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| author | Adrian Hunter <adrian.hunter@intel.com> | 2018-12-21 14:06:16 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-01-02 10:49:51 -0300 |
| commit | f6060ac60190c625101a0b94c2d96e9ca14a7d73 (patch) | |
| tree | 0eb9fbd6c56f4e9256cc69fbcfaaaeafb6772b77 /tools | |
| parent | bd8e68ace110941f375f5d566b0cd99fe80634b8 (diff) | |
| download | linux-f6060ac60190c625101a0b94c2d96e9ca14a7d73.tar.gz linux-f6060ac60190c625101a0b94c2d96e9ca14a7d73.tar.bz2 linux-f6060ac60190c625101a0b94c2d96e9ca14a7d73.zip | |
perf thread-stack: Allow for a thread stack array
In preparation for fixing thread stack processing for the idle task,
allow for a thread stack array.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20181221120620.9659-5-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/util/thread-stack.c | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/tools/perf/util/thread-stack.c b/tools/perf/util/thread-stack.c index d93cd286b048..a5f7b9d8fc23 100644 --- a/tools/perf/util/thread-stack.c +++ b/tools/perf/util/thread-stack.c @@ -60,6 +60,7 @@ struct thread_stack_entry { * @last_time: last timestamp * @crp: call/return processor * @comm: current comm + * @arr_sz: size of array if this is the first element of an array */ struct thread_stack { struct thread_stack_entry *stack; @@ -71,6 +72,7 @@ struct thread_stack { u64 last_time; struct call_return_processor *crp; struct comm *comm; + unsigned int arr_sz; }; static int thread_stack__grow(struct thread_stack *ts) @@ -100,6 +102,8 @@ static struct thread_stack *thread_stack__new(struct thread *thread, if (!ts) return NULL; + ts->arr_sz = 1; + if (thread_stack__grow(ts)) { free(ts); return NULL; @@ -234,11 +238,19 @@ static int __thread_stack__flush(struct thread *thread, struct thread_stack *ts) int thread_stack__flush(struct thread *thread) { struct thread_stack *ts = thread->ts; + unsigned int pos; + int err = 0; - if (ts) - return __thread_stack__flush(thread, ts); + if (ts) { + for (pos = 0; pos < ts->arr_sz; pos++) { + int ret = __thread_stack__flush(thread, ts + pos); - return 0; + if (ret) + err = ret; + } + } + + return err; } int thread_stack__event(struct thread *thread, u32 flags, u64 from_ip, @@ -314,13 +326,29 @@ void thread_stack__set_trace_nr(struct thread *thread, u64 trace_nr) } } +static void __thread_stack__free(struct thread *thread, struct thread_stack *ts) +{ + __thread_stack__flush(thread, ts); + zfree(&ts->stack); +} + +static void thread_stack__reset(struct thread *thread, struct thread_stack *ts) +{ + unsigned int arr_sz = ts->arr_sz; + + __thread_stack__free(thread, ts); + memset(ts, 0, sizeof(*ts)); + ts->arr_sz = arr_sz; +} + void thread_stack__free(struct thread *thread) { struct thread_stack *ts = thread->ts; + unsigned int pos; if (ts) { - __thread_stack__flush(thread, ts); - zfree(&ts->stack); + for (pos = 0; pos < ts->arr_sz; pos++) + __thread_stack__free(thread, ts + pos); zfree(&thread->ts); } } @@ -611,7 +639,7 @@ int thread_stack__process(struct thread *thread, struct comm *comm, if (ts && !ts->crp) { /* Supersede thread_stack__event() */ - thread_stack__free(thread); + thread_stack__reset(thread, ts); ts = NULL; } |