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840 lines
24 KiB
840 lines
24 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#undef TRACE_SYSTEM |
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#define TRACE_SYSTEM rcu |
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#if !defined(_TRACE_RCU_H) || defined(TRACE_HEADER_MULTI_READ) |
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#define _TRACE_RCU_H |
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#include <linux/tracepoint.h> |
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#ifdef CONFIG_RCU_TRACE |
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#define TRACE_EVENT_RCU TRACE_EVENT |
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#else |
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#define TRACE_EVENT_RCU TRACE_EVENT_NOP |
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#endif |
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/* |
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* Tracepoint for start/end markers used for utilization calculations. |
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* By convention, the string is of the following forms: |
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* |
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* "Start <activity>" -- Mark the start of the specified activity, |
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* such as "context switch". Nesting is permitted. |
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* "End <activity>" -- Mark the end of the specified activity. |
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* |
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* An "@" character within "<activity>" is a comment character: Data |
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* reduction scripts will ignore the "@" and the remainder of the line. |
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*/ |
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TRACE_EVENT(rcu_utilization, |
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TP_PROTO(const char *s), |
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TP_ARGS(s), |
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TP_STRUCT__entry( |
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__field(const char *, s) |
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), |
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TP_fast_assign( |
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__entry->s = s; |
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), |
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TP_printk("%s", __entry->s) |
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); |
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#if defined(CONFIG_TREE_RCU) |
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/* |
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* Tracepoint for grace-period events. Takes a string identifying the |
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* RCU flavor, the grace-period number, and a string identifying the |
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* grace-period-related event as follows: |
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* |
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* "AccReadyCB": CPU accelerates new callbacks to RCU_NEXT_READY_TAIL. |
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* "AccWaitCB": CPU accelerates new callbacks to RCU_WAIT_TAIL. |
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* "newreq": Request a new grace period. |
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* "start": Start a grace period. |
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* "cpustart": CPU first notices a grace-period start. |
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* "cpuqs": CPU passes through a quiescent state. |
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* "cpuonl": CPU comes online. |
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* "cpuofl": CPU goes offline. |
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* "cpuofl-bgp": CPU goes offline while blocking a grace period. |
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* "reqwait": GP kthread sleeps waiting for grace-period request. |
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* "reqwaitsig": GP kthread awakened by signal from reqwait state. |
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* "fqswait": GP kthread waiting until time to force quiescent states. |
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* "fqsstart": GP kthread starts forcing quiescent states. |
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* "fqsend": GP kthread done forcing quiescent states. |
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* "fqswaitsig": GP kthread awakened by signal from fqswait state. |
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* "end": End a grace period. |
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* "cpuend": CPU first notices a grace-period end. |
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*/ |
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TRACE_EVENT_RCU(rcu_grace_period, |
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TP_PROTO(const char *rcuname, unsigned long gp_seq, const char *gpevent), |
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TP_ARGS(rcuname, gp_seq, gpevent), |
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TP_STRUCT__entry( |
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__field(const char *, rcuname) |
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__field(long, gp_seq) |
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__field(const char *, gpevent) |
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), |
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TP_fast_assign( |
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__entry->rcuname = rcuname; |
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__entry->gp_seq = (long)gp_seq; |
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__entry->gpevent = gpevent; |
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), |
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TP_printk("%s %ld %s", |
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__entry->rcuname, __entry->gp_seq, __entry->gpevent) |
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); |
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/* |
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* Tracepoint for future grace-period events. The caller should pull |
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* the data from the rcu_node structure, other than rcuname, which comes |
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* from the rcu_state structure, and event, which is one of the following: |
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* |
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* "Cleanup": Clean up rcu_node structure after previous GP. |
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* "CleanupMore": Clean up, and another GP is needed. |
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* "EndWait": Complete wait. |
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* "NoGPkthread": The RCU grace-period kthread has not yet started. |
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* "Prestarted": Someone beat us to the request |
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* "Startedleaf": Leaf node marked for future GP. |
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* "Startedleafroot": All nodes from leaf to root marked for future GP. |
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* "Startedroot": Requested a nocb grace period based on root-node data. |
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* "Startleaf": Request a grace period based on leaf-node data. |
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* "StartWait": Start waiting for the requested grace period. |
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*/ |
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TRACE_EVENT_RCU(rcu_future_grace_period, |
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TP_PROTO(const char *rcuname, unsigned long gp_seq, |
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unsigned long gp_seq_req, u8 level, int grplo, int grphi, |
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const char *gpevent), |
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TP_ARGS(rcuname, gp_seq, gp_seq_req, level, grplo, grphi, gpevent), |
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TP_STRUCT__entry( |
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__field(const char *, rcuname) |
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__field(long, gp_seq) |
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__field(long, gp_seq_req) |
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__field(u8, level) |
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__field(int, grplo) |
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__field(int, grphi) |
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__field(const char *, gpevent) |
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), |
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TP_fast_assign( |
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__entry->rcuname = rcuname; |
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__entry->gp_seq = (long)gp_seq; |
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__entry->gp_seq_req = (long)gp_seq_req; |
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__entry->level = level; |
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__entry->grplo = grplo; |
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__entry->grphi = grphi; |
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__entry->gpevent = gpevent; |
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), |
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TP_printk("%s %ld %ld %u %d %d %s", |
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__entry->rcuname, (long)__entry->gp_seq, (long)__entry->gp_seq_req, __entry->level, |
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__entry->grplo, __entry->grphi, __entry->gpevent) |
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); |
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/* |
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* Tracepoint for grace-period-initialization events. These are |
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* distinguished by the type of RCU, the new grace-period number, the |
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* rcu_node structure level, the starting and ending CPU covered by the |
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* rcu_node structure, and the mask of CPUs that will be waited for. |
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* All but the type of RCU are extracted from the rcu_node structure. |
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*/ |
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TRACE_EVENT_RCU(rcu_grace_period_init, |
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TP_PROTO(const char *rcuname, unsigned long gp_seq, u8 level, |
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int grplo, int grphi, unsigned long qsmask), |
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TP_ARGS(rcuname, gp_seq, level, grplo, grphi, qsmask), |
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TP_STRUCT__entry( |
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__field(const char *, rcuname) |
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__field(long, gp_seq) |
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__field(u8, level) |
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__field(int, grplo) |
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__field(int, grphi) |
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__field(unsigned long, qsmask) |
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), |
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TP_fast_assign( |
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__entry->rcuname = rcuname; |
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__entry->gp_seq = (long)gp_seq; |
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__entry->level = level; |
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__entry->grplo = grplo; |
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__entry->grphi = grphi; |
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__entry->qsmask = qsmask; |
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), |
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TP_printk("%s %ld %u %d %d %lx", |
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__entry->rcuname, __entry->gp_seq, __entry->level, |
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__entry->grplo, __entry->grphi, __entry->qsmask) |
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); |
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/* |
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* Tracepoint for expedited grace-period events. Takes a string identifying |
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* the RCU flavor, the expedited grace-period sequence number, and a string |
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* identifying the grace-period-related event as follows: |
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* |
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* "snap": Captured snapshot of expedited grace period sequence number. |
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* "start": Started a real expedited grace period. |
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* "reset": Started resetting the tree |
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* "select": Started selecting the CPUs to wait on. |
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* "selectofl": Selected CPU partially offline. |
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* "startwait": Started waiting on selected CPUs. |
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* "end": Ended a real expedited grace period. |
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* "endwake": Woke piggybackers up. |
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* "done": Someone else did the expedited grace period for us. |
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*/ |
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TRACE_EVENT_RCU(rcu_exp_grace_period, |
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TP_PROTO(const char *rcuname, unsigned long gpseq, const char *gpevent), |
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TP_ARGS(rcuname, gpseq, gpevent), |
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TP_STRUCT__entry( |
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__field(const char *, rcuname) |
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__field(long, gpseq) |
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__field(const char *, gpevent) |
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), |
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TP_fast_assign( |
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__entry->rcuname = rcuname; |
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__entry->gpseq = (long)gpseq; |
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__entry->gpevent = gpevent; |
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), |
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TP_printk("%s %ld %s", |
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__entry->rcuname, __entry->gpseq, __entry->gpevent) |
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); |
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/* |
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* Tracepoint for expedited grace-period funnel-locking events. Takes a |
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* string identifying the RCU flavor, an integer identifying the rcu_node |
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* combining-tree level, another pair of integers identifying the lowest- |
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* and highest-numbered CPU associated with the current rcu_node structure, |
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* and a string. identifying the grace-period-related event as follows: |
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* |
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* "nxtlvl": Advance to next level of rcu_node funnel |
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* "wait": Wait for someone else to do expedited GP |
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*/ |
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TRACE_EVENT_RCU(rcu_exp_funnel_lock, |
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TP_PROTO(const char *rcuname, u8 level, int grplo, int grphi, |
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const char *gpevent), |
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TP_ARGS(rcuname, level, grplo, grphi, gpevent), |
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TP_STRUCT__entry( |
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__field(const char *, rcuname) |
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__field(u8, level) |
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__field(int, grplo) |
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__field(int, grphi) |
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__field(const char *, gpevent) |
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), |
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TP_fast_assign( |
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__entry->rcuname = rcuname; |
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__entry->level = level; |
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__entry->grplo = grplo; |
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__entry->grphi = grphi; |
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__entry->gpevent = gpevent; |
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), |
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TP_printk("%s %d %d %d %s", |
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__entry->rcuname, __entry->level, __entry->grplo, |
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__entry->grphi, __entry->gpevent) |
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); |
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#ifdef CONFIG_RCU_NOCB_CPU |
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/* |
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* Tracepoint for RCU no-CBs CPU callback handoffs. This event is intended |
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* to assist debugging of these handoffs. |
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* |
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* The first argument is the name of the RCU flavor, and the second is |
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* the number of the offloaded CPU are extracted. The third and final |
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* argument is a string as follows: |
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* |
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* "AlreadyAwake": The to-be-awakened rcuo kthread is already awake. |
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* "Bypass": rcuo GP kthread sees non-empty ->nocb_bypass. |
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* "CBSleep": rcuo CB kthread sleeping waiting for CBs. |
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* "Check": rcuo GP kthread checking specified CPU for work. |
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* "DeferredWake": Timer expired or polled check, time to wake. |
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* "DoWake": The to-be-awakened rcuo kthread needs to be awakened. |
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* "EndSleep": Done waiting for GP for !rcu_nocb_poll. |
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* "FirstBQ": New CB to empty ->nocb_bypass (->cblist maybe non-empty). |
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* "FirstBQnoWake": FirstBQ plus rcuo kthread need not be awakened. |
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* "FirstBQwake": FirstBQ plus rcuo kthread must be awakened. |
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* "FirstQ": New CB to empty ->cblist (->nocb_bypass maybe non-empty). |
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* "NeedWaitGP": rcuo GP kthread must wait on a grace period. |
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* "Poll": Start of new polling cycle for rcu_nocb_poll. |
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* "Sleep": Sleep waiting for GP for !rcu_nocb_poll. |
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* "Timer": Deferred-wake timer expired. |
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* "WakeEmptyIsDeferred": Wake rcuo kthread later, first CB to empty list. |
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* "WakeEmpty": Wake rcuo kthread, first CB to empty list. |
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* "WakeNot": Don't wake rcuo kthread. |
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* "WakeNotPoll": Don't wake rcuo kthread because it is polling. |
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* "WakeOvfIsDeferred": Wake rcuo kthread later, CB list is huge. |
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* "WakeBypassIsDeferred": Wake rcuo kthread later, bypass list is contended. |
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* "WokeEmpty": rcuo CB kthread woke to find empty list. |
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*/ |
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TRACE_EVENT_RCU(rcu_nocb_wake, |
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TP_PROTO(const char *rcuname, int cpu, const char *reason), |
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TP_ARGS(rcuname, cpu, reason), |
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TP_STRUCT__entry( |
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__field(const char *, rcuname) |
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__field(int, cpu) |
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__field(const char *, reason) |
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), |
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TP_fast_assign( |
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__entry->rcuname = rcuname; |
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__entry->cpu = cpu; |
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__entry->reason = reason; |
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), |
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TP_printk("%s %d %s", __entry->rcuname, __entry->cpu, __entry->reason) |
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); |
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#endif |
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/* |
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* Tracepoint for tasks blocking within preemptible-RCU read-side |
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* critical sections. Track the type of RCU (which one day might |
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* include SRCU), the grace-period number that the task is blocking |
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* (the current or the next), and the task's PID. |
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*/ |
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TRACE_EVENT_RCU(rcu_preempt_task, |
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TP_PROTO(const char *rcuname, int pid, unsigned long gp_seq), |
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TP_ARGS(rcuname, pid, gp_seq), |
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TP_STRUCT__entry( |
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__field(const char *, rcuname) |
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__field(long, gp_seq) |
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__field(int, pid) |
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), |
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TP_fast_assign( |
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__entry->rcuname = rcuname; |
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__entry->gp_seq = (long)gp_seq; |
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__entry->pid = pid; |
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), |
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TP_printk("%s %ld %d", |
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__entry->rcuname, __entry->gp_seq, __entry->pid) |
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); |
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/* |
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* Tracepoint for tasks that blocked within a given preemptible-RCU |
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* read-side critical section exiting that critical section. Track the |
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* type of RCU (which one day might include SRCU) and the task's PID. |
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*/ |
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TRACE_EVENT_RCU(rcu_unlock_preempted_task, |
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TP_PROTO(const char *rcuname, unsigned long gp_seq, int pid), |
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TP_ARGS(rcuname, gp_seq, pid), |
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TP_STRUCT__entry( |
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__field(const char *, rcuname) |
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__field(long, gp_seq) |
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__field(int, pid) |
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), |
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TP_fast_assign( |
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__entry->rcuname = rcuname; |
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__entry->gp_seq = (long)gp_seq; |
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__entry->pid = pid; |
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), |
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TP_printk("%s %ld %d", __entry->rcuname, __entry->gp_seq, __entry->pid) |
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); |
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/* |
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* Tracepoint for quiescent-state-reporting events. These are |
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* distinguished by the type of RCU, the grace-period number, the |
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* mask of quiescent lower-level entities, the rcu_node structure level, |
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* the starting and ending CPU covered by the rcu_node structure, and |
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* whether there are any blocked tasks blocking the current grace period. |
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* All but the type of RCU are extracted from the rcu_node structure. |
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*/ |
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TRACE_EVENT_RCU(rcu_quiescent_state_report, |
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TP_PROTO(const char *rcuname, unsigned long gp_seq, |
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unsigned long mask, unsigned long qsmask, |
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u8 level, int grplo, int grphi, int gp_tasks), |
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TP_ARGS(rcuname, gp_seq, mask, qsmask, level, grplo, grphi, gp_tasks), |
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TP_STRUCT__entry( |
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__field(const char *, rcuname) |
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__field(long, gp_seq) |
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__field(unsigned long, mask) |
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__field(unsigned long, qsmask) |
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__field(u8, level) |
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__field(int, grplo) |
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__field(int, grphi) |
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__field(u8, gp_tasks) |
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), |
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TP_fast_assign( |
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__entry->rcuname = rcuname; |
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__entry->gp_seq = (long)gp_seq; |
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__entry->mask = mask; |
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__entry->qsmask = qsmask; |
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__entry->level = level; |
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__entry->grplo = grplo; |
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__entry->grphi = grphi; |
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__entry->gp_tasks = gp_tasks; |
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), |
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TP_printk("%s %ld %lx>%lx %u %d %d %u", |
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__entry->rcuname, __entry->gp_seq, |
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__entry->mask, __entry->qsmask, __entry->level, |
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__entry->grplo, __entry->grphi, __entry->gp_tasks) |
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); |
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/* |
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* Tracepoint for quiescent states detected by force_quiescent_state(). |
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* These trace events include the type of RCU, the grace-period number |
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* that was blocked by the CPU, the CPU itself, and the type of quiescent |
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* state, which can be "dti" for dyntick-idle mode or "kick" when kicking |
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* a CPU that has been in dyntick-idle mode for too long. |
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*/ |
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TRACE_EVENT_RCU(rcu_fqs, |
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TP_PROTO(const char *rcuname, unsigned long gp_seq, int cpu, const char *qsevent), |
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TP_ARGS(rcuname, gp_seq, cpu, qsevent), |
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TP_STRUCT__entry( |
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__field(const char *, rcuname) |
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__field(long, gp_seq) |
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__field(int, cpu) |
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__field(const char *, qsevent) |
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), |
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TP_fast_assign( |
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__entry->rcuname = rcuname; |
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__entry->gp_seq = (long)gp_seq; |
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__entry->cpu = cpu; |
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__entry->qsevent = qsevent; |
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), |
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TP_printk("%s %ld %d %s", |
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__entry->rcuname, __entry->gp_seq, |
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__entry->cpu, __entry->qsevent) |
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); |
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/* |
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* Tracepoint for RCU stall events. Takes a string identifying the RCU flavor |
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* and a string identifying which function detected the RCU stall as follows: |
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* |
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* "StallDetected": Scheduler-tick detects other CPU's stalls. |
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* "SelfDetected": Scheduler-tick detects a current CPU's stall. |
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* "ExpeditedStall": Expedited grace period detects stalls. |
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*/ |
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TRACE_EVENT(rcu_stall_warning, |
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TP_PROTO(const char *rcuname, const char *msg), |
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TP_ARGS(rcuname, msg), |
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TP_STRUCT__entry( |
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__field(const char *, rcuname) |
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__field(const char *, msg) |
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), |
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TP_fast_assign( |
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__entry->rcuname = rcuname; |
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__entry->msg = msg; |
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), |
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TP_printk("%s %s", |
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__entry->rcuname, __entry->msg) |
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); |
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#endif /* #if defined(CONFIG_TREE_RCU) */ |
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/* |
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* Tracepoint for dyntick-idle entry/exit events. These take 2 strings |
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* as argument: |
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* polarity: "Start", "End", "StillNonIdle" for entering, exiting or still not |
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* being in dyntick-idle mode. |
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* context: "USER" or "IDLE" or "IRQ". |
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* NMIs nested in IRQs are inferred with dynticks_nesting > 1 in IRQ context. |
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* |
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* These events also take a pair of numbers, which indicate the nesting |
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* depth before and after the event of interest, and a third number that is |
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* the ->dynticks counter. Note that task-related and interrupt-related |
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* events use two separate counters, and that the "++=" and "--=" events |
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* for irq/NMI will change the counter by two, otherwise by one. |
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*/ |
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TRACE_EVENT_RCU(rcu_dyntick, |
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TP_PROTO(const char *polarity, long oldnesting, long newnesting, int dynticks), |
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TP_ARGS(polarity, oldnesting, newnesting, dynticks), |
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TP_STRUCT__entry( |
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__field(const char *, polarity) |
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__field(long, oldnesting) |
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__field(long, newnesting) |
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__field(int, dynticks) |
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), |
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TP_fast_assign( |
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__entry->polarity = polarity; |
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__entry->oldnesting = oldnesting; |
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__entry->newnesting = newnesting; |
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__entry->dynticks = dynticks; |
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), |
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TP_printk("%s %lx %lx %#3x", __entry->polarity, |
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__entry->oldnesting, __entry->newnesting, |
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__entry->dynticks & 0xfff) |
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); |
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|
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/* |
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* Tracepoint for the registration of a single RCU callback function. |
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* The first argument is the type of RCU, the second argument is |
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* a pointer to the RCU callback itself, the third element is the |
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* number of lazy callbacks queued, and the fourth element is the |
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* total number of callbacks queued. |
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*/ |
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TRACE_EVENT_RCU(rcu_callback, |
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TP_PROTO(const char *rcuname, struct rcu_head *rhp, long qlen), |
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TP_ARGS(rcuname, rhp, qlen), |
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TP_STRUCT__entry( |
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__field(const char *, rcuname) |
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__field(void *, rhp) |
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__field(void *, func) |
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__field(long, qlen) |
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), |
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TP_fast_assign( |
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__entry->rcuname = rcuname; |
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__entry->rhp = rhp; |
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__entry->func = rhp->func; |
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__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>
|
|
|