From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
To: Xiaolin Zhang <xiaolin.zhang@intel.com>,
intel-gfx@lists.freedesktop.org,
intel-gvt-dev@lists.freedesktop.org
Cc: joonas.lahtinen@intel.com, zhiyuan.lv@intel.com,
fei.jiang@intel.com, zhenyu.z.wang@intel.com,
hang.yuan@intel.com
Subject: Re: [RFC 03/10] drm/i915/gvt: context submission pvmmio optimization
Date: Thu, 27 Sep 2018 14:13:23 +0300 [thread overview]
Message-ID: <153804680300.12651.16067864736548531117@jlahtine-desk.ger.corp.intel.com> (raw)
In-Reply-To: <1538066275-52932-4-git-send-email-xiaolin.zhang@intel.com>
Quoting Xiaolin Zhang (2018-09-27 19:37:48)
> It is performance optimization to reduce mmio trap numbers from 4 to
> 1 durning ELSP porting writing (context submission).
>
> When context subission, to cache elsp_data[4] values in
> the shared page, the last elsp_data[0] port writing will be trapped
> to gvt for real context submission.
>
> Use PVMMIO_ELSP_SUBMIT to control this level of pvmmio optimization.
>
> Signed-off-by: Xiaolin Zhang <xiaolin.zhang@intel.com>
These changes are somewhat invasive to the ELSP submit path.
We should instead look into providing "pvgpu" (just a suggestion for
name) flavour of virtual functions which do the para-virtualized talking.
We don't want to sprinkle pv code around the driver with ifs.
Regards, Joonas
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next prev parent reply other threads:[~2018-09-27 11:13 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-27 16:37 [RFC 00/10] i915 pvmmio to improve GVTg performance Xiaolin Zhang
2018-09-27 7:20 ` ✗ Fi.CI.CHECKPATCH: warning for " Patchwork
2018-09-27 7:24 ` ✗ Fi.CI.SPARSE: " Patchwork
2018-09-27 7:43 ` ✓ Fi.CI.BAT: success " Patchwork
2018-09-27 10:25 ` ✓ Fi.CI.IGT: " Patchwork
2018-09-27 11:07 ` [RFC 00/10] " Joonas Lahtinen
2018-09-28 6:11 ` Zhang, Xiaolin
2018-09-27 16:37 ` [RFC 01/10] drm/i915/gvt: add module parameter enable_pvmmio Xiaolin Zhang
2018-09-27 7:16 ` Chris Wilson
2018-09-27 11:03 ` Joonas Lahtinen
2018-09-28 6:09 ` Zhang, Xiaolin
2018-10-09 2:26 ` Zhenyu Wang
2018-10-10 6:48 ` Zhang, Xiaolin
2018-09-27 16:37 ` [RFC 02/10] drm/i915/gvt: get ready of memory for pvmmio Xiaolin Zhang
2018-09-27 7:17 ` Chris Wilson
2018-09-28 7:31 ` Zhang, Xiaolin
2018-10-09 2:31 ` Zhenyu Wang
2018-09-27 16:37 ` [RFC 03/10] drm/i915/gvt: context submission pvmmio optimization Xiaolin Zhang
2018-09-27 7:19 ` Chris Wilson
2018-09-28 5:31 ` Zhang, Xiaolin
2018-09-27 11:13 ` Joonas Lahtinen [this message]
2018-09-27 16:37 ` [RFC 04/10] drm/i915/gvt: master irq " Xiaolin Zhang
2018-09-27 16:37 ` [RFC 05/10] drm/i915/gvt: ppgtt update " Xiaolin Zhang
2018-09-27 16:37 ` [RFC 06/10] drm/i915/gvt: GVTg handle enable_pvmmio PVINFO register Xiaolin Zhang
2018-09-27 16:37 ` [RFC 07/10] drm/i915/gvt: GVTg read_shared_page implementation Xiaolin Zhang
2018-09-27 16:37 ` [RFC 08/10] drm/i915/gvt: GVTg support context submission pvmmio optimization Xiaolin Zhang
2018-09-27 16:37 ` [RFC 09/10] drm/i915/gvt: GVTg support master irq " Xiaolin Zhang
2018-09-27 16:37 ` [RFC 10/10] drm/i915/gvt: GVTg support ppgtt " Xiaolin Zhang
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