Therefore, function arm_smmu_cmdq_issue_cmd_with_sync() is added to insert
the 'cmd+sync' commands at a time.
Signed-off-by: Zhen Lei
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 33 +
1 file changed, 21 insertions(+), 12 deletions(-)
diff --git
On Wed, Aug 11, 2021 at 11:31:08AM +0100, John Garry wrote:
> > > > > Obviously, inserting as many commands at a time as possible can
> > > > > reduce the
> > > > > number of times the mutex contention participates, thereby improving
> > > > > the
> > > > > overall performance. At least it
Obviously, inserting as many commands at a time as possible can reduce the
number of times the mutex contention participates, thereby improving the
overall performance. At least it reduces the number of calls to function
arm_smmu_cmdq_issue_cmdlist().
Therefore, function
On Wed, Aug 11, 2021 at 10:16:39AM +0800, Leizhen (ThunderTown) wrote:
>
>
> On 2021/8/11 2:24, Will Deacon wrote:
> > On Sat, Jun 26, 2021 at 07:01:24PM +0800, Zhen Lei wrote:
> >> The obvious key to the performance optimization of commit 587e6c10a7ce
> >> ("iommu/arm-smmu-v3: Reduce contention
On 2021/8/11 2:24, Will Deacon wrote:
> On Sat, Jun 26, 2021 at 07:01:24PM +0800, Zhen Lei wrote:
>> The obvious key to the performance optimization of commit 587e6c10a7ce
>> ("iommu/arm-smmu-v3: Reduce contention during command-queue insertion") is
>> to allow multiple cores to insert commands
On Sat, Jun 26, 2021 at 07:01:24PM +0800, Zhen Lei wrote:
> The obvious key to the performance optimization of commit 587e6c10a7ce
> ("iommu/arm-smmu-v3: Reduce contention during command-queue insertion") is
> to allow multiple cores to insert commands in parallel after a brief mutex
> contention.
The obvious key to the performance optimization of commit 587e6c10a7ce
("iommu/arm-smmu-v3: Reduce contention during command-queue insertion") is
to allow multiple cores to insert commands in parallel after a brief mutex
contention.
Obviously, inserting as many commands at a time as possible can
