> Perf record can switch output. The new output should only store the data
> after switching. However, in overwrite backward mode, the new output still
> have the data from old output. That also brings extra overhead.
>
> At the end of mmap_read, the position of processed ring buffer is saved in
> Perf record can switch output. The new output should only store the data
> after switching. However, in overwrite backward mode, the new output still
> have the data from old output. That also brings extra overhead.
>
> At the end of mmap_read, the position of processed ring buffer is saved in
Hi Kan, Please see if this patch works for you.
On 2017/10/14 7:16, Wang Nan wrote:
Perf record can switch output. The new output should only store the
data after switching. However, in overwrite backward mode, the new
output still have the data from old output. That also brings extra
Hi Kan, Please see if this patch works for you.
On 2017/10/14 7:16, Wang Nan wrote:
Perf record can switch output. The new output should only store the
data after switching. However, in overwrite backward mode, the new
output still have the data from old output. That also brings extra
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