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SubjectRe: [PATCH v16 00/15] perf tools: Support overwritable ring buffer
On Thu, Jul 14, 2016 at 08:34:32AM +0000, Wang Nan wrote:


> v15 -> v16: Follow Jiri Olsa's suggestion:
> 1. Move backward ring buffer state machine to evlist.
> 2. Dynamically allocate backward mmap, so backward_mmap == NULL
> means there's no backward ring buffer.
> Stop the state machine when there's no backward ring buffer.
> 3. Rename: _output2 to _output_backward.
> 4. Patch rearrangement.
> 5. Update record__pick_pc(): read from backward_mmap if normal
> mmap is empty.
> Arnaldo Carvalho de Melo (1):
> perf tools: Drop redundant evsel->overwrite indicator
> Wang Nan (14):
> tools lib fd array: Allow associating a pointer cookie with each entry
> perf tools: Update perf evlist mmap related APIs and helpers
> perf tools: Decouple record__mmap_read() and evlist.
> perf tools: Record mmap cookie into fdarray private field
> perf tools: Extract common code in mmap failure processing
> perf tools: Introduce backward_mmap array for evlist
> perf tools: Map backward events to backward_mmap
> perf tools: Drop evlist->backward
> perf tools: Setup backward mmap state machine
> perf record: Read from overwritable ring buffer
> perf tools: Make perf_evlist__{pause,resume} internal helpers
> perf tools: Enable overwrite settings
> perf tools: Don't warn about out of order event if write_backward is
> used
> perf tools: Add --tail-synthesize option

looks good to me now ;-)

Acked-by: Jiri Olsa <>


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