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Re: [patch] malloc per-thread cache ready for review
- From: Siddhesh Poyarekar <siddhesh at gotplt dot org>
- To: Wilco Dijkstra <Wilco dot Dijkstra at arm dot com>, Markus Trippelsdorf <markus at trippelsdorf dot de>, Carlos O'Donell <carlos at redhat dot com>
- Cc: "dj at redhat dot com" <dj at redhat dot com>, nd <nd at arm dot com>, "libc-alpha at sourceware dot org" <libc-alpha at sourceware dot org>
- Date: Thu, 2 Feb 2017 17:31:28 +0530
- Subject: Re: [patch] malloc per-thread cache ready for review
- Authentication-results: sourceware.org; auth=none
- References: <AM5PR0802MB2610379A307A9AE5DD985482834C0@AM5PR0802MB2610.eurprd08.prod.outlook.com>
On Thursday 02 February 2017 05:23 PM, Wilco Dijkstra wrote:
> I tried the new malloc (the patch as posted with several fixes from DJ's branch),
> however I don't see any improvement on SPEC. That's odd since several subtests
> spend ~10% of the time in malloc, and even with a single thread the locking is very
> expensive, so bypassing it should give a good speedup. And yes having written
That is very interesting, I'm going to look at this some more in the
coming weeks. I had tested an earlier version (around December) but I
didn't think the current one had any major improvements. Can you share
what kind of machines you ran your tests one?
Siddhesh