> Begin forwarded message:
>
> From: Maria Matejka <[email protected]>
> Subject: Re: segfault on running "show mem" command with bird-3.0alpha2
> Date: 26 February 2024 at 16:43:03 GMT
> To: Prem Anand <[email protected]>
> Cc: [email protected]
>
> Hello Prem,
> Could you please try out the current thread-next branch, i.e. this one?
> https://gitlab.nic.cz/labs/bird/-/tree/thread-next/ This is the development
> branch which will become 3.0alpha3 soon and if your report is still relevant
> for this branch, I'll try to fix it before releasing.
Hi Maria,
I don't see this segfault issue with thread-next branch. So I assume this got
fixed somewhere along the way :)
$ birdc -s ./bird.sock.ctl
BIRD v2.13.1-164-ge2728c80 ready.
bird> show mem
BIRD memory usage
Effective Overhead
Routing tables: 19.2 kB 1360.0 B
Route attributes: 816.0 B 5288.0 B
Protocols: 416.0 B 312.0 B
Current config: 8768.0 B 448.0 B
Standby memory: 0.0 B 60.0 kB
Total: 104.8 kB 71.6 kB
bird>
> It's really a pleasure to read that v3 is stable with 1K connections without
> major issues outside our testing setup. BTW in our testing setup, we managed
> to run it with 5K connections as well and I suppose we could handle at least
> 10K … just if I was't so lazy to setup larger tests. It's actually a good
> question how many connections we can handle at once. With v2, the
> architectural limitation occurs somewhere around 1.5K BGP connections, but
> with v3 and e.g. 32 threads, I would suppose that 40K connections should
> still be OK-ish. We should do such testing in future, just for fun, to find
> out how far we can stretch BIRD with the new internal architecture.
Good to know that we can got all the way upto 40K connections. That's really
impressive.
> Also, and especially if you are our happy user on such a large scale, please
> consider getting our BIRD Support Package to get exclusive services (config
> optimization, training, custom development …) and also to ensure continuous
> BIRD development in the future. See
> https://bird.nic.cz/en/commercial-services/ and/or send me an off-list e-mail
> to get a customized quote.
I am currently just evaluating TRex + Bird integration to fit into our
workflow. Once we decide to switch to use this in production, I would convince
my company to go up with a commercial service.
Regards
Prem
> Thank you for reporting.
> Have a nice day!
> Maria
> On 2024-02-26 16:45, Prem Anand wrote:
>> Hi All,
>> I am seeing this segfault with bird-3.0alpha2 on trying to run the "show
>> mem" command. Not sure if it is a known issue. Just thought of reporting it.
>>
>> By the way, bird-3.0 though in alpha, looks really stable. Was able to scale
>> upto 1K BGP Sessions without any major issues. Eagerly looking for a 3.0
>> stable release soon.
>>
>> Regards
>> Prem
>>
>> Thread 1 "bird" received signal SIGSEGV, Segmentation fault.
>> 0x00005555555841c3 in rmemsize (res=<optimized out>) at lib/resource.c:271
>> 271 if (!r->class->memsize)
>> (gdb) bt
>> #0 0x00005555555841c3 in rmemsize (res=<optimized out>) at lib/resource.c:271
>> #1 cmd_show_memory () at nest/cmds.c:122
>> #2 0x000055555560c03e in cf_parse.isra.0 () at nest/config.Y:640
>> #3 0x000055555556a523 in cli_parse (c=0x7fffffffd920) at conf/conf.c:179
>> #4 0x00005555555837fd in cli_command (c=c@entry=0x5555556bb338) at
>> nest/cli.c:273
>> #5 0x0000555555583b3c in cli_event (data=0x5555556bb338) at nest/cli.c:302
>> #6 0x00005555555786cb in ev_run_list_limited (l=0x555555681000
>> <global_event_list>, limit=4294967294) at lib/event.c:331
>> #7 0x0000555555566e14 in io_loop () at sysdep/unix/io.c:2216
>> #8 main (argc=<optimized out>, argv=<optimized out>) at
>> sysdep/unix/main.c:972
>> (gdb) f 1
>> #1 cmd_show_memory () at nest/cmds.c:122
>> 122 struct resmem total = rmemsize(&root_pool);
>> (gdb) print root_pool
>> $3 = {r = {n = {next = 0x0, prev = 0x0, list = 0x0}, class = 0x0}, inside =
>> {first = 0x555555685360, last = 0x5555556bb630}, domain = 0x555555680e40
>> <the_bird_domain_gen.lto_priv>, name = 0x555555656735 "Root"}
>> (gdb) print root_pool->r->class
>> $5 = (const struct resclass *) 0x0
>> (gdb)
>>
> --
> Maria Matejka (she/her) | BIRD Team Leader | CZ.NIC, z.s.p.o.
