9e733d3923
This patch improves the tracing of block reservations by removing some corner cases and also providing more useful detail in the traces. A new field is added to the reservation structure to contain the inode number. This is used since in certain contexts it is not possible to access the inode itself to obtain this information. As a result we can then display the inode number for all tracepoints and also in case we dump the resource group. The "del" tracepoint operation has been removed. This could be called with the reservation rgrp set to NULL. That resulted in not printing the device number, and thus making the information largely useless anyway. Also, the conditional on the rgrp being NULL can then be removed from the tracepoint. After this change, all the block reservation tracepoint calls will be called with the rgrp information. The existing ins,clm and tdel calls to the block reservation tracepoint are sufficient to track the entire life of the block reservation. In gfs2_block_alloc() the error detection is updated to print out the inode number of the problematic inode. This can then be compared against the information in the glock dump,tracepoints, etc. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
555 lines
15 KiB
C
555 lines
15 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM gfs2
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#if !defined(_TRACE_GFS2_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_GFS2_H
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#include <linux/tracepoint.h>
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#include <linux/fs.h>
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#include <linux/buffer_head.h>
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#include <linux/dlmconstants.h>
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#include <linux/gfs2_ondisk.h>
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#include <linux/writeback.h>
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#include <linux/ktime.h>
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#include "incore.h"
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#include "glock.h"
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#include "rgrp.h"
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#define dlm_state_name(nn) { DLM_LOCK_##nn, #nn }
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#define glock_trace_name(x) __print_symbolic(x, \
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dlm_state_name(IV), \
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dlm_state_name(NL), \
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dlm_state_name(CR), \
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dlm_state_name(CW), \
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dlm_state_name(PR), \
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dlm_state_name(PW), \
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dlm_state_name(EX))
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#define block_state_name(x) __print_symbolic(x, \
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{ GFS2_BLKST_FREE, "free" }, \
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{ GFS2_BLKST_USED, "used" }, \
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{ GFS2_BLKST_DINODE, "dinode" }, \
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{ GFS2_BLKST_UNLINKED, "unlinked" })
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#define TRACE_RS_DELETE 0
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#define TRACE_RS_TREEDEL 1
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#define TRACE_RS_INSERT 2
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#define TRACE_RS_CLAIM 3
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#define rs_func_name(x) __print_symbolic(x, \
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{ 0, "del " }, \
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{ 1, "tdel" }, \
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{ 2, "ins " }, \
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{ 3, "clm " })
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#define show_glock_flags(flags) __print_flags(flags, "", \
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{(1UL << GLF_LOCK), "l" }, \
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{(1UL << GLF_DEMOTE), "D" }, \
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{(1UL << GLF_PENDING_DEMOTE), "d" }, \
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{(1UL << GLF_DEMOTE_IN_PROGRESS), "p" }, \
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{(1UL << GLF_DIRTY), "y" }, \
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{(1UL << GLF_LFLUSH), "f" }, \
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{(1UL << GLF_INVALIDATE_IN_PROGRESS), "i" }, \
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{(1UL << GLF_REPLY_PENDING), "r" }, \
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{(1UL << GLF_INITIAL), "I" }, \
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{(1UL << GLF_FROZEN), "F" }, \
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{(1UL << GLF_QUEUED), "q" }, \
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{(1UL << GLF_LRU), "L" }, \
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{(1UL << GLF_OBJECT), "o" }, \
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{(1UL << GLF_BLOCKING), "b" })
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#ifndef NUMPTY
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#define NUMPTY
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static inline u8 glock_trace_state(unsigned int state)
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{
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switch(state) {
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case LM_ST_SHARED:
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return DLM_LOCK_PR;
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case LM_ST_DEFERRED:
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return DLM_LOCK_CW;
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case LM_ST_EXCLUSIVE:
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return DLM_LOCK_EX;
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}
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return DLM_LOCK_NL;
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}
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#endif
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/* Section 1 - Locking
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*
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* Objectives:
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* Latency: Remote demote request to state change
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* Latency: Local lock request to state change
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* Latency: State change to lock grant
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* Correctness: Ordering of local lock state vs. I/O requests
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* Correctness: Responses to remote demote requests
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*/
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/* General glock state change (DLM lock request completes) */
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TRACE_EVENT(gfs2_glock_state_change,
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TP_PROTO(const struct gfs2_glock *gl, unsigned int new_state),
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TP_ARGS(gl, new_state),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( u64, glnum )
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__field( u32, gltype )
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__field( u8, cur_state )
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__field( u8, new_state )
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__field( u8, dmt_state )
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__field( u8, tgt_state )
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__field( unsigned long, flags )
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),
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TP_fast_assign(
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__entry->dev = gl->gl_sbd->sd_vfs->s_dev;
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__entry->glnum = gl->gl_name.ln_number;
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__entry->gltype = gl->gl_name.ln_type;
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__entry->cur_state = glock_trace_state(gl->gl_state);
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__entry->new_state = glock_trace_state(new_state);
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__entry->tgt_state = glock_trace_state(gl->gl_target);
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__entry->dmt_state = glock_trace_state(gl->gl_demote_state);
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__entry->flags = gl->gl_flags | (gl->gl_object ? (1UL<<GLF_OBJECT) : 0);
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),
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TP_printk("%u,%u glock %d:%lld state %s to %s tgt:%s dmt:%s flags:%s",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->gltype,
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(unsigned long long)__entry->glnum,
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glock_trace_name(__entry->cur_state),
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glock_trace_name(__entry->new_state),
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glock_trace_name(__entry->tgt_state),
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glock_trace_name(__entry->dmt_state),
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show_glock_flags(__entry->flags))
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);
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/* State change -> unlocked, glock is being deallocated */
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TRACE_EVENT(gfs2_glock_put,
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TP_PROTO(const struct gfs2_glock *gl),
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TP_ARGS(gl),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( u64, glnum )
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__field( u32, gltype )
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__field( u8, cur_state )
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__field( unsigned long, flags )
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),
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TP_fast_assign(
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__entry->dev = gl->gl_sbd->sd_vfs->s_dev;
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__entry->gltype = gl->gl_name.ln_type;
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__entry->glnum = gl->gl_name.ln_number;
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__entry->cur_state = glock_trace_state(gl->gl_state);
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__entry->flags = gl->gl_flags | (gl->gl_object ? (1UL<<GLF_OBJECT) : 0);
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),
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TP_printk("%u,%u glock %d:%lld state %s => %s flags:%s",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->gltype, (unsigned long long)__entry->glnum,
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glock_trace_name(__entry->cur_state),
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glock_trace_name(DLM_LOCK_IV),
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show_glock_flags(__entry->flags))
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);
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/* Callback (local or remote) requesting lock demotion */
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TRACE_EVENT(gfs2_demote_rq,
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TP_PROTO(const struct gfs2_glock *gl),
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TP_ARGS(gl),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( u64, glnum )
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__field( u32, gltype )
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__field( u8, cur_state )
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__field( u8, dmt_state )
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__field( unsigned long, flags )
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),
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TP_fast_assign(
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__entry->dev = gl->gl_sbd->sd_vfs->s_dev;
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__entry->gltype = gl->gl_name.ln_type;
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__entry->glnum = gl->gl_name.ln_number;
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__entry->cur_state = glock_trace_state(gl->gl_state);
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__entry->dmt_state = glock_trace_state(gl->gl_demote_state);
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__entry->flags = gl->gl_flags | (gl->gl_object ? (1UL<<GLF_OBJECT) : 0);
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),
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TP_printk("%u,%u glock %d:%lld demote %s to %s flags:%s",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->gltype,
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(unsigned long long)__entry->glnum,
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glock_trace_name(__entry->cur_state),
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glock_trace_name(__entry->dmt_state),
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show_glock_flags(__entry->flags))
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);
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/* Promotion/grant of a glock */
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TRACE_EVENT(gfs2_promote,
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TP_PROTO(const struct gfs2_holder *gh, int first),
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TP_ARGS(gh, first),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( u64, glnum )
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__field( u32, gltype )
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__field( int, first )
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__field( u8, state )
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),
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TP_fast_assign(
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__entry->dev = gh->gh_gl->gl_sbd->sd_vfs->s_dev;
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__entry->glnum = gh->gh_gl->gl_name.ln_number;
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__entry->gltype = gh->gh_gl->gl_name.ln_type;
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__entry->first = first;
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__entry->state = glock_trace_state(gh->gh_state);
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),
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TP_printk("%u,%u glock %u:%llu promote %s %s",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->gltype,
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(unsigned long long)__entry->glnum,
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__entry->first ? "first": "other",
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glock_trace_name(__entry->state))
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);
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/* Queue/dequeue a lock request */
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TRACE_EVENT(gfs2_glock_queue,
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TP_PROTO(const struct gfs2_holder *gh, int queue),
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TP_ARGS(gh, queue),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( u64, glnum )
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__field( u32, gltype )
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__field( int, queue )
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__field( u8, state )
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),
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TP_fast_assign(
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__entry->dev = gh->gh_gl->gl_sbd->sd_vfs->s_dev;
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__entry->glnum = gh->gh_gl->gl_name.ln_number;
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__entry->gltype = gh->gh_gl->gl_name.ln_type;
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__entry->queue = queue;
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__entry->state = glock_trace_state(gh->gh_state);
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),
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TP_printk("%u,%u glock %u:%llu %squeue %s",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->gltype,
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(unsigned long long)__entry->glnum,
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__entry->queue ? "" : "de",
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glock_trace_name(__entry->state))
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);
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/* DLM sends a reply to GFS2 */
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TRACE_EVENT(gfs2_glock_lock_time,
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TP_PROTO(const struct gfs2_glock *gl, s64 tdiff),
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TP_ARGS(gl, tdiff),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( u64, glnum )
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__field( u32, gltype )
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__field( int, status )
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__field( char, flags )
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__field( s64, tdiff )
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__field( s64, srtt )
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__field( s64, srttvar )
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__field( s64, srttb )
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__field( s64, srttvarb )
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__field( s64, sirt )
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__field( s64, sirtvar )
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__field( s64, dcount )
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__field( s64, qcount )
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),
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TP_fast_assign(
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__entry->dev = gl->gl_sbd->sd_vfs->s_dev;
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__entry->glnum = gl->gl_name.ln_number;
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__entry->gltype = gl->gl_name.ln_type;
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__entry->status = gl->gl_lksb.sb_status;
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__entry->flags = gl->gl_lksb.sb_flags;
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__entry->tdiff = tdiff;
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__entry->srtt = gl->gl_stats.stats[GFS2_LKS_SRTT];
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__entry->srttvar = gl->gl_stats.stats[GFS2_LKS_SRTTVAR];
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__entry->srttb = gl->gl_stats.stats[GFS2_LKS_SRTTB];
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__entry->srttvarb = gl->gl_stats.stats[GFS2_LKS_SRTTVARB];
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__entry->sirt = gl->gl_stats.stats[GFS2_LKS_SIRT];
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__entry->sirtvar = gl->gl_stats.stats[GFS2_LKS_SIRTVAR];
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__entry->dcount = gl->gl_stats.stats[GFS2_LKS_DCOUNT];
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__entry->qcount = gl->gl_stats.stats[GFS2_LKS_QCOUNT];
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),
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TP_printk("%u,%u glock %d:%lld status:%d flags:%02x tdiff:%lld srtt:%lld/%lld srttb:%lld/%lld sirt:%lld/%lld dcnt:%lld qcnt:%lld",
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MAJOR(__entry->dev), MINOR(__entry->dev), __entry->gltype,
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(unsigned long long)__entry->glnum,
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__entry->status, __entry->flags,
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(long long)__entry->tdiff,
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(long long)__entry->srtt,
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(long long)__entry->srttvar,
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(long long)__entry->srttb,
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(long long)__entry->srttvarb,
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(long long)__entry->sirt,
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(long long)__entry->sirtvar,
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(long long)__entry->dcount,
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(long long)__entry->qcount)
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);
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/* Section 2 - Log/journal
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*
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* Objectives:
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* Latency: Log flush time
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* Correctness: pin/unpin vs. disk I/O ordering
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* Performance: Log usage stats
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*/
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/* Pin/unpin a block in the log */
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TRACE_EVENT(gfs2_pin,
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TP_PROTO(const struct gfs2_bufdata *bd, int pin),
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TP_ARGS(bd, pin),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( int, pin )
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__field( u32, len )
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__field( sector_t, block )
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__field( u64, ino )
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),
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TP_fast_assign(
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__entry->dev = bd->bd_gl->gl_sbd->sd_vfs->s_dev;
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__entry->pin = pin;
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__entry->len = bd->bd_bh->b_size;
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__entry->block = bd->bd_bh->b_blocknr;
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__entry->ino = bd->bd_gl->gl_name.ln_number;
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),
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TP_printk("%u,%u log %s %llu/%lu inode %llu",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->pin ? "pin" : "unpin",
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(unsigned long long)__entry->block,
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(unsigned long)__entry->len,
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(unsigned long long)__entry->ino)
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);
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/* Flushing the log */
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TRACE_EVENT(gfs2_log_flush,
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TP_PROTO(const struct gfs2_sbd *sdp, int start),
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TP_ARGS(sdp, start),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( int, start )
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__field( u64, log_seq )
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),
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TP_fast_assign(
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__entry->dev = sdp->sd_vfs->s_dev;
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__entry->start = start;
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__entry->log_seq = sdp->sd_log_sequence;
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),
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TP_printk("%u,%u log flush %s %llu",
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MAJOR(__entry->dev), MINOR(__entry->dev),
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__entry->start ? "start" : "end",
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(unsigned long long)__entry->log_seq)
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);
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/* Reserving/releasing blocks in the log */
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TRACE_EVENT(gfs2_log_blocks,
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TP_PROTO(const struct gfs2_sbd *sdp, int blocks),
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TP_ARGS(sdp, blocks),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( int, blocks )
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),
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TP_fast_assign(
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__entry->dev = sdp->sd_vfs->s_dev;
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__entry->blocks = blocks;
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),
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TP_printk("%u,%u log reserve %d", MAJOR(__entry->dev),
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MINOR(__entry->dev), __entry->blocks)
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);
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/* Writing back the AIL */
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TRACE_EVENT(gfs2_ail_flush,
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TP_PROTO(const struct gfs2_sbd *sdp, const struct writeback_control *wbc, int start),
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TP_ARGS(sdp, wbc, start),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( int, start )
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__field( int, sync_mode )
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__field( long, nr_to_write )
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),
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TP_fast_assign(
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__entry->dev = sdp->sd_vfs->s_dev;
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__entry->start = start;
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__entry->sync_mode = wbc->sync_mode;
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__entry->nr_to_write = wbc->nr_to_write;
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),
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TP_printk("%u,%u ail flush %s %s %ld", MAJOR(__entry->dev),
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MINOR(__entry->dev), __entry->start ? "start" : "end",
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__entry->sync_mode == WB_SYNC_ALL ? "all" : "none",
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__entry->nr_to_write)
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);
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/* Section 3 - bmap
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*
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* Objectives:
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* Latency: Bmap request time
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* Performance: Block allocator tracing
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* Correctness: Test of disard generation vs. blocks allocated
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*/
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/* Map an extent of blocks, possibly a new allocation */
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TRACE_EVENT(gfs2_bmap,
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TP_PROTO(const struct gfs2_inode *ip, const struct buffer_head *bh,
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sector_t lblock, int create, int errno),
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TP_ARGS(ip, bh, lblock, create, errno),
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TP_STRUCT__entry(
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__field( dev_t, dev )
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__field( sector_t, lblock )
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__field( sector_t, pblock )
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__field( u64, inum )
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__field( unsigned long, state )
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__field( u32, len )
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__field( int, create )
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__field( int, errno )
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),
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TP_fast_assign(
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__entry->dev = ip->i_gl->gl_sbd->sd_vfs->s_dev;
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__entry->lblock = lblock;
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__entry->pblock = buffer_mapped(bh) ? bh->b_blocknr : 0;
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__entry->inum = ip->i_no_addr;
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__entry->state = bh->b_state;
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__entry->len = bh->b_size;
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__entry->create = create;
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__entry->errno = errno;
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),
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TP_printk("%u,%u bmap %llu map %llu/%lu to %llu flags:%08lx %s %d",
|
|
MAJOR(__entry->dev), MINOR(__entry->dev),
|
|
(unsigned long long)__entry->inum,
|
|
(unsigned long long)__entry->lblock,
|
|
(unsigned long)__entry->len,
|
|
(unsigned long long)__entry->pblock,
|
|
__entry->state, __entry->create ? "create " : "nocreate",
|
|
__entry->errno)
|
|
);
|
|
|
|
/* Keep track of blocks as they are allocated/freed */
|
|
TRACE_EVENT(gfs2_block_alloc,
|
|
|
|
TP_PROTO(const struct gfs2_inode *ip, struct gfs2_rgrpd *rgd,
|
|
u64 block, unsigned len, u8 block_state),
|
|
|
|
TP_ARGS(ip, rgd, block, len, block_state),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( dev_t, dev )
|
|
__field( u64, start )
|
|
__field( u64, inum )
|
|
__field( u32, len )
|
|
__field( u8, block_state )
|
|
__field( u64, rd_addr )
|
|
__field( u32, rd_free_clone )
|
|
__field( u32, rd_reserved )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->dev = ip->i_gl->gl_sbd->sd_vfs->s_dev;
|
|
__entry->start = block;
|
|
__entry->inum = ip->i_no_addr;
|
|
__entry->len = len;
|
|
__entry->block_state = block_state;
|
|
__entry->rd_addr = rgd->rd_addr;
|
|
__entry->rd_free_clone = rgd->rd_free_clone;
|
|
__entry->rd_reserved = rgd->rd_reserved;
|
|
),
|
|
|
|
TP_printk("%u,%u bmap %llu alloc %llu/%lu %s rg:%llu rf:%u rr:%lu",
|
|
MAJOR(__entry->dev), MINOR(__entry->dev),
|
|
(unsigned long long)__entry->inum,
|
|
(unsigned long long)__entry->start,
|
|
(unsigned long)__entry->len,
|
|
block_state_name(__entry->block_state),
|
|
(unsigned long long)__entry->rd_addr,
|
|
__entry->rd_free_clone, (unsigned long)__entry->rd_reserved)
|
|
);
|
|
|
|
/* Keep track of multi-block reservations as they are allocated/freed */
|
|
TRACE_EVENT(gfs2_rs,
|
|
|
|
TP_PROTO(const struct gfs2_blkreserv *rs, u8 func),
|
|
|
|
TP_ARGS(rs, func),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( dev_t, dev )
|
|
__field( u64, rd_addr )
|
|
__field( u32, rd_free_clone )
|
|
__field( u32, rd_reserved )
|
|
__field( u64, inum )
|
|
__field( u64, start )
|
|
__field( u32, free )
|
|
__field( u8, func )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->dev = rs->rs_rbm.rgd->rd_sbd->sd_vfs->s_dev;
|
|
__entry->rd_addr = rs->rs_rbm.rgd->rd_addr;
|
|
__entry->rd_free_clone = rs->rs_rbm.rgd->rd_free_clone;
|
|
__entry->rd_reserved = rs->rs_rbm.rgd->rd_reserved;
|
|
__entry->inum = rs->rs_inum;
|
|
__entry->start = gfs2_rbm_to_block(&rs->rs_rbm);
|
|
__entry->free = rs->rs_free;
|
|
__entry->func = func;
|
|
),
|
|
|
|
TP_printk("%u,%u bmap %llu resrv %llu rg:%llu rf:%lu rr:%lu %s f:%lu",
|
|
MAJOR(__entry->dev), MINOR(__entry->dev),
|
|
(unsigned long long)__entry->inum,
|
|
(unsigned long long)__entry->start,
|
|
(unsigned long long)__entry->rd_addr,
|
|
(unsigned long)__entry->rd_free_clone,
|
|
(unsigned long)__entry->rd_reserved,
|
|
rs_func_name(__entry->func), (unsigned long)__entry->free)
|
|
);
|
|
|
|
#endif /* _TRACE_GFS2_H */
|
|
|
|
/* This part must be outside protection */
|
|
#undef TRACE_INCLUDE_PATH
|
|
#define TRACE_INCLUDE_PATH .
|
|
#define TRACE_INCLUDE_FILE trace_gfs2
|
|
#include <trace/define_trace.h>
|
|
|