From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Davidlohr Bueso <dave@stgolabs.net>
Cc: Andi Kleen <ak@linux.intel.com>,
jolsa@redhat.com, mingo@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH -tip 0/7] tools/perf: Update rbtree implementation and optimize users
Date: Mon, 27 Nov 2017 14:14:22 -0300 [thread overview]
Message-ID: <20171127171422.GB3298@kernel.org> (raw)
In-Reply-To: <20171127161457.3gqxg2ex67whxtwu@linux-n805>
Em Mon, Nov 27, 2017 at 08:14:57AM -0800, Davidlohr Bueso escreveu:
> On Sun, 26 Nov 2017, Andi Kleen wrote:
>
> > > Applies on today's -tip tree. Please consider for v4.16.
> >
> > No numbers on the improvements?
>
> I have not done performance tests perse for perf, but ultimately
> it will depend a lot on the workload and size of the tree. I had
> previously measured, on a Xeon E5-2450 @ 2.10GHz, the cost of
> an rb_first() was ~60 cycles for 100 nodes, and ~75 cycles with
> 1000 nodes. fwiw.
I'll try to do some before/after perf stat runs to compare output and to
see the overall diff in cycles, etc.
- Arnaldo
prev parent reply other threads:[~2017-11-27 17:14 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-27 2:30 [PATCH -tip 0/7] tools/perf: Update rbtree implementation and optimize users Davidlohr Bueso
2017-11-27 2:30 ` [PATCH 1/7] tools/perf: Update rbtree implementation Davidlohr Bueso
2017-11-27 2:30 ` [PATCH 2/7] perf machine: Use cached rbtrees Davidlohr Bueso
2018-01-04 5:51 ` [lkp-robot] [perf machine] 8edf8850d5: stderr./usr/src/linux-perf-x86_64-rhel-#/tools/perf/util/rb_resort.h:#:#:error:passing_argument#of'threads_sorted__new'from_incompatible_pointer_type[-Werror=incompatible-pointer-types] kernel test robot
2018-01-05 17:04 ` Davidlohr Bueso
2017-11-27 2:30 ` [PATCH 3/7] perf callchain: Use cached rbtrees Davidlohr Bueso
2017-11-27 2:30 ` [PATCH 4/7] perf util: Use cached rbtree for rblists Davidlohr Bueso
2017-11-27 2:30 ` [PATCH 5/7] perf symbols: Use cached rbtrees Davidlohr Bueso
2017-11-27 2:30 ` [PATCH 6/7] perf hist: " Davidlohr Bueso
2017-11-27 2:30 ` [PATCH 7/7] perf sched: " Davidlohr Bueso
2017-11-27 6:06 ` [PATCH -tip 0/7] tools/perf: Update rbtree implementation and optimize users Andi Kleen
2017-11-27 16:14 ` Davidlohr Bueso
2017-11-27 17:14 ` Arnaldo Carvalho de Melo [this message]
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