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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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32eb6bcfdd
As kmem_caches share the same properties (size, allocation/free behaviour) for all potential devices, we can use global caches. While this potential has worse fragmentation behaviour (one can argue that different devices would have different activity lifetimes, but you can also argue that activity is temporal across the system) it is the default behaviour of the system at large to amalgamate matching caches. The benefit for us is much reduced pointer dancing along the frequent allocation paths. v2: Defer shrinking until after a global grace period for futureproofing multiple consumers of the slab caches, similar to the current strategy for avoiding shrinking too early. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190228102035.5857-1-chris@chris-wilson.co.uk
60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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*/
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#include "mock_engine.h"
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#include "mock_request.h"
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struct i915_request *
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mock_request(struct intel_engine_cs *engine,
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struct i915_gem_context *context,
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unsigned long delay)
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{
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struct i915_request *request;
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/* NB the i915->requests slab cache is enlarged to fit mock_request */
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request = i915_request_alloc(engine, context);
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if (IS_ERR(request))
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return NULL;
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request->mock.delay = delay;
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return request;
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}
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bool mock_cancel_request(struct i915_request *request)
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{
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struct mock_engine *engine =
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container_of(request->engine, typeof(*engine), base);
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bool was_queued;
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spin_lock_irq(&engine->hw_lock);
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was_queued = !list_empty(&request->mock.link);
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list_del_init(&request->mock.link);
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spin_unlock_irq(&engine->hw_lock);
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if (was_queued)
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i915_request_unsubmit(request);
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return was_queued;
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}
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