... .......... .......... .......... 8% 131M 6s"
"59300K .......... .......... .......... .......... 8% 107M 6s"
"59350K .......... .......... .......... .......... 8% 115M 6s"
"59400K .......... .......... .......... .......... 8% 107M 6s"
"59450K .......... .......... .......... .......... 8% 100M 6s"
"59500K .......... .......... .......... .......... 8% 111M 6s"
"59550K .......... .......... .......... .......... 8% 125M 6s"
"59600K .......... .......... .......... .......... 8% 107M 6s"
"59650K .......... .......... .......... .......... 8% 116M 6s"
"59700K .......... .......... .......... .......... 8% 85.2M 6s"
"59750K .......... .......... .......... .......... 8% 151M 6s"
"59800K .......... .......... .......... .......... 8% 108M 6s"
"59850K .......... .......... .......... .......... 8% 114M 6s"
"59900K .......... .......... .......... .......... 8% 100M 6s"
"59950K .......... .......... .......... .......... 8% 133M 6s"
"60000K .......... .......... .......... .......... 8% 111M 6s"
"60050K .......... .......... .......... .......... 8% 125M 6s"
"60100K .......... .......... .......... .......... 8% 83.9M 6s"
"60150K .......... .......... .......... .......... 8% 108M 6s"
"60200K .......... .......... .......... .......... 8% 97.6M 6s"
"60250K .......... .......... .......... .......... 8% 131M 6s"
"60300K .......... .......... .......... .......... 8% 110M 6s"
"60350K .......... .......... .......... .......... 8% 96.1M 6s"
"60400K .......... .......... .......... .......... 8% 166M 6s"
"60450K .......... .......... .......... .......... 8% 98.7M 6s"
"60500K .......... .......... .......... .......... 8% 130M 6s"
"60550K .......... .......... .......... .......... 8% 94.0M 6s"
"60600K .......... .......... .......... .......... 8% 100M 6s"
"60650K .......... .......... .......... .......... 8% 154M 6s"
"60700K .......... .......... .......... .......... 8% 99.0M 6s"
"60750K .......... .......... .......... .......... 8% 153M 6s"
"60800K .......... .......... .......... .......... 8% 84.8M 6s"
"60850K .......... .......... .......... .......... 8% 107M 6s"
"60900K .......... .......... .......... .......... 8% 152M 6s"
"60950K .......... .......... .......... .......... 8% 96.1M 6s"
"61000K .......... .......... .......... .......... 8% 156M 6s"
"61050K .......... .......... .......... .......... 8% 105M 6s"
"61100K .......... .......... .......... .......... 8% 76.0M 6s"
"61150K .......... .......... .......... .......... 8% 178M 6s"
"61200K .......... .......... .......... .......... 8% 125M 6s"
"61250K .......... .......... .......... .......... 8% 95.2M 6s"
"61300K .......... .......... .......... .......... 8% 144M 6s"
"61350K .......... .......... .......... .......... 8% 76.9M 6s"
"61400K .......... .......... .......... .......... 8% 136M 6s"
"61450K .......... .......... .......... .......... 8% 125M 6s"
"61500K .......... .......... .......... .......... 8% 135M 6s"
"61550K .......... .......... .......... .......... 8% 85.7M 6s"
"61600K .......... .......... .......... .......... 8% 112M 6s"
"61650K .......... .......... .......... .......... 8% 143M 6s"
"61700K .......... .......... .......... .......... 8% 105M 6s"
"61750K .......... .......... .......... .......... 8% 92.0M 6s"
"61800K .......... .......... .......... .......... 8% 141M 6s"
"61850K .......... .......... .......... .......... 8% 105M 6s"
"61900K .......... .......... .......... .......... 8% 98.5M 6s"
"61950K .......... .......... .......... .......... 8% 127M 6s"
"62000K .......... .......... .......... .......... 8% 96.2M 6s"
"62050K .......... .......... .......... .......... 8% 117M 6s"
"62100K .......... .......... .......... .......... 8% 106M 6s"
"62150K .......... .......... .......... .......... 8% 116M 6s"
"62200K .......... .......... .......... .......... 8% 102M 6s"
"62250K .......... .......... .......... .......... 8% 142M 6s"
"62300K .......... .......... .......... .......... 8% 112M 6s"
"62350K .......... .......... .......... .......... 8% 110M 6s"
"62400K .......... .......... .......... .......... 8% 134M 6s"
"62450K .......... .......... .......... .......... 8% 77.5M 6s"
"62500K .......... .......... .......... .......... 8% 63.3M 6s"
"62550K .......... .......... .......... .......... 8% 168M 6s"
"62600K .......... .......... .......... .......... 8% 97.4M 6s"
"62650K .......... .......... .......... .......... 8% 151M 6s"
"62700K .......... .......... .......... .......... 8% 90.1M 6s"
"62750K .......... .......... .......... .......... 8% 104M 6s"
"62800K .......... .......... .......... .......... 8% 111M 6s"
"62850K .......... .......... .......... .......... 8% 133M 6s"
"62900K .......... .......... .......... .......... 8% 115M 6s"
"62950K .......... .......... .......... .......... 8% 75.4M 6s"
"63000K .......... .......... .......... .......... 8% 169M 6s"
"63050K .......... .......... .......... .......... 8% 108M 6s"
"63100K .......... .......... .......... .......... 8% 127M 6s"
"63150K .......... .......... .......... .......... 8% 121M 6s"
"63200K .......... .......... .......... .......... 8% 86.6M 6s"
"63250K .......... .......... .......... .......... 8% 121M 6s"
"63300K .......... .......... .......... .......... 8% 126M 6s"
"63350K .......... .......... .......... .......... 8% 95.9M 6s"
"63400K .......... .......... .......... .......... 8% 95.5M 6s"
"63450K .......... .......... .......... .......... 8% 128M 6s"
"63500K .......... .......... .......... .......... 8% 94.6M 6s"
"63550K .......... .......... .......... .......... 8% 170M 6s"
"63600K .......... .......... .......... .......... 8% 123M 6s"
"63650K .......... .......... .......... .......... 8% 91.6M 6s"
"63700K .......... .......... .......... .......... 8% 94.3M 6s"
"63750K .......... .......... .......... .......... 8% 151M 6s"
"63800K .......... .......... .......... .......... 8% 118M 6s"
"63850K .......... .......... .......... .......... 8% 116M 6s"
"63900K .......... .......... .......... .......... 8% 79.4M 6s"
"63950K .......... .......... .......... .......... 8% 135M 6s"
"64000K .......... .......... .......... .......... 8% 129M 6s"
"64050K .......... .......... .......... .......... 8% 111M 6s"
"64100K .......... .......... .......... .......... 8% 93.3M 6s"
"64150K .......... .......... .......... .......... 8% 143M 6s"
"64200K .......... .......... .......... .......... 8% 104M 6s"
"64250K .......... .......... .......... .......... 8% 110M 6s"
"64300K .......... .......... .......... .......... 8% 142M 6s"
"64350K .......... .......... .......... .......... 8% 73.3M 6s"
"64400K .......... .......... .......... .......... 8% 127M 6s"
"64450K .......... .......... .......... .......... 8% 105M 6s"
"64500K .......... .......... .......... .......... 8% 148M 6s"
"64550K .......... .......... .......... .......... 8% 122M 6s"
"64600K .......... .......... .......... .......... 8% 75.7M 6s"
"64650K .......... .......... .......... .......... 8% 186M 6s"
"64700K .......... .......... .......... .......... 8% 102M 6s"
"64750K .......... .......... .......... .......... 8% 120M 6s"
"64800K .......... .......... .......... .......... 8% 122M 6s"
"64850K .......... .......... .......... .......... 8% 82.4M 6s"
"64900K .......... .......... .......... .......... 8% 98.9M 6s"
"64950K .......... .......... .......... .......... 8% 19.0M 6s"
"65000K .......... .......... .......... .......... 8% 3.04M 6s"
"65050K .......... .......... .......... .......... 8% 177M 6s"
"65100K .......... .......... .......... .......... 8% 84.0M 6s"
"65150K .......... .......... .......... .......... 8% 150M 6s"
And since more lines got produced than the entire console buffer can store, it results in the fact that the initial/first lines can not be reached while scrolling up.
(In fact the 'oldest' msg one can get back to is roughly:
22250K .......... .......... .......... .......... 99% 79.2M 0s
)
A quick solution would be to reduce the update interval of that
download progress-bar - e.g. by 150:1 (if possible) .
In the early boot phase it lokks nicer - just a few lines are
displayed:
"host : s1lp14"
"rootserver: 0.0.0.0 rootpath:"
"filename :"
"Connecting to 10.13.0.2:21 (10.13.0.2:21)"
"focal-live-server-s3 4% |* | 28.7M 0:00:23 ETA"
"focal-live-server-s3 16% |***** | 115M 0:00:10 ETA"
"focal-live-server-s3 27% |******** | 196M 0:00:07 ETA"
"focal-live-server-s3 38% |************ | 275M 0:00:06 ETA"
"focal-live-server-s3 50% |**************** | 360M 0:00:04 ETA"
"focal-live-server-s3 63% |******************** | 445M 0:00:03 ETA"
"focal-live-server-s3 75% |************************ | 533M 0:00:02 ETA"
"focal-live-server-s3 91% |***************************** | 645M 0:00:00 ETA"
"focal-live-server-s3 100% |********************************| 707M 0:00:00 ETA"
See attachment for an almost entire console boot-up log ...
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