linux-kernel - Re: [PATCH v2 -tip] perf: x86, add SandyBridge support

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]

Date:	Mon, 28 Feb 2011 15:43:50 +0100
From:	Stephane Eranian <eranian@...gle.com>
To:	Lin Ming <ming.m.lin@...el.com>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>,
	lkml <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 -tip] perf: x86, add SandyBridge support

On Mon, Feb 28, 2011 at 3:33 PM, Lin Ming <ming.m.lin@...el.com> wrote:
> On Mon, 2011-02-28 at 20:25 +0800, Stephane Eranian wrote:
>> On Mon, Feb 28, 2011 at 10:15 AM, Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
>> > On Mon, 2011-02-28 at 15:22 +0800, Lin Ming wrote:
>> >> This patch adds basic SandyBridge support, including hardware cache
>> >> events and PEBS events support.
>> >>
>> >> LLC-* hareware cache events don't work for now, it depends on the
>> >> offcore patches.
>> >
>> > What's the status of those, Stephane reported some problems last I
>> > remember?
>> >
>> >
>> >>  #define INTEL_EVENT_CONSTRAINT(c, n) \
>> >>       EVENT_CONSTRAINT(c, n, ARCH_PERFMON_EVENTSEL_EVENT)
>> >> +#define INTEL_EVENT_CONSTRAINT2(c, n)        \
>> >> +     EVENT_CONSTRAINT(c, n, INTEL_ARCH_EVENT_MASK)
>> >
>> > That's a particularly bad name, how about something like
>> >
>> > INTEL_UEVENT_CONSTRAINT or somesuch.
>> >
>> >> @@ -702,7 +738,13 @@ static void intel_ds_init(void)
>> >>                       printk(KERN_CONT "PEBS fmt1%c, ", pebs_type);
>> >>                       x86_pmu.pebs_record_size = sizeof(struct pebs_record_nhm);
>> >>                       x86_pmu.drain_pebs = intel_pmu_drain_pebs_nhm;
>> >> -                     x86_pmu.pebs_constraints = intel_nehalem_pebs_events;
>> >> +                     switch (boot_cpu_data.x86_model) {
>> >> +                     case 42: /* SandyBridge */
>> >> +                             x86_pmu.pebs_constraints = intel_snb_pebs_events;
>> >> +                             break;
>> >> +                     default:
>> >> +                             x86_pmu.pebs_constraints = intel_nehalem_pebs_events;
>> >> +                     }
>> >>                       break;
>> >>
>> >>               default:
>> >
>> > We already have this massive model switch right after this function,
>> > might as well move the pebs constraint assignment there.
>> >
>> My PEBS  patch was going to cleanup this part, though it was using
>> it's own switch
>> statement.
>
> Did you send out the patch? A link?
>
For what?

>
>
--
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/