On 2024-08-30 19:02, Yury Norov wrote:
> On Fri, Aug 30, 2024 at 03:10:37PM -0400, Mathieu Desnoyers wrote:
>> Extend bitmap find.h and cpumask.h with additional binary operations
>> such as "nor".
>>
>> Also extend the testing and benchmark coverage of those bitmap find with
>> binary operations.
>>
>> This is useful for NUMA-aware rseq concurrency IDs which depend on this
>> series. The series can be found at:
>>
>> https://lore.kernel.org/lkml/20240823185946.418340-1-mathieu.desnoyers@efficios.com/
>>
>
> Added in bitmap-for-next for testing.
Hi Yuri,
FYI, after a lot of performance results analysis on variations over
the NUMA-aware rseq patch, I figured I need to take a drastically
different (and much simpler) approach to solve this in order to improve
cache locality as well, and it turns out I likely won't need the new
bitwise ops added by this series.
So feel free to keep it as a general improvement, or to drop it for
now.
Thanks,
Mathieu
>
> Thanks,
> Yury
>
>>
>> Mathieu Desnoyers (6):
>> lib: Clarify comment on top of find_next_andnot_bit
>> lib: Implement find_{first,next,nth}_nor_bit, for_each_nor_bit,
>> find_first_andnot_bit
>> lib: test bitmap sets binary operation iterators
>> lib: Fix test_find_first_and_bit and test_find_next_and_bit benchmark
>> lib: benchmark bitmap sets binary operation find
>> cpumask: Implement cpumask_{first,next}_{nor,andnot}
>>
>> include/linux/cpumask.h | 60 ++++++++++++++++
>> include/linux/find.h | 124 +++++++++++++++++++++++++++++++--
>> lib/find_bit.c | 36 ++++++++++
>> lib/find_bit_benchmark.c | 143 +++++++++++++++++++++++++++++++++------
>> lib/test_bitmap.c | 81 ++++++++++++++++++++++
>> 5 files changed, 418 insertions(+), 26 deletions(-)
>>
>> --
>> 2.39.2
--
Mathieu Desnoyers
EfficiOS Inc.
https://www.efficios.com