Hi Neels,

On Wed, Jun 29, 2016 at 06:10:51PM +0200, Neels Hofmeyr wrote:

I notice that apparently osmo-bts-trx is the only caller of the trx_sched_* API, yet it is implemented in common/scheduler.c and compiled to libl1sched.a. Is osmo-bts-trx really the only caller?

Yes.

Also in osmo-bts-trx, the "trx" to me means SDR, like B200. But any BTS has one or more TRXs. So why isn't it osmo-bts-sdr?

In osmo-bts-trx, "TRX" means "A program behaving like an OpenBTS tranceiver and implementing the UDP based protocol of that", where the preferred implementation used by most people with osmo-bts-trx is probably "osmo-trx". It should probably still work with the original OpenBTS TRX or with the one from yateBTS. Note that all of this is a threoretical statement, I haven't used either of those configurations.

That's why I thought: maybe trx_sched_ is for all BTS models?

It's always useful to look at a call graph.

Thanks for any clarification / confirmation :)

simply look at the git log. commit 5538f5cff824f19d5dc8781cbb93525ad45ad833 and those following explain what was done and why it was done. The most important user I care about is osmo-bts-virtual, which also needs all the L1 scheduling parts.