From: Zhenyu Wang <zhenyuw@linux.intel.com>
To: bradley.d.volkin@intel.com
Cc: intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH v2 3/3] drm/i915: Track OACONTROL register enable/disable during parsing
Date: Thu, 10 Apr 2014 14:07:21 +0800 [thread overview]
Message-ID: <20140410060721.GK15788@zhen-hp.sh.intel.com> (raw)
In-Reply-To: <1396027310-16951-1-git-send-email-bradley.d.volkin@intel.com>
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On 2014.03.28 10:21:50 -0700, bradley.d.volkin@intel.com wrote:
> From: Brad Volkin <bradley.d.volkin@intel.com>
>
> There is some thought that the data from the performance counters enabled
> via OACONTROL should only be available to the process that enabled counting.
> To limit snooping, require that any batch buffer which sets OACONTROL to a
> non-zero value also sets it back to 0 before the end of the batch.
>
I think this might be too strict although there's good point in this.
But it makes almost impossible to insert mi report count command to probe
GPU statistics from kind of third-party tool or lib.
Could we have a i915.enable_cmd_parser config that can disable this?
--
Open Source Technology Center, Intel ltd.
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next prev parent reply other threads:[~2014-04-10 6:07 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-27 18:43 [PATCH 0/3] Fix up cmd parser OACONTROL handling + refactorings bradley.d.volkin
2014-03-27 18:43 ` [PATCH 1/3] drm/i915: BUG_ON() when cmd/reg tables are not sorted bradley.d.volkin
2014-03-27 21:47 ` Kenneth Graunke
2014-03-27 23:56 ` Volkin, Bradley D
2014-04-02 9:11 ` Jani Nikula
2014-04-02 9:35 ` Daniel Vetter
2014-03-27 18:43 ` [PATCH 2/3] drm/i915: Refactor cmd parser checks into a function bradley.d.volkin
2014-03-27 21:49 ` Kenneth Graunke
2014-04-02 9:14 ` Jani Nikula
2014-03-27 18:43 ` [PATCH 3/3] drm/i915: Track OACONTROL register enable/disable during parsing bradley.d.volkin
2014-03-27 21:58 ` Kenneth Graunke
2014-03-28 0:06 ` Volkin, Bradley D
2014-03-28 7:51 ` Daniel Vetter
2014-03-28 17:21 ` [PATCH v2 " bradley.d.volkin
2014-03-28 17:37 ` Kenneth Graunke
2014-04-02 9:35 ` Jani Nikula
2014-04-10 6:07 ` Zhenyu Wang [this message]
2014-04-10 6:43 ` Daniel Vetter
2014-04-10 7:51 ` Zhenyu Wang
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