[jira] [Commented] (TS-1684) Reduce the usage of global allocation/free lists - switch to using local thread allocation/free lists

["ASF subversion and git services (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TS-1684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13685997#comment-13685997 ] 

ASF subversion and git services commented on TS-1684:
-----------------------------------------------------

Commit 052da6724140c1a4721c5cf3f9b64810ab4444b8 in branch refs/heads/master from [~bcall]
[ https://git-wip-us.apache.org/repos/asf?p=trafficserver.git;h=052da67 ]

TS-1684 - Added more ProxyAllocators for faster and local memory
allocation.  Have seen a doubling in performance depending on the benchmark.
Details in the ticket.

                
> Reduce the usage of global allocation/free lists - switch to using local thread allocation/free lists
> -----------------------------------------------------------------------------------------------------
>
>                 Key: TS-1684
>                 URL: https://issues.apache.org/jira/browse/TS-1684
>             Project: Traffic Server
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Bryan Call
>            Assignee: Bryan Call
>             Fix For: 3.3.5
>
>         Attachments: ts-1684.patch
>
>
> When running benchmarks ink_freelist_new() normally shows up as one of if not the number one function in the code using the most CPU.  Currently ATS uses global free lists (via ClassAllocator<>, Allocator, and SparceClassAllocator<>) for memory allocation for some of its memory allocation.
> Here is a list of how frequently the type of allocations are used and the "name" given to the allocator.  This is a benchmark for a small object in cache fetched 100k times.
>  400000 ink_freelist_new: hdrHeap
>  300000 ink_freelist_new: hdrStrHeap
>  203541 ink_freelist_new: ioBlockAllocator
>  199616 proxy allocator thread_alloc: eventAllocator
>  103554 ink_freelist_new: ioDataAllocator
>  103554 ink_freelist_new: ioBufAllocator[5]
>  100100 ink_freelist_new: ioAllocator
>  100000 proxy allocator thread_alloc: hdrHeap
>  100000 proxy allocator thread_alloc: cacheVConnection
>  100000 ink_freelist_new: httpSMAllocator
>  100000 ink_freelist_new: ArenaBlock
>   18507 ink_freelist_new: mutexAllocator
>    4772 ink_freelist_new: eventAllocator
>     162 ink_freelist_new: cacheVConnection
>     102 ink_freelist_new: netVCAllocator
>     100 proxy allocator init thread_alloc: httpClientSessionAllocator
>     100 ink_freelist_new: httpClientSessionAllocator
>       1 proxy allocator thread_alloc: RamCacheCLFUSEntry
>       1 ink_freelist_new: RamCacheCLFUSEntry
>       1 ink_freelist_new: hostDBContAllocator

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