From 9af57b7a2702f2cdf6ae499612e90b0f84bcb393 Mon Sep 17 00:00:00 2001 From: Sean Hefty Date: Mon, 16 Jul 2007 21:49:35 -0700 Subject: [PATCH] IB/cm: Add basic performance counters Add performance/debug counters to track sent/received messages, retries, and duplicates. Counters are tracked per CM message type, per port. The counters are always enabled, so intrusive state tracking is not done. Signed-off-by: Sean Hefty Signed-off-by: Roland Dreier --- drivers/infiniband/core/cm.c | 306 ++++++++++++++++++++++++++++++++-- drivers/infiniband/core/ucm.c | 37 ++-- 2 files changed, 303 insertions(+), 40 deletions(-) diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c index 2e39236d189f..c0150147d347 100644 --- a/drivers/infiniband/core/cm.c +++ b/drivers/infiniband/core/cm.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2004-2006 Intel Corporation. All rights reserved. + * Copyright (c) 2004-2007 Intel Corporation. All rights reserved. * Copyright (c) 2004 Topspin Corporation. All rights reserved. * Copyright (c) 2004, 2005 Voltaire Corporation. All rights reserved. * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. @@ -37,12 +37,14 @@ #include #include +#include #include #include #include #include #include #include +#include #include #include @@ -78,17 +80,94 @@ static struct ib_cm { struct workqueue_struct *wq; } cm; +/* Counter indexes ordered by attribute ID */ +enum { + CM_REQ_COUNTER, + CM_MRA_COUNTER, + CM_REJ_COUNTER, + CM_REP_COUNTER, + CM_RTU_COUNTER, + CM_DREQ_COUNTER, + CM_DREP_COUNTER, + CM_SIDR_REQ_COUNTER, + CM_SIDR_REP_COUNTER, + CM_LAP_COUNTER, + CM_APR_COUNTER, + CM_ATTR_COUNT, + CM_ATTR_ID_OFFSET = 0x0010, +}; + +enum { + CM_XMIT, + CM_XMIT_RETRIES, + CM_RECV, + CM_RECV_DUPLICATES, + CM_COUNTER_GROUPS +}; + +static char const counter_group_names[CM_COUNTER_GROUPS] + [sizeof("cm_rx_duplicates")] = { + "cm_tx_msgs", "cm_tx_retries", + "cm_rx_msgs", "cm_rx_duplicates" +}; + +struct cm_counter_group { + struct kobject obj; + atomic_long_t counter[CM_ATTR_COUNT]; +}; + +struct cm_counter_attribute { + struct attribute attr; + int index; +}; + +#define CM_COUNTER_ATTR(_name, _index) \ +struct cm_counter_attribute cm_##_name##_counter_attr = { \ + .attr = { .name = __stringify(_name), .mode = 0444, .owner = THIS_MODULE }, \ + .index = _index \ +} + +static CM_COUNTER_ATTR(req, CM_REQ_COUNTER); +static CM_COUNTER_ATTR(mra, CM_MRA_COUNTER); +static CM_COUNTER_ATTR(rej, CM_REJ_COUNTER); +static CM_COUNTER_ATTR(rep, CM_REP_COUNTER); +static CM_COUNTER_ATTR(rtu, CM_RTU_COUNTER); +static CM_COUNTER_ATTR(dreq, CM_DREQ_COUNTER); +static CM_COUNTER_ATTR(drep, CM_DREP_COUNTER); +static CM_COUNTER_ATTR(sidr_req, CM_SIDR_REQ_COUNTER); +static CM_COUNTER_ATTR(sidr_rep, CM_SIDR_REP_COUNTER); +static CM_COUNTER_ATTR(lap, CM_LAP_COUNTER); +static CM_COUNTER_ATTR(apr, CM_APR_COUNTER); + +static struct attribute *cm_counter_default_attrs[] = { + &cm_req_counter_attr.attr, + &cm_mra_counter_attr.attr, + &cm_rej_counter_attr.attr, + &cm_rep_counter_attr.attr, + &cm_rtu_counter_attr.attr, + &cm_dreq_counter_attr.attr, + &cm_drep_counter_attr.attr, + &cm_sidr_req_counter_attr.attr, + &cm_sidr_rep_counter_attr.attr, + &cm_lap_counter_attr.attr, + &cm_apr_counter_attr.attr, + NULL +}; + struct cm_port { struct cm_device *cm_dev; struct ib_mad_agent *mad_agent; + struct kobject port_obj; u8 port_num; + struct cm_counter_group counter_group[CM_COUNTER_GROUPS]; }; struct cm_device { struct list_head list; struct ib_device *device; + struct kobject dev_obj; u8 ack_delay; - struct cm_port port[0]; + struct cm_port *port[0]; }; struct cm_av { @@ -278,7 +357,7 @@ static int cm_init_av_by_path(struct ib_sa_path_rec *path, struct cm_av *av) list_for_each_entry(cm_dev, &cm.device_list, list) { if (!ib_find_cached_gid(cm_dev->device, &path->sgid, &p, NULL)) { - port = &cm_dev->port[p-1]; + port = cm_dev->port[p-1]; break; } } @@ -1270,6 +1349,9 @@ static void cm_dup_req_handler(struct cm_work *work, struct ib_mad_send_buf *msg = NULL; int ret; + atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. + counter[CM_REQ_COUNTER]); + /* Quick state check to discard duplicate REQs. */ if (cm_id_priv->id.state == IB_CM_REQ_RCVD) return; @@ -1616,6 +1698,8 @@ static void cm_dup_rep_handler(struct cm_work *work) if (!cm_id_priv) return; + atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. + counter[CM_REP_COUNTER]); ret = cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg); if (ret) goto deref; @@ -1781,6 +1865,8 @@ static int cm_rtu_handler(struct cm_work *work) if (cm_id_priv->id.state != IB_CM_REP_SENT && cm_id_priv->id.state != IB_CM_MRA_REP_RCVD) { spin_unlock_irq(&cm_id_priv->lock); + atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. + counter[CM_RTU_COUNTER]); goto out; } cm_id_priv->id.state = IB_CM_ESTABLISHED; @@ -1958,6 +2044,8 @@ static int cm_dreq_handler(struct cm_work *work) cm_id_priv = cm_acquire_id(dreq_msg->remote_comm_id, dreq_msg->local_comm_id); if (!cm_id_priv) { + atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. + counter[CM_DREQ_COUNTER]); cm_issue_drep(work->port, work->mad_recv_wc); return -EINVAL; } @@ -1977,6 +2065,8 @@ static int cm_dreq_handler(struct cm_work *work) case IB_CM_MRA_REP_RCVD: break; case IB_CM_TIMEWAIT: + atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. + counter[CM_DREQ_COUNTER]); if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) goto unlock; @@ -1988,6 +2078,10 @@ static int cm_dreq_handler(struct cm_work *work) if (ib_post_send_mad(msg, NULL)) cm_free_msg(msg); goto deref; + case IB_CM_DREQ_RCVD: + atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. + counter[CM_DREQ_COUNTER]); + goto unlock; default: goto unlock; } @@ -2339,10 +2433,20 @@ static int cm_mra_handler(struct cm_work *work) if (cm_mra_get_msg_mraed(mra_msg) != CM_MSG_RESPONSE_OTHER || cm_id_priv->id.lap_state != IB_CM_LAP_SENT || ib_modify_mad(cm_id_priv->av.port->mad_agent, - cm_id_priv->msg, timeout)) + cm_id_priv->msg, timeout)) { + if (cm_id_priv->id.lap_state == IB_CM_MRA_LAP_RCVD) + atomic_long_inc(&work->port-> + counter_group[CM_RECV_DUPLICATES]. + counter[CM_MRA_COUNTER]); goto out; + } cm_id_priv->id.lap_state = IB_CM_MRA_LAP_RCVD; break; + case IB_CM_MRA_REQ_RCVD: + case IB_CM_MRA_REP_RCVD: + atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. + counter[CM_MRA_COUNTER]); + /* fall through */ default: goto out; } @@ -2502,6 +2606,8 @@ static int cm_lap_handler(struct cm_work *work) case IB_CM_LAP_IDLE: break; case IB_CM_MRA_LAP_SENT: + atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. + counter[CM_LAP_COUNTER]); if (cm_alloc_response_msg(work->port, work->mad_recv_wc, &msg)) goto unlock; @@ -2515,6 +2621,10 @@ static int cm_lap_handler(struct cm_work *work) if (ib_post_send_mad(msg, NULL)) cm_free_msg(msg); goto deref; + case IB_CM_LAP_RCVD: + atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. + counter[CM_LAP_COUNTER]); + goto unlock; default: goto unlock; } @@ -2796,6 +2906,8 @@ static int cm_sidr_req_handler(struct cm_work *work) cur_cm_id_priv = cm_insert_remote_sidr(cm_id_priv); if (cur_cm_id_priv) { spin_unlock_irq(&cm.lock); + atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES]. + counter[CM_SIDR_REQ_COUNTER]); goto out; /* Duplicate message. */ } cm_id_priv->id.state = IB_CM_SIDR_REQ_RCVD; @@ -2990,6 +3102,27 @@ static void cm_send_handler(struct ib_mad_agent *mad_agent, struct ib_mad_send_wc *mad_send_wc) { struct ib_mad_send_buf *msg = mad_send_wc->send_buf; + struct cm_port *port; + u16 attr_index; + + port = mad_agent->context; + attr_index = be16_to_cpu(((struct ib_mad_hdr *) + msg->mad)->attr_id) - CM_ATTR_ID_OFFSET; + + /* + * If the send was in response to a received message (context[0] is not + * set to a cm_id), and is not a REJ, then it is a send that was + * manually retried. + */ + if (!msg->context[0] && (attr_index != CM_REJ_COUNTER)) + msg->retries = 1; + + atomic_long_add(1 + msg->retries, + &port->counter_group[CM_XMIT].counter[attr_index]); + if (msg->retries) + atomic_long_add(msg->retries, + &port->counter_group[CM_XMIT_RETRIES]. + counter[attr_index]); switch (mad_send_wc->status) { case IB_WC_SUCCESS: @@ -3148,8 +3281,10 @@ EXPORT_SYMBOL(ib_cm_notify); static void cm_recv_handler(struct ib_mad_agent *mad_agent, struct ib_mad_recv_wc *mad_recv_wc) { + struct cm_port *port = mad_agent->context; struct cm_work *work; enum ib_cm_event_type event; + u16 attr_id; int paths = 0; switch (mad_recv_wc->recv_buf.mad->mad_hdr.attr_id) { @@ -3194,6 +3329,10 @@ static void cm_recv_handler(struct ib_mad_agent *mad_agent, return; } + attr_id = be16_to_cpu(mad_recv_wc->recv_buf.mad->mad_hdr.attr_id); + atomic_long_inc(&port->counter_group[CM_RECV]. + counter[attr_id - CM_ATTR_ID_OFFSET]); + work = kmalloc(sizeof *work + sizeof(struct ib_sa_path_rec) * paths, GFP_KERNEL); if (!work) { @@ -3204,7 +3343,7 @@ static void cm_recv_handler(struct ib_mad_agent *mad_agent, INIT_DELAYED_WORK(&work->work, cm_work_handler); work->cm_event.event = event; work->mad_recv_wc = mad_recv_wc; - work->port = (struct cm_port *)mad_agent->context; + work->port = port; queue_delayed_work(cm.wq, &work->work, 0); } @@ -3379,6 +3518,108 @@ static void cm_get_ack_delay(struct cm_device *cm_dev) cm_dev->ack_delay = attr.local_ca_ack_delay; } +static ssize_t cm_show_counter(struct kobject *obj, struct attribute *attr, + char *buf) +{ + struct cm_counter_group *group; + struct cm_counter_attribute *cm_attr; + + group = container_of(obj, struct cm_counter_group, obj); + cm_attr = container_of(attr, struct cm_counter_attribute, attr); + + return sprintf(buf, "%ld\n", + atomic_long_read(&group->counter[cm_attr->index])); +} + +static struct sysfs_ops cm_counter_ops = { + .show = cm_show_counter +}; + +static struct kobj_type cm_counter_obj_type = { + .sysfs_ops = &cm_counter_ops, + .default_attrs = cm_counter_default_attrs +}; + +static void cm_release_port_obj(struct kobject *obj) +{ + struct cm_port *cm_port; + + printk(KERN_ERR "free cm port\n"); + + cm_port = container_of(obj, struct cm_port, port_obj); + kfree(cm_port); +} + +static struct kobj_type cm_port_obj_type = { + .release = cm_release_port_obj +}; + +static void cm_release_dev_obj(struct kobject *obj) +{ + struct cm_device *cm_dev; + + printk(KERN_ERR "free cm dev\n"); + + cm_dev = container_of(obj, struct cm_device, dev_obj); + kfree(cm_dev); +} + +static struct kobj_type cm_dev_obj_type = { + .release = cm_release_dev_obj +}; + +struct class cm_class = { + .name = "infiniband_cm", +}; +EXPORT_SYMBOL(cm_class); + +static void cm_remove_fs_obj(struct kobject *obj) +{ + kobject_put(obj->parent); + kobject_put(obj); +} + +static int cm_create_port_fs(struct cm_port *port) +{ + int i, ret; + + ret = kobject_init_and_add(&port->port_obj, &cm_port_obj_type, + kobject_get(&port->cm_dev->dev_obj), + "%d", port->port_num); + if (ret) { + kfree(port); + return ret; + } + + for (i = 0; i < CM_COUNTER_GROUPS; i++) { + ret = kobject_init_and_add(&port->counter_group[i].obj, + &cm_counter_obj_type, + kobject_get(&port->port_obj), + "%s", counter_group_names[i]); + if (ret) + goto error; + } + + return 0; + +error: + while (i--) + cm_remove_fs_obj(&port->counter_group[i].obj); + cm_remove_fs_obj(&port->port_obj); + return ret; + +} + +static void cm_remove_port_fs(struct cm_port *port) +{ + int i; + + for (i = 0; i < CM_COUNTER_GROUPS; i++) + cm_remove_fs_obj(&port->counter_group[i].obj); + + cm_remove_fs_obj(&port->port_obj); +} + static void cm_add_one(struct ib_device *device) { struct cm_device *cm_dev; @@ -3397,7 +3638,7 @@ static void cm_add_one(struct ib_device *device) if (rdma_node_get_transport(device->node_type) != RDMA_TRANSPORT_IB) return; - cm_dev = kmalloc(sizeof(*cm_dev) + sizeof(*port) * + cm_dev = kzalloc(sizeof(*cm_dev) + sizeof(*port) * device->phys_port_cnt, GFP_KERNEL); if (!cm_dev) return; @@ -3405,11 +3646,27 @@ static void cm_add_one(struct ib_device *device) cm_dev->device = device; cm_get_ack_delay(cm_dev); + ret = kobject_init_and_add(&cm_dev->dev_obj, &cm_dev_obj_type, + &cm_class.subsys.kobj, "%s", device->name); + if (ret) { + kfree(cm_dev); + return; + } + set_bit(IB_MGMT_METHOD_SEND, reg_req.method_mask); for (i = 1; i <= device->phys_port_cnt; i++) { - port = &cm_dev->port[i-1]; + port = kzalloc(sizeof *port, GFP_KERNEL); + if (!port) + goto error1; + + cm_dev->port[i-1] = port; port->cm_dev = cm_dev; port->port_num = i; + + ret = cm_create_port_fs(port); + if (ret) + goto error1; + port->mad_agent = ib_register_mad_agent(device, i, IB_QPT_GSI, ®_req, @@ -3418,11 +3675,11 @@ static void cm_add_one(struct ib_device *device) cm_recv_handler, port); if (IS_ERR(port->mad_agent)) - goto error1; + goto error2; ret = ib_modify_port(device, i, 0, &port_modify); if (ret) - goto error2; + goto error3; } ib_set_client_data(device, &cm_client, cm_dev); @@ -3431,17 +3688,20 @@ static void cm_add_one(struct ib_device *device) write_unlock_irqrestore(&cm.device_lock, flags); return; -error2: +error3: ib_unregister_mad_agent(port->mad_agent); +error2: + cm_remove_port_fs(port); error1: port_modify.set_port_cap_mask = 0; port_modify.clr_port_cap_mask = IB_PORT_CM_SUP; while (--i) { - port = &cm_dev->port[i-1]; + port = cm_dev->port[i-1]; ib_modify_port(device, port->port_num, 0, &port_modify); ib_unregister_mad_agent(port->mad_agent); + cm_remove_port_fs(port); } - kfree(cm_dev); + cm_remove_fs_obj(&cm_dev->dev_obj); } static void cm_remove_one(struct ib_device *device) @@ -3463,11 +3723,12 @@ static void cm_remove_one(struct ib_device *device) write_unlock_irqrestore(&cm.device_lock, flags); for (i = 1; i <= device->phys_port_cnt; i++) { - port = &cm_dev->port[i-1]; + port = cm_dev->port[i-1]; ib_modify_port(device, port->port_num, 0, &port_modify); ib_unregister_mad_agent(port->mad_agent); + cm_remove_port_fs(port); } - kfree(cm_dev); + cm_remove_fs_obj(&cm_dev->dev_obj); } static int __init ib_cm_init(void) @@ -3488,17 +3749,25 @@ static int __init ib_cm_init(void) idr_pre_get(&cm.local_id_table, GFP_KERNEL); INIT_LIST_HEAD(&cm.timewait_list); - cm.wq = create_workqueue("ib_cm"); - if (!cm.wq) + ret = class_register(&cm_class); + if (ret) return -ENOMEM; + cm.wq = create_workqueue("ib_cm"); + if (!cm.wq) { + ret = -ENOMEM; + goto error1; + } + ret = ib_register_client(&cm_client); if (ret) - goto error; + goto error2; return 0; -error: +error2: destroy_workqueue(cm.wq); +error1: + class_unregister(&cm_class); return ret; } @@ -3519,6 +3788,7 @@ static void __exit ib_cm_cleanup(void) } ib_unregister_client(&cm_client); + class_unregister(&cm_class); idr_destroy(&cm.local_id_table); } diff --git a/drivers/infiniband/core/ucm.c b/drivers/infiniband/core/ucm.c index 424983f5b1ee..4291ab42a5b9 100644 --- a/drivers/infiniband/core/ucm.c +++ b/drivers/infiniband/core/ucm.c @@ -106,6 +106,9 @@ enum { IB_UCM_MAX_DEVICES = 32 }; +/* ib_cm and ib_user_cm modules share /sys/class/infiniband_cm */ +extern struct class cm_class; + #define IB_UCM_BASE_DEV MKDEV(IB_UCM_MAJOR, IB_UCM_BASE_MINOR) static void ib_ucm_add_one(struct ib_device *device); @@ -1199,7 +1202,7 @@ static int ib_ucm_close(struct inode *inode, struct file *filp) return 0; } -static void ib_ucm_release_class_dev(struct class_device *class_dev) +static void ucm_release_class_dev(struct class_device *class_dev) { struct ib_ucm_device *dev; @@ -1217,11 +1220,6 @@ static const struct file_operations ucm_fops = { .poll = ib_ucm_poll, }; -static struct class ucm_class = { - .name = "infiniband_cm", - .release = ib_ucm_release_class_dev -}; - static ssize_t show_ibdev(struct class_device *class_dev, char *buf) { struct ib_ucm_device *dev; @@ -1257,9 +1255,10 @@ static void ib_ucm_add_one(struct ib_device *device) if (cdev_add(&ucm_dev->dev, IB_UCM_BASE_DEV + ucm_dev->devnum, 1)) goto err; - ucm_dev->class_dev.class = &ucm_class; + ucm_dev->class_dev.class = &cm_class; ucm_dev->class_dev.dev = device->dma_device; ucm_dev->class_dev.devt = ucm_dev->dev.dev; + ucm_dev->class_dev.release = ucm_release_class_dev; snprintf(ucm_dev->class_dev.class_id, BUS_ID_SIZE, "ucm%d", ucm_dev->devnum); if (class_device_register(&ucm_dev->class_dev)) @@ -1306,40 +1305,34 @@ static int __init ib_ucm_init(void) "infiniband_cm"); if (ret) { printk(KERN_ERR "ucm: couldn't register device number\n"); - goto err; + goto error1; } - ret = class_register(&ucm_class); - if (ret) { - printk(KERN_ERR "ucm: couldn't create class infiniband_cm\n"); - goto err_chrdev; - } - - ret = class_create_file(&ucm_class, &class_attr_abi_version); + ret = class_create_file(&cm_class, &class_attr_abi_version); if (ret) { printk(KERN_ERR "ucm: couldn't create abi_version attribute\n"); - goto err_class; + goto error2; } ret = ib_register_client(&ucm_client); if (ret) { printk(KERN_ERR "ucm: couldn't register client\n"); - goto err_class; + goto error3; } return 0; -err_class: - class_unregister(&ucm_class); -err_chrdev: +error3: + class_remove_file(&cm_class, &class_attr_abi_version); +error2: unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); -err: +error1: return ret; } static void __exit ib_ucm_cleanup(void) { ib_unregister_client(&ucm_client); - class_unregister(&ucm_class); + class_remove_file(&cm_class, &class_attr_abi_version); unregister_chrdev_region(IB_UCM_BASE_DEV, IB_UCM_MAX_DEVICES); idr_destroy(&ctx_id_table); } -- 2.20.1