Re: [RFC] scripts: Include postprocessing script for memory allocation tracing
From: Janani Ravichandran <hidden>
Date: 2016-09-23 05:51:24
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On Sep 19, 2016, at 5:42 AM, Michal Hocko [off-list ref] wrote: On Tue 13-09-16 14:04:49, Janani Ravichandran wrote:quoted
quoted
On Sep 12, 2016, at 8:16 AM, Michal Hocko [off-list ref] wrote:I’m using the function graph tracer to see how long __alloc_pages_nodemask() took.How can you map the function graph tracer to a specif context? Let's say I would like to know why a particular allocation took so long. Would that be possible?
Maybe not. If the latencies are due to direct reclaim or memory compaction, you get some information from the tracepoints (like mm_vmscan_direct_reclaim_begin, mm_compaction_begin, etc). But otherwise, you don’t get any context information. Function graph only gives the time spent in alloc_pages_nodemask() in that case. Regards, Janani.
-- Michal Hocko SUSE Labs
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