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From: Namhyung Kim <namhyung@kernel.org>
Date: Fri, 16 Feb 2024 17:04:01 -0800
Message-ID: <CAM9d7ciPYMd4zckrcgnPtradZ_bvaNOHji1tkkYQu_TTF5=eYw@mail.gmail.com>
Subject: Re: [PATCH v3 0/8] Clean up libperf cpumap's empty function
To: Ian Rogers <irogers@google.com>, Adrian Hunter <adrian.hunter@intel.com>, 
	James Clark <james.clark@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>, Ingo Molnar <mingo@redhat.com>, 
	Arnaldo Carvalho de Melo <acme@kernel.org>, Mark Rutland <mark.rutland@arm.com>, 
	Alexander Shishkin <alexander.shishkin@linux.intel.com>, Jiri Olsa <jolsa@kernel.org>, 
	Suzuki K Poulose <suzuki.poulose@arm.com>, Mike Leach <mike.leach@linaro.org>, 
	John Garry <john.g.garry@oracle.com>, Will Deacon <will@kernel.org>, 
	Thomas Gleixner <tglx@linutronix.de>, Darren Hart <dvhart@infradead.org>, 
	Davidlohr Bueso <dave@stgolabs.net>, =?UTF-8?Q?Andr=C3=A9_Almeida?= <andrealmeid@igalia.com>, 
	Kan Liang <kan.liang@linux.intel.com>, K Prateek Nayak <kprateek.nayak@amd.com>, 
	Sean Christopherson <seanjc@google.com>, Paolo Bonzini <pbonzini@redhat.com>, 
	Kajol Jain <kjain@linux.ibm.com>, Athira Rajeev <atrajeev@linux.vnet.ibm.com>, 
	Andrew Jones <ajones@ventanamicro.com>, Alexandre Ghiti <alexghiti@rivosinc.com>, 
	Atish Patra <atishp@rivosinc.com>, "Steinar H. Gunderson" <sesse@google.com>, 
	Yang Jihong <yangjihong1@huawei.com>, Yang Li <yang.lee@linux.alibaba.com>, 
	Changbin Du <changbin.du@huawei.com>, Sandipan Das <sandipan.das@amd.com>, 
	Ravi Bangoria <ravi.bangoria@amd.com>, Paran Lee <p4ranlee@gmail.com>, 
	Nick Desaulniers <ndesaulniers@google.com>, Huacai Chen <chenhuacai@kernel.org>, 
	Yanteng Si <siyanteng@loongson.cn>, linux-perf-users@vger.kernel.org, 
	linux-kernel@vger.kernel.org, coresight@lists.linaro.org, 
	linux-arm-kernel@lists.infradead.org, bpf@vger.kernel.org, 
	Leo Yan <leo.yan@linux.dev>
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On Wed, Feb 14, 2024 at 2:03=E2=80=AFPM Ian Rogers <irogers@google.com> wro=
te:
>
> On Fri, Feb 2, 2024 at 3:41=E2=80=AFPM Ian Rogers <irogers@google.com> wr=
ote:
> >
> > Rename and clean up the use of libperf CPU map functions particularly
> > focussing on perf_cpu_map__empty that may return true for maps
> > containing CPUs but also with an "any CPU"/dummy value.
> >
> > perf_cpu_map__nr is also troubling in that iterating an empty CPU map
> > will yield the "any CPU"/dummy value. Reduce the appearance of some
> > calls to this by using the perf_cpu_map__for_each_cpu macro.
> >
> > v3: Address handling of "any" is arm-spe/cs-etm patch.
> > v2: 6 patches were merged by Arnaldo. New patch added ensure empty
> >     maps are allocated as NULL (suggested by James Clark). Hopefully a
> >     fix to "perf arm-spe/cs-etm: Directly iterate CPU maps".
> >
> > Ian Rogers (8):
> >   libperf cpumap: Add any, empty and min helpers
> >   libperf cpumap: Ensure empty cpumap is NULL from alloc
> >   perf arm-spe/cs-etm: Directly iterate CPU maps
> >   perf intel-pt/intel-bts: Switch perf_cpu_map__has_any_cpu_or_is_empty
> >     use
> >   perf cpumap: Clean up use of perf_cpu_map__has_any_cpu_or_is_empty
> >   perf arm64 header: Remove unnecessary CPU map get and put
> >   perf stat: Remove duplicate cpus_map_matched function
> >   perf cpumap: Use perf_cpu_map__for_each_cpu when possible
>
> Ping. Thanks,
> Ian

Adrian and James, are you ok with this now?

Thanks,
Namhyung