Viewing file:  rcu.h (24.21 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* SPDX-License-Identifier: GPL-2.0 */
#undef TRACE_SYSTEM
#define TRACE_SYSTEM rcu
#if !defined(_TRACE_RCU_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_RCU_H
#include <linux/tracepoint.h>
#ifdef CONFIG_RCU_TRACE
#define TRACE_EVENT_RCU TRACE_EVENT
#else
#define TRACE_EVENT_RCU TRACE_EVENT_NOP
#endif
/*
* Tracepoint for start/end markers used for utilization calculations.
* By convention, the string is of the following forms:
*
* "Start <activity>" -- Mark the start of the specified activity,
* such as "context switch". Nesting is permitted.
* "End <activity>" -- Mark the end of the specified activity.
*
* An "@" character within "<activity>" is a comment character: Data
* reduction scripts will ignore the "@" and the remainder of the line.
*/
TRACE_EVENT(rcu_utilization,
TP_PROTO(const char *s),
TP_ARGS(s),
TP_STRUCT__entry(
__field(const char *, s)
),
TP_fast_assign(
__entry->s = s;
),
TP_printk("%s", __entry->s)
);
#if defined(CONFIG_TREE_RCU)
/*
* Tracepoint for grace-period events. Takes a string identifying the
* RCU flavor, the grace-period number, and a string identifying the
* grace-period-related event as follows:
*
* "AccReadyCB": CPU accelerates new callbacks to RCU_NEXT_READY_TAIL.
* "AccWaitCB": CPU accelerates new callbacks to RCU_WAIT_TAIL.
* "newreq": Request a new grace period.
* "start": Start a grace period.
* "cpustart": CPU first notices a grace-period start.
* "cpuqs": CPU passes through a quiescent state.
* "cpuonl": CPU comes online.
* "cpuofl": CPU goes offline.
* "cpuofl-bgp": CPU goes offline while blocking a grace period.
* "reqwait": GP kthread sleeps waiting for grace-period request.
* "reqwaitsig": GP kthread awakened by signal from reqwait state.
* "fqswait": GP kthread waiting until time to force quiescent states.
* "fqsstart": GP kthread starts forcing quiescent states.
* "fqsend": GP kthread done forcing quiescent states.
* "fqswaitsig": GP kthread awakened by signal from fqswait state.
* "end": End a grace period.
* "cpuend": CPU first notices a grace-period end.
*/
TRACE_EVENT_RCU(rcu_grace_period,
TP_PROTO(const char *rcuname, unsigned long gp_seq, const char *gpevent),
TP_ARGS(rcuname, gp_seq, gpevent),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(long, gp_seq)
__field(const char *, gpevent)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->gp_seq = (long)gp_seq;
__entry->gpevent = gpevent;
),
TP_printk("%s %ld %s",
__entry->rcuname, __entry->gp_seq, __entry->gpevent)
);
/*
* Tracepoint for future grace-period events. The caller should pull
* the data from the rcu_node structure, other than rcuname, which comes
* from the rcu_state structure, and event, which is one of the following:
*
* "Cleanup": Clean up rcu_node structure after previous GP.
* "CleanupMore": Clean up, and another GP is needed.
* "EndWait": Complete wait.
* "NoGPkthread": The RCU grace-period kthread has not yet started.
* "Prestarted": Someone beat us to the request
* "Startedleaf": Leaf node marked for future GP.
* "Startedleafroot": All nodes from leaf to root marked for future GP.
* "Startedroot": Requested a nocb grace period based on root-node data.
* "Startleaf": Request a grace period based on leaf-node data.
* "StartWait": Start waiting for the requested grace period.
*/
TRACE_EVENT_RCU(rcu_future_grace_period,
TP_PROTO(const char *rcuname, unsigned long gp_seq,
unsigned long gp_seq_req, u8 level, int grplo, int grphi,
const char *gpevent),
TP_ARGS(rcuname, gp_seq, gp_seq_req, level, grplo, grphi, gpevent),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(long, gp_seq)
__field(long, gp_seq_req)
__field(u8, level)
__field(int, grplo)
__field(int, grphi)
__field(const char *, gpevent)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->gp_seq = (long)gp_seq;
__entry->gp_seq_req = (long)gp_seq_req;
__entry->level = level;
__entry->grplo = grplo;
__entry->grphi = grphi;
__entry->gpevent = gpevent;
),
TP_printk("%s %ld %ld %u %d %d %s",
__entry->rcuname, (long)__entry->gp_seq, (long)__entry->gp_seq_req, __entry->level,
__entry->grplo, __entry->grphi, __entry->gpevent)
);
/*
* Tracepoint for grace-period-initialization events. These are
* distinguished by the type of RCU, the new grace-period number, the
* rcu_node structure level, the starting and ending CPU covered by the
* rcu_node structure, and the mask of CPUs that will be waited for.
* All but the type of RCU are extracted from the rcu_node structure.
*/
TRACE_EVENT_RCU(rcu_grace_period_init,
TP_PROTO(const char *rcuname, unsigned long gp_seq, u8 level,
int grplo, int grphi, unsigned long qsmask),
TP_ARGS(rcuname, gp_seq, level, grplo, grphi, qsmask),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(long, gp_seq)
__field(u8, level)
__field(int, grplo)
__field(int, grphi)
__field(unsigned long, qsmask)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->gp_seq = (long)gp_seq;
__entry->level = level;
__entry->grplo = grplo;
__entry->grphi = grphi;
__entry->qsmask = qsmask;
),
TP_printk("%s %ld %u %d %d %lx",
__entry->rcuname, __entry->gp_seq, __entry->level,
__entry->grplo, __entry->grphi, __entry->qsmask)
);
/*
* Tracepoint for expedited grace-period events. Takes a string identifying
* the RCU flavor, the expedited grace-period sequence number, and a string
* identifying the grace-period-related event as follows:
*
* "snap": Captured snapshot of expedited grace period sequence number.
* "start": Started a real expedited grace period.
* "reset": Started resetting the tree
* "select": Started selecting the CPUs to wait on.
* "selectofl": Selected CPU partially offline.
* "startwait": Started waiting on selected CPUs.
* "end": Ended a real expedited grace period.
* "endwake": Woke piggybackers up.
* "done": Someone else did the expedited grace period for us.
*/
TRACE_EVENT_RCU(rcu_exp_grace_period,
TP_PROTO(const char *rcuname, unsigned long gpseq, const char *gpevent),
TP_ARGS(rcuname, gpseq, gpevent),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(long, gpseq)
__field(const char *, gpevent)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->gpseq = (long)gpseq;
__entry->gpevent = gpevent;
),
TP_printk("%s %ld %s",
__entry->rcuname, __entry->gpseq, __entry->gpevent)
);
/*
* Tracepoint for expedited grace-period funnel-locking events. Takes a
* string identifying the RCU flavor, an integer identifying the rcu_node
* combining-tree level, another pair of integers identifying the lowest-
* and highest-numbered CPU associated with the current rcu_node structure,
* and a string. identifying the grace-period-related event as follows:
*
* "nxtlvl": Advance to next level of rcu_node funnel
* "wait": Wait for someone else to do expedited GP
*/
TRACE_EVENT_RCU(rcu_exp_funnel_lock,
TP_PROTO(const char *rcuname, u8 level, int grplo, int grphi,
const char *gpevent),
TP_ARGS(rcuname, level, grplo, grphi, gpevent),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(u8, level)
__field(int, grplo)
__field(int, grphi)
__field(const char *, gpevent)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->level = level;
__entry->grplo = grplo;
__entry->grphi = grphi;
__entry->gpevent = gpevent;
),
TP_printk("%s %d %d %d %s",
__entry->rcuname, __entry->level, __entry->grplo,
__entry->grphi, __entry->gpevent)
);
#ifdef CONFIG_RCU_NOCB_CPU
/*
* Tracepoint for RCU no-CBs CPU callback handoffs. This event is intended
* to assist debugging of these handoffs.
*
* The first argument is the name of the RCU flavor, and the second is
* the number of the offloaded CPU are extracted. The third and final
* argument is a string as follows:
*
* "AlreadyAwake": The to-be-awakened rcuo kthread is already awake.
* "Bypass": rcuo GP kthread sees non-empty ->nocb_bypass.
* "CBSleep": rcuo CB kthread sleeping waiting for CBs.
* "Check": rcuo GP kthread checking specified CPU for work.
* "DeferredWake": Timer expired or polled check, time to wake.
* "DoWake": The to-be-awakened rcuo kthread needs to be awakened.
* "EndSleep": Done waiting for GP for !rcu_nocb_poll.
* "FirstBQ": New CB to empty ->nocb_bypass (->cblist maybe non-empty).
* "FirstBQnoWake": FirstBQ plus rcuo kthread need not be awakened.
* "FirstBQwake": FirstBQ plus rcuo kthread must be awakened.
* "FirstQ": New CB to empty ->cblist (->nocb_bypass maybe non-empty).
* "NeedWaitGP": rcuo GP kthread must wait on a grace period.
* "Poll": Start of new polling cycle for rcu_nocb_poll.
* "Sleep": Sleep waiting for GP for !rcu_nocb_poll.
* "Timer": Deferred-wake timer expired.
* "WakeEmptyIsDeferred": Wake rcuo kthread later, first CB to empty list.
* "WakeEmpty": Wake rcuo kthread, first CB to empty list.
* "WakeNot": Don't wake rcuo kthread.
* "WakeNotPoll": Don't wake rcuo kthread because it is polling.
* "WakeOvfIsDeferred": Wake rcuo kthread later, CB list is huge.
* "WokeEmpty": rcuo CB kthread woke to find empty list.
*/
TRACE_EVENT_RCU(rcu_nocb_wake,
TP_PROTO(const char *rcuname, int cpu, const char *reason),
TP_ARGS(rcuname, cpu, reason),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(int, cpu)
__field(const char *, reason)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->cpu = cpu;
__entry->reason = reason;
),
TP_printk("%s %d %s", __entry->rcuname, __entry->cpu, __entry->reason)
);
#endif
/*
* Tracepoint for tasks blocking within preemptible-RCU read-side
* critical sections. Track the type of RCU (which one day might
* include SRCU), the grace-period number that the task is blocking
* (the current or the next), and the task's PID.
*/
TRACE_EVENT_RCU(rcu_preempt_task,
TP_PROTO(const char *rcuname, int pid, unsigned long gp_seq),
TP_ARGS(rcuname, pid, gp_seq),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(long, gp_seq)
__field(int, pid)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->gp_seq = (long)gp_seq;
__entry->pid = pid;
),
TP_printk("%s %ld %d",
__entry->rcuname, __entry->gp_seq, __entry->pid)
);
/*
* Tracepoint for tasks that blocked within a given preemptible-RCU
* read-side critical section exiting that critical section. Track the
* type of RCU (which one day might include SRCU) and the task's PID.
*/
TRACE_EVENT_RCU(rcu_unlock_preempted_task,
TP_PROTO(const char *rcuname, unsigned long gp_seq, int pid),
TP_ARGS(rcuname, gp_seq, pid),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(long, gp_seq)
__field(int, pid)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->gp_seq = (long)gp_seq;
__entry->pid = pid;
),
TP_printk("%s %ld %d", __entry->rcuname, __entry->gp_seq, __entry->pid)
);
/*
* Tracepoint for quiescent-state-reporting events. These are
* distinguished by the type of RCU, the grace-period number, the
* mask of quiescent lower-level entities, the rcu_node structure level,
* the starting and ending CPU covered by the rcu_node structure, and
* whether there are any blocked tasks blocking the current grace period.
* All but the type of RCU are extracted from the rcu_node structure.
*/
TRACE_EVENT_RCU(rcu_quiescent_state_report,
TP_PROTO(const char *rcuname, unsigned long gp_seq,
unsigned long mask, unsigned long qsmask,
u8 level, int grplo, int grphi, int gp_tasks),
TP_ARGS(rcuname, gp_seq, mask, qsmask, level, grplo, grphi, gp_tasks),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(long, gp_seq)
__field(unsigned long, mask)
__field(unsigned long, qsmask)
__field(u8, level)
__field(int, grplo)
__field(int, grphi)
__field(u8, gp_tasks)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->gp_seq = (long)gp_seq;
__entry->mask = mask;
__entry->qsmask = qsmask;
__entry->level = level;
__entry->grplo = grplo;
__entry->grphi = grphi;
__entry->gp_tasks = gp_tasks;
),
TP_printk("%s %ld %lx>%lx %u %d %d %u",
__entry->rcuname, __entry->gp_seq,
__entry->mask, __entry->qsmask, __entry->level,
__entry->grplo, __entry->grphi, __entry->gp_tasks)
);
/*
* Tracepoint for quiescent states detected by force_quiescent_state().
* These trace events include the type of RCU, the grace-period number
* that was blocked by the CPU, the CPU itself, and the type of quiescent
* state, which can be "dti" for dyntick-idle mode or "kick" when kicking
* a CPU that has been in dyntick-idle mode for too long.
*/
TRACE_EVENT_RCU(rcu_fqs,
TP_PROTO(const char *rcuname, unsigned long gp_seq, int cpu, const char *qsevent),
TP_ARGS(rcuname, gp_seq, cpu, qsevent),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(long, gp_seq)
__field(int, cpu)
__field(const char *, qsevent)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->gp_seq = (long)gp_seq;
__entry->cpu = cpu;
__entry->qsevent = qsevent;
),
TP_printk("%s %ld %d %s",
__entry->rcuname, __entry->gp_seq,
__entry->cpu, __entry->qsevent)
);
/*
* Tracepoint for RCU stall events. Takes a string identifying the RCU flavor
* and a string identifying which function detected the RCU stall as follows:
*
* "StallDetected": Scheduler-tick detects other CPU's stalls.
* "SelfDetected": Scheduler-tick detects a current CPU's stall.
* "ExpeditedStall": Expedited grace period detects stalls.
*/
TRACE_EVENT(rcu_stall_warning,
TP_PROTO(const char *rcuname, const char *msg),
TP_ARGS(rcuname, msg),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(const char *, msg)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->msg = msg;
),
TP_printk("%s %s",
__entry->rcuname, __entry->msg)
);
#endif /* #if defined(CONFIG_TREE_RCU) */
/*
* Tracepoint for dyntick-idle entry/exit events. These take 2 strings
* as argument:
* polarity: "Start", "End", "StillNonIdle" for entering, exiting or still not
* being in dyntick-idle mode.
* context: "USER" or "IDLE" or "IRQ".
* NMIs nested in IRQs are inferred with dynticks_nesting > 1 in IRQ context.
*
* These events also take a pair of numbers, which indicate the nesting
* depth before and after the event of interest, and a third number that is
* the ->dynticks counter. Note that task-related and interrupt-related
* events use two separate counters, and that the "++=" and "--=" events
* for irq/NMI will change the counter by two, otherwise by one.
*/
TRACE_EVENT_RCU(rcu_dyntick,
TP_PROTO(const char *polarity, long oldnesting, long newnesting, int dynticks),
TP_ARGS(polarity, oldnesting, newnesting, dynticks),
TP_STRUCT__entry(
__field(const char *, polarity)
__field(long, oldnesting)
__field(long, newnesting)
__field(int, dynticks)
),
TP_fast_assign(
__entry->polarity = polarity;
__entry->oldnesting = oldnesting;
__entry->newnesting = newnesting;
__entry->dynticks = dynticks;
),
TP_printk("%s %lx %lx %#3x", __entry->polarity,
__entry->oldnesting, __entry->newnesting,
__entry->dynticks & 0xfff)
);
/*
* Tracepoint for the registration of a single RCU callback function.
* The first argument is the type of RCU, the second argument is
* a pointer to the RCU callback itself, the third element is the
* number of lazy callbacks queued, and the fourth element is the
* total number of callbacks queued.
*/
TRACE_EVENT_RCU(rcu_callback,
TP_PROTO(const char *rcuname, struct rcu_head *rhp, long qlen),
TP_ARGS(rcuname, rhp, qlen),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(void *, rhp)
__field(void *, func)
__field(long, qlen)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->rhp = rhp;
__entry->func = rhp->func;
__entry->qlen = qlen;
),
TP_printk("%s rhp=%p func=%ps %ld",
__entry->rcuname, __entry->rhp, __entry->func,
__entry->qlen)
);
TRACE_EVENT_RCU(rcu_segcb_stats,
TP_PROTO(struct rcu_segcblist *rs, const char *ctx),
TP_ARGS(rs, ctx),
TP_STRUCT__entry(
__field(const char *, ctx)
__array(unsigned long, gp_seq, RCU_CBLIST_NSEGS)
__array(long, seglen, RCU_CBLIST_NSEGS)
),
TP_fast_assign(
__entry->ctx = ctx;
memcpy(__entry->seglen, rs->seglen, RCU_CBLIST_NSEGS * sizeof(long));
memcpy(__entry->gp_seq, rs->gp_seq, RCU_CBLIST_NSEGS * sizeof(unsigned long));
),
TP_printk("%s seglen: (DONE=%ld, WAIT=%ld, NEXT_READY=%ld, NEXT=%ld) "
"gp_seq: (DONE=%lu, WAIT=%lu, NEXT_READY=%lu, NEXT=%lu)", __entry->ctx,
__entry->seglen[0], __entry->seglen[1], __entry->seglen[2], __entry->seglen[3],
__entry->gp_seq[0], __entry->gp_seq[1], __entry->gp_seq[2], __entry->gp_seq[3])
);
/*
* Tracepoint for the registration of a single RCU callback of the special
* kvfree() form. The first argument is the RCU type, the second argument
* is a pointer to the RCU callback, the third argument is the offset
* of the callback within the enclosing RCU-protected data structure,
* the fourth argument is the number of lazy callbacks queued, and the
* fifth argument is the total number of callbacks queued.
*/
TRACE_EVENT_RCU(rcu_kvfree_callback,
TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset,
long qlen),
TP_ARGS(rcuname, rhp, offset, qlen),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(void *, rhp)
__field(unsigned long, offset)
__field(long, qlen)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->rhp = rhp;
__entry->offset = offset;
__entry->qlen = qlen;
),
TP_printk("%s rhp=%p func=%ld %ld",
__entry->rcuname, __entry->rhp, __entry->offset,
__entry->qlen)
);
/*
* Tracepoint for marking the beginning rcu_do_batch, performed to start
* RCU callback invocation. The first argument is the RCU flavor,
* the second is the number of lazy callbacks queued, the third is
* the total number of callbacks queued, and the fourth argument is
* the current RCU-callback batch limit.
*/
TRACE_EVENT_RCU(rcu_batch_start,
TP_PROTO(const char *rcuname, long qlen, long blimit),
TP_ARGS(rcuname, qlen, blimit),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(long, qlen)
__field(long, blimit)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->qlen = qlen;
__entry->blimit = blimit;
),
TP_printk("%s CBs=%ld bl=%ld",
__entry->rcuname, __entry->qlen, __entry->blimit)
);
/*
* Tracepoint for the invocation of a single RCU callback function.
* The first argument is the type of RCU, and the second argument is
* a pointer to the RCU callback itself.
*/
TRACE_EVENT_RCU(rcu_invoke_callback,
TP_PROTO(const char *rcuname, struct rcu_head *rhp),
TP_ARGS(rcuname, rhp),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(void *, rhp)
__field(void *, func)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->rhp = rhp;
__entry->func = rhp->func;
),
TP_printk("%s rhp=%p func=%ps",
__entry->rcuname, __entry->rhp, __entry->func)
);
/*
* Tracepoint for the invocation of a single RCU callback of the special
* kvfree() form. The first argument is the RCU flavor, the second
* argument is a pointer to the RCU callback, and the third argument
* is the offset of the callback within the enclosing RCU-protected
* data structure.
*/
TRACE_EVENT_RCU(rcu_invoke_kvfree_callback,
TP_PROTO(const char *rcuname, struct rcu_head *rhp, unsigned long offset),
TP_ARGS(rcuname, rhp, offset),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(void *, rhp)
__field(unsigned long, offset)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->rhp = rhp;
__entry->offset = offset;
),
TP_printk("%s rhp=%p func=%ld",
__entry->rcuname, __entry->rhp, __entry->offset)
);
/*
* Tracepoint for the invocation of a single RCU callback of the special
* kfree_bulk() form. The first argument is the RCU flavor, the second
* argument is a number of elements in array to free, the third is an
* address of the array holding nr_records entries.
*/
TRACE_EVENT_RCU(rcu_invoke_kfree_bulk_callback,
TP_PROTO(const char *rcuname, unsigned long nr_records, void **p),
TP_ARGS(rcuname, nr_records, p),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(unsigned long, nr_records)
__field(void **, p)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->nr_records = nr_records;
__entry->p = p;
),
TP_printk("%s bulk=0x%p nr_records=%lu",
__entry->rcuname, __entry->p, __entry->nr_records)
);
/*
* Tracepoint for exiting rcu_do_batch after RCU callbacks have been
* invoked. The first argument is the name of the RCU flavor,
* the second argument is number of callbacks actually invoked,
* the third argument (cb) is whether or not any of the callbacks that
* were ready to invoke at the beginning of this batch are still
* queued, the fourth argument (nr) is the return value of need_resched(),
* the fifth argument (iit) is 1 if the current task is the idle task,
* and the sixth argument (risk) is the return value from
* rcu_is_callbacks_kthread().
*/
TRACE_EVENT_RCU(rcu_batch_end,
TP_PROTO(const char *rcuname, int callbacks_invoked,
char cb, char nr, char iit, char risk),
TP_ARGS(rcuname, callbacks_invoked, cb, nr, iit, risk),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(int, callbacks_invoked)
__field(char, cb)
__field(char, nr)
__field(char, iit)
__field(char, risk)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->callbacks_invoked = callbacks_invoked;
__entry->cb = cb;
__entry->nr = nr;
__entry->iit = iit;
__entry->risk = risk;
),
TP_printk("%s CBs-invoked=%d idle=%c%c%c%c",
__entry->rcuname, __entry->callbacks_invoked,
__entry->cb ? 'C' : '.',
__entry->nr ? 'S' : '.',
__entry->iit ? 'I' : '.',
__entry->risk ? 'R' : '.')
);
/*
* Tracepoint for rcutorture readers. The first argument is the name
* of the RCU flavor from rcutorture's viewpoint and the second argument
* is the callback address. The third argument is the start time in
* seconds, and the last two arguments are the grace period numbers
* at the beginning and end of the read, respectively. Note that the
* callback address can be NULL.
*/
#define RCUTORTURENAME_LEN 8
TRACE_EVENT_RCU(rcu_torture_read,
TP_PROTO(const char *rcutorturename, struct rcu_head *rhp,
unsigned long secs, unsigned long c_old, unsigned long c),
TP_ARGS(rcutorturename, rhp, secs, c_old, c),
TP_STRUCT__entry(
__field(char, rcutorturename[RCUTORTURENAME_LEN])
__field(struct rcu_head *, rhp)
__field(unsigned long, secs)
__field(unsigned long, c_old)
__field(unsigned long, c)
),
TP_fast_assign(
strncpy(__entry->rcutorturename, rcutorturename,
RCUTORTURENAME_LEN);
__entry->rcutorturename[RCUTORTURENAME_LEN - 1] = 0;
__entry->rhp = rhp;
__entry->secs = secs;
__entry->c_old = c_old;
__entry->c = c;
),
TP_printk("%s torture read %p %luus c: %lu %lu",
__entry->rcutorturename, __entry->rhp,
__entry->secs, __entry->c_old, __entry->c)
);
/*
* Tracepoint for rcu_barrier() execution. The string "s" describes
* the rcu_barrier phase:
* "Begin": rcu_barrier() started.
* "EarlyExit": rcu_barrier() piggybacked, thus early exit.
* "Inc1": rcu_barrier() piggyback check counter incremented.
* "OfflineNoCBQ": rcu_barrier() found offline no-CBs CPU with callbacks.
* "OnlineQ": rcu_barrier() found online CPU with callbacks.
* "OnlineNQ": rcu_barrier() found online CPU, no callbacks.
* "IRQ": An rcu_barrier_callback() callback posted on remote CPU.
* "IRQNQ": An rcu_barrier_callback() callback found no callbacks.
* "CB": An rcu_barrier_callback() invoked a callback, not the last.
* "LastCB": An rcu_barrier_callback() invoked the last callback.
* "Inc2": rcu_barrier() piggyback check counter incremented.
* The "cpu" argument is the CPU or -1 if meaningless, the "cnt" argument
* is the count of remaining callbacks, and "done" is the piggybacking count.
*/
TRACE_EVENT_RCU(rcu_barrier,
TP_PROTO(const char *rcuname, const char *s, int cpu, int cnt, unsigned long done),
TP_ARGS(rcuname, s, cpu, cnt, done),
TP_STRUCT__entry(
__field(const char *, rcuname)
__field(const char *, s)
__field(int, cpu)
__field(int, cnt)
__field(unsigned long, done)
),
TP_fast_assign(
__entry->rcuname = rcuname;
__entry->s = s;
__entry->cpu = cpu;
__entry->cnt = cnt;
__entry->done = done;
),
TP_printk("%s %s cpu %d remaining %d # %lu",
__entry->rcuname, __entry->s, __entry->cpu, __entry->cnt,
__entry->done)
);
#endif /* _TRACE_RCU_H */
/* This part must be outside protection */
#include <trace/define_trace.h>
|