perf config: Write a config file just once
Currently set_config() can be repeatedly called for each input config on the below case: $ perf config kmem.default=slab report.children=false ... But it's a waste, so only once write a config file gathering all given config key=value pairs. Signed-off-by: NTaeung Song <treeze.taeung@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1504754331-9776-1-git-send-email-treeze.taeung@gmail.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
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