| --- | Log | opened Tue Feb 08 00:00:04 2022 |
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| 06:50 | <astevanato> | Hi all, I'm trying to study the behaviour of xen, how PV network works and stuff like that. I would like to collect info of the path that the packets follow from the guest to dom0. A sort of debug. I inserted the loglvl=all and guest_loglvl=all. Is that the correct way? Since the /var/log/xen is mostly empty. There are some tools/utility that I can exploit? Do you have any resource(s) to suggest? |
| 06:55 | <andyhhp> | depends what you're trying to look for |
| 06:56 | <andyhhp> | Xen isn't involved (really) |
| 06:56 | <andyhhp> | it's domU kernel (netfront) talking to dom0 kernel (netback) |
| 06:56 | <andyhhp> | this communication is facilitated by Xen's grant table (shared memory) and evtchn (interrupts) interfaces |
| 06:57 | <andyhhp> | but they're probably too low-level primitiives to be worth looking at |
| 06:57 | <astevanato> | Actually I don't know. I just want to collect something like info/debug information |
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| 06:58 | <astevanato> | damnt connection |
| 06:59 | <andyhhp> | you didn't miss anything |
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| 06:59 | <astevanato> | I was saying that I don't actually know what I'm looking at. Just general debug information that help me understand how things works. What happen from the pv driver on the guest till to the pv driver on the dom0 |
| 06:59 | <andyhhp> | but yeah - you don't want to go debug logging any of this |
| 07:00 | <andyhhp> | there's far too much data |
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| 07:00 | <astevanato> | xen should also act in between? |
| 07:00 | <andyhhp> | tbh, you're better off looking up various XenSummit presentations from the past |
| 07:00 | <andyhhp> | which have explainations how how this all works |
| 07:01 | <astevanato> | I've read https://wiki.xenproject.org/wiki/Xen_Networking but I think I need more details |
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| --- | Log | closed Wed Feb 09 00:00:05 2022 |