88f51fbb8e
This commit updates the btl interface to change the parameters passed to receive callbacks. The interface used to pass the tag, a btl base descriptor, and the callback context. Most of the values in the btl base descriptor were unused and only helped simplify the callbacks from the self btl. All of the arguments have now been replaced with a single receive callback descriptor. This descriptor contains the incoming endpoint, data segment(s), tag, and callback context. All btls have been updated to use the new callback and the btl interface version has been bumped to v3.2.0. As part of this change the descriptor argument (and the segments contained within it) have been marked as const. The were treated as const before but this change could allow the compiler to make better optimization decisions and will enforce that the callback does not attempt to change the data in the descriptor. Signed-off-by: Nathan Hjelm <hjelmn@google.com>
243 строки
8.2 KiB
C
243 строки
8.2 KiB
C
/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */
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/*
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* Copyright (c) 2011-2017 Los Alamos National Security, LLC. All rights
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* reserved.
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* Copyright (c) 2011 UT-Battelle, LLC. All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "btl_ugni_smsg.h"
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#include "btl_ugni_rdma.h"
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static void mca_btl_ugni_smsg_mbox_construct (mca_btl_ugni_smsg_mbox_t *mbox) {
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struct mca_btl_ugni_reg_t *ugni_reg =
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(struct mca_btl_ugni_reg_t *) mbox->super.registration;
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mca_rcache_base_registration_t *base_reg =
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(mca_rcache_base_registration_t *) ugni_reg;
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/* initialize mailbox attributes */
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mbox->attr.smsg_attr.msg_type = GNI_SMSG_TYPE_MBOX_AUTO_RETRANSMIT;
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mbox->attr.smsg_attr.msg_maxsize = mca_btl_ugni_component.ugni_smsg_limit;
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mbox->attr.smsg_attr.mbox_maxcredit = mca_btl_ugni_component.smsg_max_credits;
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mbox->attr.smsg_attr.mbox_offset = (uintptr_t) mbox->super.ptr - (uintptr_t) base_reg->base;
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mbox->attr.smsg_attr.msg_buffer = base_reg->base;
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mbox->attr.smsg_attr.buff_size = mca_btl_ugni_component.smsg_mbox_size;
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mbox->attr.smsg_attr.mem_hndl = ugni_reg->handle.gni_handle;
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mbox->attr.proc_name = OPAL_PROC_MY_NAME;
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mbox->attr.rmt_irq_mem_hndl = mca_btl_ugni_component.modules[0].devices[0].smsg_irq_mhndl;
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}
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OBJ_CLASS_INSTANCE(mca_btl_ugni_smsg_mbox_t, opal_free_list_item_t,
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mca_btl_ugni_smsg_mbox_construct, NULL);
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int mca_btl_ugni_smsg_init (mca_btl_ugni_module_t *ugni_module)
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{
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gni_return_t rc;
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for (int i = 0 ; i < mca_btl_ugni_component.virtual_device_count ; ++i) {
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rc = GNI_SmsgSetMaxRetrans (ugni_module->devices[i].dev_handle,
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mca_btl_ugni_component.smsg_max_retries);
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if (GNI_RC_SUCCESS != rc) {
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BTL_ERROR(("error setting maximum SMSG retries %s",gni_err_str[rc]));
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return mca_btl_rc_ugni_to_opal (rc);
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}
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}
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return OPAL_SUCCESS;
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}
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/* progress */
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int mca_btl_ugni_smsg_process (mca_btl_base_endpoint_t *ep)
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{
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mca_btl_ugni_module_t *ugni_module = mca_btl_ugni_ep_btl (ep);
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mca_btl_active_message_callback_t *reg;
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mca_btl_ugni_base_frag_t frag;
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bool disconnect = false;
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int32_t _tmp_value = 0;
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uintptr_t data_ptr;
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gni_return_t rc;
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uint32_t len;
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int count = 0;
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if (!opal_atomic_compare_exchange_strong_32 (&ep->smsg_progressing, &_tmp_value, 1)) {
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/* already progressing (we can't support reentry here) */
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return 0;
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}
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/* per uGNI documentation we loop until the mailbox is empty */
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do {
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uint8_t tag = GNI_SMSG_ANY_TAG;
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rc = mca_btl_ugni_smsg_get_next_wtag (&ep->smsg_ep_handle, &data_ptr, &tag);
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if (GNI_RC_SUCCESS != rc) {
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if (OPAL_LIKELY(GNI_RC_NOT_DONE == rc)) {
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BTL_VERBOSE(("no smsg message waiting. rc = %s", gni_err_str[rc]));
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ep->smsg_progressing = 0;
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return count;
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}
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BTL_ERROR(("unhandled GNI_SmsgGetNextWTag error"));
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return OPAL_ERROR;
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}
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assert (0 != data_ptr);
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count++;
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BTL_VERBOSE(("got smsg fragment. tag = %d\n", tag));
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switch (tag) {
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case MCA_BTL_UGNI_TAG_SEND:
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frag.hdr.send = ((mca_btl_ugni_send_frag_hdr_t *) data_ptr)[0];
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tag = frag.hdr.send.lag >> 24;
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len = frag.hdr.send.lag & 0x00ffffff;
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BTL_VERBOSE(("received smsg fragment. hdr = {len = %u, tag = %d}", len, tag));
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reg = mca_btl_base_active_message_trigger + tag;
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mca_btl_base_segment_t seg =
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{.seg_addr.pval = (void *)((uintptr_t)data_ptr + sizeof (mca_btl_ugni_send_frag_hdr_t)),
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seg.seg_len = len};
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const mca_btl_base_receive_descriptor_t desc = {.endpoint = ep, .des_segments = &seg,
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.des_segment_count = 1, .tag = tag,
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.cbdata = reg->cbdata};
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reg->cbfunc(&ugni_module->super, &desc);
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break;
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case MCA_BTL_UGNI_TAG_GET_INIT:
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frag.hdr.eager_ex = ((mca_btl_ugni_eager_ex_frag_hdr_t *) data_ptr)[0];
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mca_btl_ugni_start_eager_get (ep, frag.hdr.eager_ex, NULL);
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break;
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case MCA_BTL_UGNI_TAG_RDMA_COMPLETE:
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frag.hdr.rdma = ((mca_btl_ugni_rdma_frag_hdr_t *) data_ptr)[0];
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if (((mca_btl_ugni_base_frag_t *)frag.hdr.rdma.ctx)->flags & MCA_BTL_UGNI_FRAG_SMSG_COMPLETE) {
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mca_btl_ugni_frag_complete (frag.hdr.rdma.ctx, OPAL_SUCCESS);
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} else {
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/* let the local smsg completion finish this frag */
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((mca_btl_ugni_base_frag_t *)frag.hdr.rdma.ctx)->flags &= ~MCA_BTL_UGNI_FRAG_IGNORE;
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}
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break;
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case MCA_BTL_UGNI_TAG_DISCONNECT:
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/* remote endpoint has disconnected */
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disconnect = true;
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break;
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default:
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BTL_ERROR(("unknown tag %d\n", tag));
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break;
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}
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rc = mca_btl_ugni_smsg_release (&ep->smsg_ep_handle);
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if (OPAL_UNLIKELY(GNI_RC_SUCCESS != rc)) {
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BTL_ERROR(("Smsg release failed! rc = %d", rc));
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return OPAL_ERROR;
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}
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} while (!disconnect);
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ep->smsg_progressing = 0;
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/* disconnect if we get here */
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opal_mutex_lock (&ep->lock);
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mca_btl_ugni_ep_disconnect (ep, false);
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opal_mutex_unlock (&ep->lock);
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return count;
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}
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static inline int
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mca_btl_ugni_handle_remote_smsg_overrun (mca_btl_ugni_module_t *btl)
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{
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size_t endpoint_count;
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unsigned int ep_index;
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int count, rc;
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BTL_VERBOSE(("btl/ugni_component detected SMSG CQ overrun. "
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"processing message backlog..."));
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/* we don't know which endpoint lost an smsg completion. clear the
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smsg remote cq and check all mailboxes */
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/* clear out remote cq */
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mca_btl_ugni_cq_clear (btl->devices, btl->smsg_remote_cq);
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endpoint_count = opal_pointer_array_get_size (&btl->endpoints);
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for (ep_index = 0, count = 0 ; ep_index < endpoint_count ; ++ep_index) {
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mca_btl_base_endpoint_t *ep;
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ep = (mca_btl_base_endpoint_t *) opal_pointer_array_get_item (&btl->endpoints,
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ep_index);
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if (NULL == ep || MCA_BTL_UGNI_EP_STATE_CONNECTED != ep->state) {
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continue;
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}
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/* clear out smsg mailbox */
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rc = mca_btl_ugni_smsg_process (ep);
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if (OPAL_LIKELY(rc >= 0)) {
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count += rc;
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}
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}
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return count;
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}
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int mca_btl_ugni_progress_remote_smsg (mca_btl_ugni_module_t *btl)
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{
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mca_btl_base_endpoint_t *ep;
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gni_cq_entry_t event_data;
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gni_return_t grc;
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uint64_t inst_id;
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grc = mca_btl_ugni_gni_cq_get_event (btl->devices, btl->smsg_remote_cq, &event_data);
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if (GNI_RC_NOT_DONE == grc) {
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return 0;
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}
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if (OPAL_UNLIKELY(GNI_RC_SUCCESS != grc || !GNI_CQ_STATUS_OK(event_data) ||
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GNI_CQ_OVERRUN(event_data))) {
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if (GNI_RC_ERROR_RESOURCE == grc ||
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(GNI_RC_SUCCESS == grc && GNI_CQ_OVERRUN(event_data))) {
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/* recover from smsg cq overrun */
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return mca_btl_ugni_handle_remote_smsg_overrun (btl);
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}
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BTL_ERROR(("unhandled error in GNI_CqGetEvent"));
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/* unhandled error: crash */
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assert (0);
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return mca_btl_rc_ugni_to_opal (grc);
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}
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BTL_VERBOSE(("REMOTE CQ: Got event 0x%" PRIx64 ". msg id = %" PRIu64
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". ok = %d, type = %" PRIu64, (uint64_t) event_data,
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GNI_CQ_GET_INST_ID(event_data), GNI_CQ_STATUS_OK(event_data),
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GNI_CQ_GET_TYPE(event_data)));
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inst_id = GNI_CQ_GET_INST_ID(event_data);
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ep = (mca_btl_base_endpoint_t *) opal_pointer_array_get_item (&btl->endpoints, inst_id);
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if (OPAL_UNLIKELY(MCA_BTL_UGNI_EP_STATE_CONNECTED != ep->state)) {
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/* due to the nature of datagrams we may get a smsg completion before
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we get mailbox info from the peer */
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BTL_VERBOSE(("event occurred on an unconnected endpoint! ep state = %d", ep->state));
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return 0;
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}
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return mca_btl_ugni_smsg_process (ep);
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}
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