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freebsd-nq/include/sys/trace_arc.h
Tom Caputi a8b2e30685 Support re-prioritizing asynchronous prefetches 
When sequential scrubs were merged, all calls to arc_read()
(including prefetch IOs) were given ZIO_PRIORITY_ASYNC_READ.
Unfortunately, this behaves badly with an existing issue where
prefetch IOs cannot be re-prioritized after the issue. The
result is that synchronous reads end up in the same vdev_queue
as the scrub IOs and can have (in some workloads) multiple
seconds of latency.

This patch incorporates 2 changes. The first ensures that all
scrub IOs are given ZIO_PRIORITY_SCRUB to allow the vdev_queue
code to differentiate between these I/Os and user prefetches.
Second, this patch introduces zio_change_priority() to provide
the missing capability to upgrade a zio's priority.

Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Tom Caputi <tcaputi@datto.com>
Closes #6921 
Closes #6926
2017-12-21 09:13:06 -08:00

365 lines
12 KiB
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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
#include <sys/list.h>
#if defined(_KERNEL) && defined(HAVE_DECLARE_EVENT_CLASS)
#undef TRACE_SYSTEM
#define TRACE_SYSTEM zfs
#undef TRACE_SYSTEM_VAR
#define TRACE_SYSTEM_VAR zfs_arc
#if !defined(_TRACE_ARC_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_ARC_H
#include <linux/tracepoint.h>
#include <sys/types.h>
#include <sys/trace_common.h> /* For ZIO macros */
/*
* Generic support for one argument tracepoints of the form:
*
* DTRACE_PROBE1(...,
* arc_buf_hdr_t *, ...);
*/
/* BEGIN CSTYLED */
DECLARE_EVENT_CLASS(zfs_arc_buf_hdr_class,
TP_PROTO(arc_buf_hdr_t *ab),
TP_ARGS(ab),
TP_STRUCT__entry(
__array(uint64_t, hdr_dva_word, 2)
__field(uint64_t, hdr_birth)
__field(uint32_t, hdr_flags)
__field(uint32_t, hdr_bufcnt)
__field(arc_buf_contents_t, hdr_type)
__field(uint16_t, hdr_psize)
__field(uint16_t, hdr_lsize)
__field(uint64_t, hdr_spa)
__field(arc_state_type_t, hdr_state_type)
__field(clock_t, hdr_access)
__field(uint32_t, hdr_mru_hits)
__field(uint32_t, hdr_mru_ghost_hits)
__field(uint32_t, hdr_mfu_hits)
__field(uint32_t, hdr_mfu_ghost_hits)
__field(uint32_t, hdr_l2_hits)
__field(int64_t, hdr_refcount)
),
TP_fast_assign(
__entry->hdr_dva_word[0] = ab->b_dva.dva_word[0];
__entry->hdr_dva_word[1] = ab->b_dva.dva_word[1];
__entry->hdr_birth = ab->b_birth;
__entry->hdr_flags = ab->b_flags;
__entry->hdr_bufcnt = ab->b_l1hdr.b_bufcnt;
__entry->hdr_psize = ab->b_psize;
__entry->hdr_lsize = ab->b_lsize;
__entry->hdr_spa = ab->b_spa;
__entry->hdr_state_type = ab->b_l1hdr.b_state->arcs_state;
__entry->hdr_access = ab->b_l1hdr.b_arc_access;
__entry->hdr_mru_hits = ab->b_l1hdr.b_mru_hits;
__entry->hdr_mru_ghost_hits = ab->b_l1hdr.b_mru_ghost_hits;
__entry->hdr_mfu_hits = ab->b_l1hdr.b_mfu_hits;
__entry->hdr_mfu_ghost_hits = ab->b_l1hdr.b_mfu_ghost_hits;
__entry->hdr_l2_hits = ab->b_l1hdr.b_l2_hits;
__entry->hdr_refcount = ab->b_l1hdr.b_refcnt.rc_count;
),
TP_printk("hdr { dva 0x%llx:0x%llx birth %llu "
"flags 0x%x bufcnt %u type %u psize %u lsize %u spa %llu "
"state_type %u access %lu mru_hits %u mru_ghost_hits %u "
"mfu_hits %u mfu_ghost_hits %u l2_hits %u refcount %lli }",
__entry->hdr_dva_word[0], __entry->hdr_dva_word[1],
__entry->hdr_birth, __entry->hdr_flags,
__entry->hdr_bufcnt, __entry->hdr_type, __entry->hdr_psize,
__entry->hdr_lsize, __entry->hdr_spa, __entry->hdr_state_type,
__entry->hdr_access, __entry->hdr_mru_hits,
__entry->hdr_mru_ghost_hits, __entry->hdr_mfu_hits,
__entry->hdr_mfu_ghost_hits, __entry->hdr_l2_hits,
__entry->hdr_refcount)
);
/* END CSTYLED */
/* BEGIN CSTYLED */
#define DEFINE_ARC_BUF_HDR_EVENT(name) \
DEFINE_EVENT(zfs_arc_buf_hdr_class, name, \
TP_PROTO(arc_buf_hdr_t *ab), \
TP_ARGS(ab))
/* END CSTYLED */
DEFINE_ARC_BUF_HDR_EVENT(zfs_arc__hit);
DEFINE_ARC_BUF_HDR_EVENT(zfs_arc__evict);
DEFINE_ARC_BUF_HDR_EVENT(zfs_arc__delete);
DEFINE_ARC_BUF_HDR_EVENT(zfs_new_state__mru);
DEFINE_ARC_BUF_HDR_EVENT(zfs_new_state__mfu);
DEFINE_ARC_BUF_HDR_EVENT(zfs_arc__async__upgrade__sync);
DEFINE_ARC_BUF_HDR_EVENT(zfs_arc__demand__hit__predictive__prefetch);
DEFINE_ARC_BUF_HDR_EVENT(zfs_l2arc__hit);
DEFINE_ARC_BUF_HDR_EVENT(zfs_l2arc__miss);
/*
* Generic support for two argument tracepoints of the form:
*
* DTRACE_PROBE2(...,
* vdev_t *, ...,
* zio_t *, ...);
*/
/* BEGIN CSTYLED */
DECLARE_EVENT_CLASS(zfs_l2arc_rw_class,
TP_PROTO(vdev_t *vd, zio_t *zio),
TP_ARGS(vd, zio),
TP_STRUCT__entry(
__field(uint64_t, vdev_id)
__field(uint64_t, vdev_guid)
__field(uint64_t, vdev_state)
ZIO_TP_STRUCT_ENTRY
),
TP_fast_assign(
__entry->vdev_id = vd->vdev_id;
__entry->vdev_guid = vd->vdev_guid;
__entry->vdev_state = vd->vdev_state;
ZIO_TP_FAST_ASSIGN
),
TP_printk("vdev { id %llu guid %llu state %llu } "
ZIO_TP_PRINTK_FMT, __entry->vdev_id, __entry->vdev_guid,
__entry->vdev_state, ZIO_TP_PRINTK_ARGS)
);
/* END CSTYLED */
/* BEGIN CSTYLED */
#define DEFINE_L2ARC_RW_EVENT(name) \
DEFINE_EVENT(zfs_l2arc_rw_class, name, \
TP_PROTO(vdev_t *vd, zio_t *zio), \
TP_ARGS(vd, zio))
/* END CSTYLED */
DEFINE_L2ARC_RW_EVENT(zfs_l2arc__read);
DEFINE_L2ARC_RW_EVENT(zfs_l2arc__write);
/*
* Generic support for two argument tracepoints of the form:
*
* DTRACE_PROBE2(...,
* zio_t *, ...,
* l2arc_write_callback_t *, ...);
*/
/* BEGIN CSTYLED */
DECLARE_EVENT_CLASS(zfs_l2arc_iodone_class,
TP_PROTO(zio_t *zio, l2arc_write_callback_t *cb),
TP_ARGS(zio, cb),
TP_STRUCT__entry(ZIO_TP_STRUCT_ENTRY),
TP_fast_assign(ZIO_TP_FAST_ASSIGN),
TP_printk(ZIO_TP_PRINTK_FMT, ZIO_TP_PRINTK_ARGS)
);
/* END CSTYLED */
/* BEGIN CSTYLED */
#define DEFINE_L2ARC_IODONE_EVENT(name) \
DEFINE_EVENT(zfs_l2arc_iodone_class, name, \
TP_PROTO(zio_t *zio, l2arc_write_callback_t *cb), \
TP_ARGS(zio, cb))
/* END CSTYLED */
DEFINE_L2ARC_IODONE_EVENT(zfs_l2arc__iodone);
/*
* Generic support for four argument tracepoints of the form:
*
* DTRACE_PROBE4(...,
* arc_buf_hdr_t *, ...,
* const blkptr_t *,
* uint64_t,
* const zbookmark_phys_t *);
*/
/* BEGIN CSTYLED */
DECLARE_EVENT_CLASS(zfs_arc_miss_class,
TP_PROTO(arc_buf_hdr_t *hdr,
const blkptr_t *bp, uint64_t size, const zbookmark_phys_t *zb),
TP_ARGS(hdr, bp, size, zb),
TP_STRUCT__entry(
__array(uint64_t, hdr_dva_word, 2)
__field(uint64_t, hdr_birth)
__field(uint32_t, hdr_flags)
__field(uint32_t, hdr_bufcnt)
__field(arc_buf_contents_t, hdr_type)
__field(uint16_t, hdr_psize)
__field(uint16_t, hdr_lsize)
__field(uint64_t, hdr_spa)
__field(arc_state_type_t, hdr_state_type)
__field(clock_t, hdr_access)
__field(uint32_t, hdr_mru_hits)
__field(uint32_t, hdr_mru_ghost_hits)
__field(uint32_t, hdr_mfu_hits)
__field(uint32_t, hdr_mfu_ghost_hits)
__field(uint32_t, hdr_l2_hits)
__field(int64_t, hdr_refcount)
__array(uint64_t, bp_dva0, 2)
__array(uint64_t, bp_dva1, 2)
__array(uint64_t, bp_dva2, 2)
__array(uint64_t, bp_cksum, 4)
__field(uint64_t, bp_lsize)
__field(uint64_t, zb_objset)
__field(uint64_t, zb_object)
__field(int64_t, zb_level)
__field(uint64_t, zb_blkid)
),
TP_fast_assign(
__entry->hdr_dva_word[0] = hdr->b_dva.dva_word[0];
__entry->hdr_dva_word[1] = hdr->b_dva.dva_word[1];
__entry->hdr_birth = hdr->b_birth;
__entry->hdr_flags = hdr->b_flags;
__entry->hdr_bufcnt = hdr->b_l1hdr.b_bufcnt;
__entry->hdr_psize = hdr->b_psize;
__entry->hdr_lsize = hdr->b_lsize;
__entry->hdr_spa = hdr->b_spa;
__entry->hdr_state_type = hdr->b_l1hdr.b_state->arcs_state;
__entry->hdr_access = hdr->b_l1hdr.b_arc_access;
__entry->hdr_mru_hits = hdr->b_l1hdr.b_mru_hits;
__entry->hdr_mru_ghost_hits = hdr->b_l1hdr.b_mru_ghost_hits;
__entry->hdr_mfu_hits = hdr->b_l1hdr.b_mfu_hits;
__entry->hdr_mfu_ghost_hits = hdr->b_l1hdr.b_mfu_ghost_hits;
__entry->hdr_l2_hits = hdr->b_l1hdr.b_l2_hits;
__entry->hdr_refcount = hdr->b_l1hdr.b_refcnt.rc_count;
__entry->bp_dva0[0] = bp->blk_dva[0].dva_word[0];
__entry->bp_dva0[1] = bp->blk_dva[0].dva_word[1];
__entry->bp_dva1[0] = bp->blk_dva[1].dva_word[0];
__entry->bp_dva1[1] = bp->blk_dva[1].dva_word[1];
__entry->bp_dva2[0] = bp->blk_dva[2].dva_word[0];
__entry->bp_dva2[1] = bp->blk_dva[2].dva_word[1];
__entry->bp_cksum[0] = bp->blk_cksum.zc_word[0];
__entry->bp_cksum[1] = bp->blk_cksum.zc_word[1];
__entry->bp_cksum[2] = bp->blk_cksum.zc_word[2];
__entry->bp_cksum[3] = bp->blk_cksum.zc_word[3];
__entry->bp_lsize = size;
__entry->zb_objset = zb->zb_objset;
__entry->zb_object = zb->zb_object;
__entry->zb_level = zb->zb_level;
__entry->zb_blkid = zb->zb_blkid;
),
TP_printk("hdr { dva 0x%llx:0x%llx birth %llu "
"flags 0x%x bufcnt %u psize %u lsize %u spa %llu state_type %u "
"access %lu mru_hits %u mru_ghost_hits %u mfu_hits %u "
"mfu_ghost_hits %u l2_hits %u refcount %lli } "
"bp { dva0 0x%llx:0x%llx dva1 0x%llx:0x%llx dva2 "
"0x%llx:0x%llx cksum 0x%llx:0x%llx:0x%llx:0x%llx "
"lsize %llu } zb { objset %llu object %llu level %lli "
"blkid %llu }",
__entry->hdr_dva_word[0], __entry->hdr_dva_word[1],
__entry->hdr_birth, __entry->hdr_flags,
__entry->hdr_bufcnt, __entry->hdr_psize, __entry->hdr_lsize,
__entry->hdr_spa, __entry->hdr_state_type, __entry->hdr_access,
__entry->hdr_mru_hits, __entry->hdr_mru_ghost_hits,
__entry->hdr_mfu_hits, __entry->hdr_mfu_ghost_hits,
__entry->hdr_l2_hits, __entry->hdr_refcount,
__entry->bp_dva0[0], __entry->bp_dva0[1],
__entry->bp_dva1[0], __entry->bp_dva1[1],
__entry->bp_dva2[0], __entry->bp_dva2[1],
__entry->bp_cksum[0], __entry->bp_cksum[1],
__entry->bp_cksum[2], __entry->bp_cksum[3],
__entry->bp_lsize, __entry->zb_objset, __entry->zb_object,
__entry->zb_level, __entry->zb_blkid)
);
/* END CSTYLED */
/* BEGIN CSTYLED */
#define DEFINE_ARC_MISS_EVENT(name) \
DEFINE_EVENT(zfs_arc_miss_class, name, \
TP_PROTO(arc_buf_hdr_t *hdr, \
const blkptr_t *bp, uint64_t size, const zbookmark_phys_t *zb), \
TP_ARGS(hdr, bp, size, zb))
/* END CSTYLED */
DEFINE_ARC_MISS_EVENT(zfs_arc__miss);
/*
* Generic support for four argument tracepoints of the form:
*
* DTRACE_PROBE4(...,
* l2arc_dev_t *, ...,
* list_t *, ...,
* uint64_t, ...,
* boolean_t, ...);
*/
/* BEGIN CSTYLED */
DECLARE_EVENT_CLASS(zfs_l2arc_evict_class,
TP_PROTO(l2arc_dev_t *dev,
list_t *buflist, uint64_t taddr, boolean_t all),
TP_ARGS(dev, buflist, taddr, all),
TP_STRUCT__entry(
__field(uint64_t, vdev_id)
__field(uint64_t, vdev_guid)
__field(uint64_t, vdev_state)
__field(uint64_t, l2ad_hand)
__field(uint64_t, l2ad_start)
__field(uint64_t, l2ad_end)
__field(boolean_t, l2ad_first)
__field(boolean_t, l2ad_writing)
__field(uint64_t, taddr)
__field(boolean_t, all)
),
TP_fast_assign(
__entry->vdev_id = dev->l2ad_vdev->vdev_id;
__entry->vdev_guid = dev->l2ad_vdev->vdev_guid;
__entry->vdev_state = dev->l2ad_vdev->vdev_state;
__entry->l2ad_hand = dev->l2ad_hand;
__entry->l2ad_start = dev->l2ad_start;
__entry->l2ad_end = dev->l2ad_end;
__entry->l2ad_first = dev->l2ad_first;
__entry->l2ad_writing = dev->l2ad_writing;
__entry->taddr = taddr;
__entry->all = all;
),
TP_printk("l2ad { vdev { id %llu guid %llu state %llu } "
"hand %llu start %llu end %llu "
"first %d writing %d } taddr %llu all %d",
__entry->vdev_id, __entry->vdev_guid, __entry->vdev_state,
__entry->l2ad_hand, __entry->l2ad_start,
__entry->l2ad_end, __entry->l2ad_first, __entry->l2ad_writing,
__entry->taddr, __entry->all)
);
/* END CSTYLED */
/* BEGIN CSTYLED */
#define DEFINE_L2ARC_EVICT_EVENT(name) \
DEFINE_EVENT(zfs_l2arc_evict_class, name, \
TP_PROTO(l2arc_dev_t *dev, \
list_t *buflist, uint64_t taddr, boolean_t all), \
TP_ARGS(dev, buflist, taddr, all))
/* END CSTYLED */
DEFINE_L2ARC_EVICT_EVENT(zfs_l2arc__evict);
#endif /* _TRACE_ARC_H */
#undef TRACE_INCLUDE_PATH
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_PATH sys
#define TRACE_INCLUDE_FILE trace_arc
#include <trace/define_trace.h>
#endif /* _KERNEL && HAVE_DECLARE_EVENT_CLASS */
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