Dummy test platform for registration testing

* Variable num_recvs (1..8) with variable sizes within each group. */

* Alternating uniform 256KB and variable sizes, always n=8. */

* Two recv groups with different tags, sends interleaved across groups. * Recv group 1: n=1, tag=8 * Recv group 2: n=8, tags=0-7 * Sends (in order)

* @brief Abstract base class representing a platform implementation for NCCL OFI plugin * * The Platform class provides an interface for platform-sp

================================================================ * Test 10: Grouped recv, no eager (large messages, regression) * ==================

================================================================ * Test 11: Eager queue ordering across single + grouped * 3 eager sends: offset 0 →

================================================================ * Test 12: Eager with tag mismatch pushback across two groups * Sends: tags [B, D,

================================================================ * Test 13: Eager queue full (8 messages) * ========================================

================================================================ * Test 14: Eager size boundary * ==================================================

================================================================ * Test 15: Two grouped recvs (n=4), all eager/write permutations * T0: eager/eager,

================================================================ * Test 16: 4x grouped(n=2) same tags, verify in-order per tag * Tags [X=70, Y=71] r

================================================================ * T17: Interleaved sends across two grouped recvs (all writes) * Two grouped recvs

================================================================ * T18: Interleaved sends across two grouped recvs (all eager) * Same interleaving a

================================================================ * T19: Interleaved sends, mixed eager+write within each group * Two grouped recvs (

================================================================ * T21: Three grouped recvs interleaved, same tags, different sizes * 3x grouped(n=2

================================================================ * T22: Heavy interleaving: 2x grouped(n=8), every other send from msg2 * Send order

================================================================ * T23: Eager spanning multiple grouped recvs * Rank 0 sends 12 small messages: tags

================================================================ * T24: Eager spanning single + grouped + single recvs * Rank 0 sends 6 small messag

* T5: Single recv eager (late recv) * Rank 0 sends 1 small (1024B) message with tag=1. * Rank 1 waits 10ms (so send goes eager), then posts single r

================================================================ * Test 6: Single recv eager — recv posted BEFORE send * ===========================

================================================================ * Test 7: Multiple sequential single-recv eager messages * ========================

================================================================ * Test 8: Grouped recv with all eager * ===========================================

================================================================ * Test 9: Grouped recv mixed eager + RDMA write * =================================

Test helper class to access protected constructor

Forward declaration

* Test registry for collecting test scenarios */

Test class to access protected methods

* Thread context structure for test scenarios */

* This class caches expensive one-time initialization (topology creation, * platform detection, env var parsing) to avoid repeated work. */

* A container class for various resources used by the CM code. This represents * the CM state, and is owned by the connection_manager class * * Imp

* An interface used by the CM code to allocate registered buffers to send and * receive connect messages * * Implemented using a nccl_ofi_freelist_

* Encapsulates a Libfabric endpoint for use with the CM * * Also encapsulates other OFI resources -- domain (from transport) * and av */