laforge has submitted this change. ( https://gerrit.osmocom.org/c/osmo-ttcn3-hacks/+/30374 )

Change subject: pcu: TC_paging_cs_from_sgsn_*: Fix race condition between BSSGP tx and RLCMAC rx ......................................................................

pcu: TC_paging_cs_from_sgsn_*: Fix race condition between BSSGP tx and RLCMAC rx

It can happen that the RLCMAC req arrives at osmo-pcu before the CS_PAGING we send to it over BSSGP, in which case osmo-pcu will schedule an RLCMAC DL Dummy Block. Take into account this scenario to avoid failing id it occurs.

Change-Id: I30da93835c7738aefcd84691d83f39759dd4b599 --- M pcu/PCU_Tests.ttcn 1 file changed, 10 insertions(+), 2 deletions(-)

Approvals: Jenkins Builder: Verified fixeria: Looks good to me, approved

diff --git a/pcu/PCU_Tests.ttcn b/pcu/PCU_Tests.ttcn index 4b909c7..876b282 100644 --- a/pcu/PCU_Tests.ttcn +++ b/pcu/PCU_Tests.ttcn @@ -3627,8 +3627,16 @@ BSSGP[0].send(ts_BSSGP_CS_PAGING_IMSI(bvci, imsi)); }

- /* Receive it on BTS side towards MS */ - f_rx_rlcmac_dl_block_exp_pkt_pag_req(dl_block); + /* Now receive it on BTS side towards MS. + * Skip any dummy blocks in case the PCUIF req arrives before the BSSP CS_PAGING: + */ + f_rx_rlcmac_dl_block_skip_dummy(dl_block, max_dummy := 10); + + if (not match(dl_block, tr_RLCMAC_PACKET_PAG_REQ())) { + setverdict(fail, "Failed to match Packet Paging Request: ", + dl_block, " vs ", tr_RLCMAC_PACKET_PAG_REQ()); + f_shutdown(__BFILE__, __LINE__); + }

/* Make sure that Packet Paging Request contains the same P-TMSI/IMSI */ var PacketPagingReq req := dl_block.ctrl.payload.u.paging;