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([2620:10d:c090:500::4:f345]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-14124454d3csm2895670c88.2.2026.08.11.14.37.14 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Aug 2026 14:37:15 -0700 (PDT) Message-ID: Subject: Re: [PATCH bpf-next v7 6/6] selftests/bpf: Test subprogram instruction statistics From: Eduard Zingerman To: Kumar Kartikeya Dwivedi , bpf@vger.kernel.org Cc: Alexei Starovoitov , Andrii Nakryiko , Daniel Borkmann , Emil Tsalapatis , kkd@meta.com, kernel-team@meta.com Date: Tue, 11 Aug 2026 14:37:13 -0700 In-Reply-To: <20260808062601.1070988-7-memxor@gmail.com> References: <20260808062601.1070988-1-memxor@gmail.com> <20260808062601.1070988-7-memxor@gmail.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.60.1 (3.60.1-1.fc44) Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Sat, 2026-08-08 at 08:25 +0200, Kumar Kartikeya Dwivedi wrote: > Add small verifier programs with deterministic instruction streams to > exercise per-subprogram self and inclusive instruction accounting. Use > assembly for normal call chains and straight-line callback bodies contain= ing > only moves, calls, and returns or exits, so control-flow pruning does not= make > the expected counts unstable. Pass callback arguments as explicit assembl= y > operands so the compiler keeps their registers live across the asm block. >=20 > Cover asynchronous callback attribution separately: main verification-roo= t > totals include all callback exploration, while static and callback totals > remain local to their synchronous paths. >=20 > Signed-off-by: Kumar Kartikeya Dwivedi > --- Acked-by: Eduard Zingerman ...