diff options
Diffstat (limited to 'Documentation/RCU/trace.txt')
| -rw-r--r-- | Documentation/RCU/trace.txt | 58 |
1 files changed, 42 insertions, 16 deletions
diff --git a/Documentation/RCU/trace.txt b/Documentation/RCU/trace.txt index 13dbf9bccdbf..5aefd5fa7af5 100644 --- a/Documentation/RCU/trace.txt +++ b/Documentation/RCU/trace.txt | |||
| @@ -21,23 +21,23 @@ rcu_pending() function decided that there was core RCU work to do). | |||
| 21 | The output of "cat rcu/rcudata" looks as follows: | 21 | The output of "cat rcu/rcudata" looks as follows: |
| 22 | 22 | ||
| 23 | rcu_sched: | 23 | rcu_sched: |
| 24 | 0!c=423090 g=423091 pq=1 pqc=423090 qp=1 dt=86475/1/0 df=16319 of=163 ri=1519 ql=0 b=10 ci=1460693 co=1648 ca=6448 | 24 | 0!c=423090 g=423091 pq=1 pqc=423090 qp=1 dt=86475/1/0 df=16319 of=163 ri=1519 ql=0 qs=.... b=10 ci=1460693 co=1648 ca=6448 |
| 25 | 1!c=423329 g=423330 pq=1 pqc=423329 qp=1 dt=90875/1/0 df=16231 of=157 ri=1249 ql=0 b=10 ci=1459002 co=1614 ca=3310 | 25 | 1!c=423329 g=423330 pq=1 pqc=423329 qp=1 dt=90875/1/0 df=16231 of=157 ri=1249 ql=0 qs=.... b=10 ci=1459002 co=1614 ca=3310 |
| 26 | 2!c=423370 g=423371 pq=1 pqc=423370 qp=1 dt=69661/1/0 df=16125 of=163 ri=1469 ql=0 b=10 ci=1610701 co=2015 ca=2378 | 26 | 2!c=423370 g=423371 pq=1 pqc=423370 qp=1 dt=69661/1/0 df=16125 of=163 ri=1469 ql=0 qs=.... b=10 ci=1610701 co=2015 ca=2378 |
| 27 | 3!c=422967 g=422968 pq=1 pqc=422967 qp=1 dt=70349/1/0 df=12528 of=163 ri=1450 ql=0 b=10 ci=1427543 co=1430 ca=897 | 27 | 3!c=422967 g=422968 pq=1 pqc=422967 qp=1 dt=70349/1/0 df=12528 of=163 ri=1450 ql=0 qs=.... b=10 ci=1427543 co=1430 ca=897 |
| 28 | 4!c=423196 g=423197 pq=1 pqc=423196 qp=0 dt=38935/1/0 df=10959 of=177 ri=1657 ql=0 b=10 ci=1562249 co=1896 ca=533 | 28 | 4!c=423196 g=423197 pq=1 pqc=423196 qp=0 dt=38935/1/0 df=10959 of=177 ri=1657 ql=0 qs=.... b=10 ci=1562249 co=1896 ca=533 |
| 29 | 5!c=422950 g=422951 pq=1 pqc=422950 qp=0 dt=25127/1/0 df=5895 of=167 ri=1549 ql=0 b=10 ci=1777260 co=2137 ca=274 | 29 | 5!c=422950 g=422951 pq=1 pqc=422950 qp=0 dt=25127/1/0 df=5895 of=167 ri=1549 ql=0 qs=.... b=10 ci=1777260 co=2137 ca=274 |
| 30 | 6!c=423396 g=423397 pq=1 pqc=423396 qp=1 dt=22639/1/0 df=4590 of=149 ri=1572 ql=0 b=10 ci=1471186 co=1530 ca=243 | 30 | 6!c=423396 g=423397 pq=1 pqc=423396 qp=1 dt=22639/1/0 df=4590 of=149 ri=1572 ql=0 qs=.... b=10 ci=1471186 co=1530 ca=243 |
| 31 | 7 c=460203 g=460203 pq=1 pqc=460202 qp=0 dt=937087/1/0 df=3298 of=149 ri=1584 ql=6 b=10 ci=4026154 co=1948 ca=135 | 31 | 7 c=460203 g=460203 pq=1 pqc=460202 qp=0 dt=937087/1/0 df=3298 of=149 ri=1584 ql=6 qs=N.W. b=10 ci=4026154 co=1948 ca=135 |
| 32 | rcu_bh: | 32 | rcu_bh: |
| 33 | 0!c=18446744073709551494 g=18446744073709551494 pq=0 pqc=18446744073709551493 qp=1 dt=86475/1/0 df=11 of=0 ri=0 ql=0 b=10 ci=112 co=0 ca=0 | 33 | 0!c=18446744073709551494 g=18446744073709551494 pq=0 pqc=18446744073709551493 qp=1 dt=86475/1/0 df=11 of=0 ri=0 ql=0 qs=.... b=10 ci=112 co=0 ca=0 |
| 34 | 1!c=18446744073709551496 g=18446744073709551496 pq=1 pqc=18446744073709551495 qp=0 dt=90875/1/0 df=15 of=0 ri=0 ql=0 b=10 ci=143 co=0 ca=0 | 34 | 1!c=18446744073709551496 g=18446744073709551496 pq=1 pqc=18446744073709551495 qp=0 dt=90875/1/0 df=15 of=0 ri=0 ql=0 qs=.... b=10 ci=143 co=0 ca=0 |
| 35 | 2!c=18446744073709551496 g=18446744073709551496 pq=1 pqc=18446744073709551495 qp=0 dt=69661/1/0 df=21 of=0 ri=1 ql=0 b=10 ci=88 co=0 ca=0 | 35 | 2!c=18446744073709551496 g=18446744073709551496 pq=1 pqc=18446744073709551495 qp=0 dt=69661/1/0 df=21 of=0 ri=1 ql=0 qs=.... b=10 ci=88 co=0 ca=0 |
| 36 | 3!c=18446744073709551494 g=18446744073709551494 pq=1 pqc=18446744073709551493 qp=0 dt=70349/1/0 df=13 of=0 ri=0 ql=0 b=10 ci=100 co=0 ca=0 | 36 | 3!c=18446744073709551494 g=18446744073709551494 pq=1 pqc=18446744073709551493 qp=0 dt=70349/1/0 df=13 of=0 ri=0 ql=0 qs=.... b=10 ci=100 co=0 ca=0 |
| 37 | 4!c=18446744073709551494 g=18446744073709551494 pq=0 pqc=18446744073709551493 qp=1 dt=38935/1/0 df=17 of=0 ri=0 ql=0 b=10 ci=36 co=0 ca=0 | 37 | 4!c=18446744073709551494 g=18446744073709551494 pq=0 pqc=18446744073709551493 qp=1 dt=38935/1/0 df=17 of=0 ri=0 ql=0 qs=.... b=10 ci=36 co=0 ca=0 |
| 38 | 5!c=18446744073709551494 g=18446744073709551494 pq=0 pqc=18446744073709551493 qp=1 dt=25127/1/0 df=7 of=0 ri=0 ql=0 b=10 ci=32 co=0 ca=0 | 38 | 5!c=18446744073709551494 g=18446744073709551494 pq=0 pqc=18446744073709551493 qp=1 dt=25127/1/0 df=7 of=0 ri=0 ql=0 qs=.... b=10 ci=32 co=0 ca=0 |
| 39 | 6!c=18446744073709551496 g=18446744073709551496 pq=1 pqc=18446744073709551495 qp=0 dt=22639/1/0 df=9 of=0 ri=0 ql=0 b=10 ci=44 co=0 ca=0 | 39 | 6!c=18446744073709551496 g=18446744073709551496 pq=1 pqc=18446744073709551495 qp=0 dt=22639/1/0 df=9 of=0 ri=0 ql=0 qs=.... b=10 ci=44 co=0 ca=0 |
| 40 | 7 c=182 g=182 pq=1 pqc=181 qp=0 dt=937087/1/0 df=14 of=0 ri=1 ql=0 b=10 ci=627 co=0 ca=0 | 40 | 7 c=182 g=182 pq=1 pqc=181 qp=0 dt=937087/1/0 df=14 of=0 ri=1 ql=0 qs=.... b=10 ci=627 co=0 ca=0 |
| 41 | 41 | ||
| 42 | The first section lists the rcu_data structures for rcu_sched, the second | 42 | The first section lists the rcu_data structures for rcu_sched, the second |
| 43 | for rcu_bh. Note that CONFIG_TREE_PREEMPT_RCU kernels will have an | 43 | for rcu_bh. Note that CONFIG_TREE_PREEMPT_RCU kernels will have an |
| @@ -120,6 +120,32 @@ o "ql" is the number of RCU callbacks currently residing on | |||
| 120 | of what state they are in (new, waiting for grace period to | 120 | of what state they are in (new, waiting for grace period to |
| 121 | start, waiting for grace period to end, ready to invoke). | 121 | start, waiting for grace period to end, ready to invoke). |
| 122 | 122 | ||
| 123 | o "qs" gives an indication of the state of the callback queue | ||
| 124 | with four characters: | ||
| 125 | |||
| 126 | "N" Indicates that there are callbacks queued that are not | ||
| 127 | ready to be handled by the next grace period, and thus | ||
| 128 | will be handled by the grace period following the next | ||
| 129 | one. | ||
| 130 | |||
| 131 | "R" Indicates that there are callbacks queued that are | ||
| 132 | ready to be handled by the next grace period. | ||
| 133 | |||
| 134 | "W" Indicates that there are callbacks queued that are | ||
| 135 | waiting on the current grace period. | ||
| 136 | |||
| 137 | "D" Indicates that there are callbacks queued that have | ||
| 138 | already been handled by a prior grace period, and are | ||
| 139 | thus waiting to be invoked. Note that callbacks in | ||
| 140 | the process of being invoked are not counted here. | ||
| 141 | Callbacks in the process of being invoked are those | ||
| 142 | that have been removed from the rcu_data structures | ||
| 143 | queues by rcu_do_batch(), but which have not yet been | ||
| 144 | invoked. | ||
| 145 | |||
| 146 | If there are no callbacks in a given one of the above states, | ||
| 147 | the corresponding character is replaced by ".". | ||
| 148 | |||
| 123 | o "b" is the batch limit for this CPU. If more than this number | 149 | o "b" is the batch limit for this CPU. If more than this number |
| 124 | of RCU callbacks is ready to invoke, then the remainder will | 150 | of RCU callbacks is ready to invoke, then the remainder will |
| 125 | be deferred. | 151 | be deferred. |