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mirror_zfs/include/os/linux/zfs/sys/trace_arc.h
Alexander Motin ed2f7ba08d
Implement uncached prefetch 
Previously the primarycache property was handled only in the dbuf
layer. Since the speculative prefetcher is implemented in the ARC,
it had to be disabled for uncacheable buffers.

This change gives the ARC knowledge about uncacheable buffers
via  arc_read() and arc_write(). So when remove_reference() drops
the last reference on the ARC header, it can either immediately destroy
it, or if it is marked as prefetch, put it into a new arc_uncached state. 
That state is scanned every second, evicting stale buffers that were
not demand read.

This change also tracks dbufs that were read from the beginning,
but not to the end.  It is assumed that such buffers may receive further
reads, and so they are stored in dbuf cache. If a following
reads reaches the end of the buffer, it is immediately evicted.
Otherwise it will follow regular dbuf cache eviction.  Since the dbuf
layer does not know actual file sizes, this logic is not applied to
the final buffer of a dnode.

Since uncacheable buffers should no longer stay in the ARC for long,
this patch also tries to optimize I/O by allocating ARC physical
buffers as linear to allow buffer sharing.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Wilson <george.wilson@delphix.com>
Reviewed-by: Ryan Moeller <ryan@iXsystems.com>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Sponsored by: iXsystems, Inc.
Closes #14243
2023-01-04 17:29:54 -07:00

409 lines
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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 https://opensource.org/licenses/CDDL-1.0.
* 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)
#if 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_l2hdr.b_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 */
#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))
DEFINE_ARC_BUF_HDR_EVENT(zfs_arc__hit);
DEFINE_ARC_BUF_HDR_EVENT(zfs_arc__iohit);
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_new_state__uncached);
DEFINE_ARC_BUF_HDR_EVENT(zfs_arc__async__upgrade__sync);
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 */
#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))
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 */
#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))
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_l2hdr.b_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 */
#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))
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 */
#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))
DEFINE_L2ARC_EVICT_EVENT(zfs_l2arc__evict);
/*
* Generic support for three argument tracepoints of the form:
*
* DTRACE_PROBE3(...,
* uint64_t, ...,
* uint64_t, ...,
* uint64_t, ...);
*/
/* BEGIN CSTYLED */
DECLARE_EVENT_CLASS(zfs_arc_wait_for_eviction_class,
TP_PROTO(uint64_t amount, uint64_t arc_evict_count, uint64_t aew_count),
TP_ARGS(amount, arc_evict_count, aew_count),
TP_STRUCT__entry(
__field(uint64_t, amount)
__field(uint64_t, arc_evict_count)
__field(uint64_t, aew_count)
),
TP_fast_assign(
__entry->amount = amount;
__entry->arc_evict_count = arc_evict_count;
__entry->aew_count = aew_count;
),
TP_printk("amount %llu arc_evict_count %llu aew_count %llu",
__entry->amount, __entry->arc_evict_count, __entry->aew_count)
);
/* END CSTYLED */
#define DEFINE_ARC_WAIT_FOR_EVICTION_EVENT(name) \
DEFINE_EVENT(zfs_arc_wait_for_eviction_class, name, \
TP_PROTO(uint64_t amount, uint64_t arc_evict_count, uint64_t aew_count), \
TP_ARGS(amount, arc_evict_count, aew_count))
DEFINE_ARC_WAIT_FOR_EVICTION_EVENT(zfs_arc__wait__for__eviction);
#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>
#else
DEFINE_DTRACE_PROBE1(arc__hit);
DEFINE_DTRACE_PROBE1(arc__iohit);
DEFINE_DTRACE_PROBE1(arc__evict);
DEFINE_DTRACE_PROBE1(arc__delete);
DEFINE_DTRACE_PROBE1(new_state__mru);
DEFINE_DTRACE_PROBE1(new_state__mfu);
DEFINE_DTRACE_PROBE1(new_state__uncached);
DEFINE_DTRACE_PROBE1(arc__async__upgrade__sync);
DEFINE_DTRACE_PROBE1(l2arc__hit);
DEFINE_DTRACE_PROBE1(l2arc__miss);
DEFINE_DTRACE_PROBE2(l2arc__read);
DEFINE_DTRACE_PROBE2(l2arc__write);
DEFINE_DTRACE_PROBE2(l2arc__iodone);
DEFINE_DTRACE_PROBE3(arc__wait__for__eviction);
DEFINE_DTRACE_PROBE4(arc__miss);
DEFINE_DTRACE_PROBE4(l2arc__evict);
#endif /* HAVE_DECLARE_EVENT_CLASS */
#endif /* _KERNEL */
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