Date: Wed, 26 Dec 2018 10:35:41 +0000 (UTC) From: Andrew Rybchenko <arybchik@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r342523 - stable/10/sys/dev/sfxge Message-ID: <201812261035.wBQAZfen035011@repo.freebsd.org>
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Author: arybchik Date: Wed Dec 26 10:35:41 2018 New Revision: 342523 URL: https://svnweb.freebsd.org/changeset/base/342523 Log: MFC r341782 sfxge(4): populate per-event queue stats in sysctl In order to find out why the first event queue and corresponding interrupt is triggered more frequent, it is useful to know which events go to each event queue. Sponsored by: Solarflare Communications, Inc. Differential Revision: https://reviews.freebsd.org/D18418 Modified: stable/10/sys/dev/sfxge/sfxge.h stable/10/sys/dev/sfxge/sfxge_ev.c Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/sfxge/sfxge.h ============================================================================== --- stable/10/sys/dev/sfxge/sfxge.h Wed Dec 26 10:28:43 2018 (r342522) +++ stable/10/sys/dev/sfxge/sfxge.h Wed Dec 26 10:35:41 2018 (r342523) @@ -181,6 +181,10 @@ struct sfxge_evq { unsigned int buf_base_id; unsigned int entries; char lock_name[SFXGE_LOCK_NAME_MAX]; +#if EFSYS_OPT_QSTATS + clock_t stats_update_time; + uint64_t stats[EV_NQSTATS]; +#endif } __aligned(CACHE_LINE_SIZE); #define SFXGE_NDESCS 1024 @@ -272,6 +276,9 @@ struct sfxge_softc { struct ifnet *ifnet; unsigned int if_flags; struct sysctl_oid *stats_node; +#if EFSYS_OPT_QSTATS + struct sysctl_oid *evqs_stats_node; +#endif struct sysctl_oid *txqs_node; struct task task_reset; Modified: stable/10/sys/dev/sfxge/sfxge_ev.c ============================================================================== --- stable/10/sys/dev/sfxge/sfxge_ev.c Wed Dec 26 10:28:43 2018 (r342522) +++ stable/10/sys/dev/sfxge/sfxge_ev.c Wed Dec 26 10:35:41 2018 (r342523) @@ -436,29 +436,94 @@ sfxge_ev_wake_up(void *arg, uint32_t index) #if EFSYS_OPT_QSTATS static void +sfxge_evq_stat_update(struct sfxge_evq *evq) +{ + clock_t now; + + SFXGE_EVQ_LOCK(evq); + + if (__predict_false(evq->init_state != SFXGE_EVQ_STARTED)) + goto out; + + now = ticks; + if ((unsigned int)(now - evq->stats_update_time) < (unsigned int)hz) + goto out; + + evq->stats_update_time = now; + efx_ev_qstats_update(evq->common, evq->stats); + +out: + SFXGE_EVQ_UNLOCK(evq); +} + +static int +sfxge_evq_stat_handler(SYSCTL_HANDLER_ARGS) +{ + struct sfxge_evq *evq = arg1; + struct sfxge_softc *sc = evq->sc; + unsigned int id = arg2; + + SFXGE_ADAPTER_LOCK(sc); + + sfxge_evq_stat_update(evq); + + SFXGE_ADAPTER_UNLOCK(sc); + + return (SYSCTL_OUT(req, &evq->stats[id], sizeof(evq->stats[id]))); +} + +static int +sfxge_evq_stat_init(struct sfxge_evq *evq) +{ + struct sfxge_softc *sc = evq->sc; + struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev); + char name[16]; + struct sysctl_oid *evq_stats_node; + unsigned int id; + + snprintf(name, sizeof(name), "%u", evq->index); + evq_stats_node = SYSCTL_ADD_NODE(ctx, + SYSCTL_CHILDREN(sc->evqs_stats_node), + OID_AUTO, name, CTLFLAG_RD, NULL, ""); + if (evq_stats_node == NULL) + return (ENOMEM); + + for (id = 0; id < EV_NQSTATS; id++) { + SYSCTL_ADD_PROC( + ctx, SYSCTL_CHILDREN(evq_stats_node), + OID_AUTO, efx_ev_qstat_name(sc->enp, id), + CTLTYPE_U64|CTLFLAG_RD, + evq, id, sfxge_evq_stat_handler, "Q", + ""); + } + + return (0); +} + +static void sfxge_ev_stat_update(struct sfxge_softc *sc) { struct sfxge_evq *evq; unsigned int index; clock_t now; + unsigned int id; SFXGE_ADAPTER_LOCK(sc); - if (__predict_false(sc->evq[0]->init_state != SFXGE_EVQ_STARTED)) - goto out; - now = ticks; if ((unsigned int)(now - sc->ev_stats_update_time) < (unsigned int)hz) goto out; sc->ev_stats_update_time = now; - /* Add event counts from each event queue in turn */ + memset(sc->ev_stats, 0, sizeof(sc->ev_stats)); + + /* Update and add event counts from each event queue in turn */ for (index = 0; index < sc->evq_count; index++) { evq = sc->evq[index]; - SFXGE_EVQ_LOCK(evq); - efx_ev_qstats_update(evq->common, sc->ev_stats); - SFXGE_EVQ_UNLOCK(evq); + sfxge_evq_stat_update(evq); + for (id = 0; id < EV_NQSTATS; id++) + sc->ev_stats[id] += evq->stats[id]; } out: SFXGE_ADAPTER_UNLOCK(sc); @@ -665,7 +730,7 @@ sfxge_ev_qstop(struct sfxge_softc *sc, unsigned int in #if EFSYS_OPT_QSTATS /* Add event counts before discarding the common evq state */ - efx_ev_qstats_update(evq->common, sc->ev_stats); + efx_ev_qstats_update(evq->common, evq->stats); #endif efx_ev_qdestroy(evq->common); @@ -866,7 +931,24 @@ sfxge_ev_qinit(struct sfxge_softc *sc, unsigned int in evq->init_state = SFXGE_EVQ_INITIALIZED; +#if EFSYS_OPT_QSTATS + rc = sfxge_evq_stat_init(evq); + if (rc != 0) + goto fail_evq_stat_init; +#endif + return (0); + +#if EFSYS_OPT_QSTATS +fail_evq_stat_init: + evq->init_state = SFXGE_EVQ_UNINITIALIZED; + SFXGE_EVQ_LOCK_DESTROY(evq); + sfxge_dma_free(esmp); + sc->evq[index] = NULL; + free(evq, M_SFXGE); + + return (rc); +#endif } void @@ -915,6 +997,16 @@ sfxge_ev_init(struct sfxge_softc *sc) sc, 0, sfxge_int_mod_handler, "IU", "sfxge interrupt moderation (us)"); +#if EFSYS_OPT_QSTATS + sc->evqs_stats_node = SYSCTL_ADD_NODE( + device_get_sysctl_ctx(sc->dev), SYSCTL_CHILDREN(sc->stats_node), + OID_AUTO, "evq", CTLFLAG_RD, NULL, "Event queues stats"); + if (sc->evqs_stats_node == NULL) { + rc = ENOMEM; + goto fail_evqs_stats_node; + } +#endif + /* * Initialize the event queue(s) - one per interrupt. */ @@ -933,6 +1025,9 @@ fail: while (--index >= 0) sfxge_ev_qfini(sc, index); +#if EFSYS_OPT_QSTATS +fail_evqs_stats_node: +#endif sc->evq_count = 0; return (rc); }
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