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-rw-r--r--Documentation/RCU/trace.txt22
1 files changed, 13 insertions, 9 deletions
diff --git a/Documentation/RCU/trace.txt b/Documentation/RCU/trace.txt
index f3778f8952da..910870b15acd 100644
--- a/Documentation/RCU/trace.txt
+++ b/Documentation/RCU/trace.txt
@@ -396,14 +396,14 @@ o Each element of the form "3/3 ..>. 0:7 ^0" represents one rcu_node
396 396
397The output of "cat rcu/rcu_sched/rcu_pending" looks as follows: 397The output of "cat rcu/rcu_sched/rcu_pending" looks as follows:
398 398
399 0!np=26111 qsp=29 rpq=5386 cbr=1 cng=570 gpc=3674 gps=577 nn=15903 399 0!np=26111 qsp=29 rpq=5386 cbr=1 cng=570 gpc=3674 gps=577 nn=15903 ndw=0
400 1!np=28913 qsp=35 rpq=6097 cbr=1 cng=448 gpc=3700 gps=554 nn=18113 400 1!np=28913 qsp=35 rpq=6097 cbr=1 cng=448 gpc=3700 gps=554 nn=18113 ndw=0
401 2!np=32740 qsp=37 rpq=6202 cbr=0 cng=476 gpc=4627 gps=546 nn=20889 401 2!np=32740 qsp=37 rpq=6202 cbr=0 cng=476 gpc=4627 gps=546 nn=20889 ndw=0
402 3 np=23679 qsp=22 rpq=5044 cbr=1 cng=415 gpc=3403 gps=347 nn=14469 402 3 np=23679 qsp=22 rpq=5044 cbr=1 cng=415 gpc=3403 gps=347 nn=14469 ndw=0
403 4!np=30714 qsp=4 rpq=5574 cbr=0 cng=528 gpc=3931 gps=639 nn=20042 403 4!np=30714 qsp=4 rpq=5574 cbr=0 cng=528 gpc=3931 gps=639 nn=20042 ndw=0
404 5 np=28910 qsp=2 rpq=5246 cbr=0 cng=428 gpc=4105 gps=709 nn=18422 404 5 np=28910 qsp=2 rpq=5246 cbr=0 cng=428 gpc=4105 gps=709 nn=18422 ndw=0
405 6!np=38648 qsp=5 rpq=7076 cbr=0 cng=840 gpc=4072 gps=961 nn=25699 405 6!np=38648 qsp=5 rpq=7076 cbr=0 cng=840 gpc=4072 gps=961 nn=25699 ndw=0
406 7 np=37275 qsp=2 rpq=6873 cbr=0 cng=868 gpc=3416 gps=971 nn=25147 406 7 np=37275 qsp=2 rpq=6873 cbr=0 cng=868 gpc=3416 gps=971 nn=25147 ndw=0
407 407
408The fields are as follows: 408The fields are as follows:
409 409
@@ -432,6 +432,10 @@ o "gpc" is the number of times that an old grace period had
432o "gps" is the number of times that a new grace period had started, 432o "gps" is the number of times that a new grace period had started,
433 but this CPU was not yet aware of it. 433 but this CPU was not yet aware of it.
434 434
435o "ndw" is the number of times that a wakeup of an rcuo
436 callback-offload kthread had to be deferred in order to avoid
437 deadlock.
438
435o "nn" is the number of times that this CPU needed nothing. 439o "nn" is the number of times that this CPU needed nothing.
436 440
437 441
@@ -443,7 +447,7 @@ The output of "cat rcu/rcuboost" looks as follows:
443 balk: nt=0 egt=6541 bt=0 nb=0 ny=126 nos=0 447 balk: nt=0 egt=6541 bt=0 nb=0 ny=126 nos=0
444 448
445This information is output only for rcu_preempt. Each two-line entry 449This information is output only for rcu_preempt. Each two-line entry
446corresponds to a leaf rcu_node strcuture. The fields are as follows: 450corresponds to a leaf rcu_node structure. The fields are as follows:
447 451
448o "n:m" is the CPU-number range for the corresponding two-line 452o "n:m" is the CPU-number range for the corresponding two-line
449 entry. In the sample output above, the first entry covers 453 entry. In the sample output above, the first entry covers