Reland "Avoid loop-dependent behavior in GrMemoryPoolBench"
This reverts commit dff4c1d5fd0011f33094fb1e87478fbc849e6b5e.
Reason for revert: Fix WIP
Original change's description:
> Revert "Avoid loop-dependent behavior in GrMemoryPoolBench"
>
> This reverts commit f811fc331a143631f3ba48a266336ccf18d5a459.
>
> Reason for revert: breaks on iOS
>
> Original change's description:
> > Avoid loop-dependent behavior in GrMemoryPoolBench
> >
> > This helps stability of benchmark across repeated runs, and across code
> > changes. Previously, a change to the tuned loop count could radically
> > change the allocation behavior within the loop's iteration and lead to
> > unfair comparisons.
> >
> > In addition, this separates the stack allocation pattern into N allocations
> > followed by N LIFO releases, and a push-pop alternating pattern of N
> > allocates and releases (so still LIFO, but reuses the memory at the start
> > of a block).
> >
> > In later CLs experimenting on the memory pool, I found that there were
> > surprising effects on performance linked to the specific interaction between
> > the allocation size, per-allocation metadata, and per-block metadata. To
> > help differentiate these coincidences, this adds two modes of allocation
> > where one should already be aligned.
> >
> > It also moves away from a global pool, so that it's possible to benchmark
> > on different block sizes and factor in the allocation/release cost of the
> > actual blocks (vs. the cursor management of a larger sized pool). As part
> > of this, the new/delete reference operator is added as an explicit benchmark.
> >
> > Change-Id: I12b8c11cb75db0df70460fe2e8cf6c029db7eb22
> > Reviewed-on: https://skia-review.googlesource.com/c/skia/+/262936
> > Commit-Queue: Michael Ludwig <michaelludwig@google.com>
> > Reviewed-by: Brian Salomon <bsalomon@google.com>
>
> TBR=bsalomon@google.com,michaelludwig@google.com
>
> Change-Id: I16f2810699a378eb5a516ab9fb1834c10b65f01b
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/263029
> Reviewed-by: Michael Ludwig <michaelludwig@google.com>
> Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Change-Id: I51a9db111c26b49572c3fa0928e26ef6e5a7a74c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/263196
Commit-Queue: Michael Ludwig <michaelludwig@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
Auto-Submit: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
1 file changed