linux-kernel - Re: [PATCH 6/6] perf: Add dcacheline sort

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20140516151834.GV50500@redhat.com>
Date:	Fri, 16 May 2014 11:18:34 -0400
From:	Don Zickus <dzickus@...hat.com>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...il.com>,
	Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH 6/6] perf: Add dcacheline sort

On Fri, May 16, 2014 at 04:09:59PM +0200, Stephane Eranian wrote:
> > diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
> > index 635cd8f..0e91ba9 100644
> > --- a/tools/perf/util/sort.c
> > +++ b/tools/perf/util/sort.c
> > @@ -1,3 +1,4 @@
> > +#include <sys/mman.h>
> >  #include "sort.h"
> >  #include "hist.h"
> >  #include "comm.h"
> > @@ -764,6 +765,102 @@ static int hist_entry__snoop_snprintf(struct hist_entry *he, char *bf,
> >         return repsep_snprintf(bf, size, "%-*s", width, out);
> >  }
> >
> > +#define CACHE_LINESIZE       64
> I had something similar to your patch here in my original series for
> perf mem, but I never pushed it.
> I think this is a useful feature to have.
> However, I don't think you can hardcode the cache line size to 64.
> This is generic
> code. There may be architectures where the line size is different from 64.
> So I think you should add an option to change the default line size or provide
> an arch-specific definition.

I agree.  I'll dig up a way to do that.  Thanks!

Cheers,
Don
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/