From: Ian Rogers <irogers@google.com>
To: irogers@google.com, acme@kernel.org, james.clark@linaro.org,
namhyung@kernel.org
Cc: 9erthalion6@gmail.com, adrian.hunter@intel.com, alex@ghiti.fr,
alexandre.chartre@oracle.com, andrii@kernel.org,
ankur.a.arora@oracle.com, aou@eecs.berkeley.edu,
bpf@vger.kernel.org, collin.funk1@gmail.com,
costa.shul@redhat.com, daniel@iogearbox.net,
dapeng1.mi@linux.intel.com, dsterba@suse.com, eddyz87@gmail.com,
howardchu95@gmail.com, jolsa@kernel.org, leo.yan@arm.com,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
martin.lau@linux.dev, memxor@gmail.com, mingo@redhat.com,
mmayer@broadcom.com, nathan@kernel.org, palmer@dabbelt.com,
peterz@infradead.org, pjw@kernel.org, qmo@kernel.org,
ricky.ringler@proton.me, song@kernel.org,
swapnil.sapkal@amd.com, terrelln@fb.com, tglozar@redhat.com,
thomas.falcon@intel.com, yonghong.song@linux.dev
Subject: [PATCH v2 12/18] perf build: Move libsymbol dependency out of prepare step
Date: Tue, 12 May 2026 10:46:32 -0700 [thread overview]
Message-ID: <20260512174638.120445-13-irogers@google.com> (raw)
In-Reply-To: <20260512174638.120445-1-irogers@google.com>
The prepare step is a large serialization point before parallel
sub-makes build the perf tool. The libsymbol headers are used in the
bench and util libraries. Move the libsymbol dependency out of the
prepare step and into the dependencies for those targets to avoid it
being a source of serialization in the prepare step.
Tested-by: James Clark <james.clark@linaro.org>
Assisted-by: Gemini:gemini-3.1-pro-preview
Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/Makefile.perf | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index df68d29ecab7..d2e673d5e5be 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -558,7 +558,7 @@ $(LIBPMU_EVENTS): $(LIBPMU_EVENTS_IN)
# The $(LIBPERF_UTIL) dependency is to ensure bpftool and vmlinux.h
# aren't racily built for bench/bpf_skel/bench_uprobe.bpf.c
-$(LIBPERF_BENCH_IN): FORCE prepare $(LIBBPF) | $(LIBPERF_UTIL)
+$(LIBPERF_BENCH_IN): FORCE prepare $(LIBBPF) $(LIBSYMBOL) | $(LIBPERF_UTIL)
$(Q)$(MAKE) $(build)=perf-bench
$(LIBPERF_BENCH): $(LIBPERF_BENCH_IN)
@@ -576,7 +576,7 @@ $(LIBPERF_UI_IN): FORCE prepare
$(LIBPERF_UI): $(LIBPERF_UI_IN)
$(QUIET_AR)$(RM) $@ && $(AR) rcs $@ $<
-$(LIBPERF_UTIL_IN): FORCE prepare $(LIBBPF)
+$(LIBPERF_UTIL_IN): FORCE prepare $(LIBBPF) $(LIBSYMBOL)
$(Q)$(MAKE) $(build)=perf-util
$(LIBPERF_UTIL): $(LIBPERF_UTIL_IN)
@@ -637,8 +637,7 @@ prepare: $(OUTPUT)PERF-VERSION-FILE \
bpf-skel-prepare \
$(LIBAPI) \
$(LIBPERF) \
- $(LIBSUBCMD) \
- $(LIBSYMBOL)
+ $(LIBSUBCMD)
$(OUTPUT)%.o: %.c prepare FORCE
$(Q)$(MAKE) -f $(srctree)/tools/build/Makefile.build dir=$(build-dir) $@
--
2.54.0.563.g4f69b47b94-goog
next prev parent reply other threads:[~2026-05-12 17:47 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-12 5:35 [PATCH v1 00/14] perf build: Reduce build time by one third Ian Rogers
2026-05-12 5:35 ` [PATCH v1 01/14] bpftool build: Restrict feature tests during bootstrap compilation Ian Rogers
2026-05-12 5:35 ` [PATCH v1 02/14] perf trace beauty: Make beauty generated C code standalone .o files Ian Rogers
2026-05-12 5:35 ` [PATCH v1 03/14] perf build: Decouple pmu-events from prepare umbrella target Ian Rogers
2026-05-12 5:35 ` [PATCH v1 04/14] perf build: Remove empty archheaders target Ian Rogers
2026-05-12 5:35 ` [PATCH v1 05/14] perf build: Move BPF skeleton generation out of Makefile.perf Ian Rogers
2026-05-12 5:35 ` [PATCH v1 06/14] perf build: Encapsulate vmlinux.h and bpftool in bpf_skel.mak Ian Rogers
2026-05-12 5:35 ` [PATCH v1 07/14] perf build: Move static libbpf dependency out of prepare step Ian Rogers
2026-05-12 5:35 ` [PATCH v1 08/14] perf build: Pre-generate BPF skeletons during umbrella prepare phase Ian Rogers
2026-05-12 5:35 ` [PATCH v1 09/14] perf build: Move libsymbol dependency out of prepare step Ian Rogers
2026-05-12 5:35 ` [PATCH v1 10/14] perf build: Remove redundant libbpf feature check for static builds Ian Rogers
2026-05-12 5:35 ` [PATCH v1 11/14] tools build: Integrate libdebuginfod into test-all fast path Ian Rogers
2026-05-12 5:35 ` [PATCH v1 12/14] perf pmu-events: Split big_c_string storage into standalone compilation unit Ian Rogers
2026-05-12 5:35 ` [PATCH v1 13/14] perf pmu-events: Parallelize JSON and metric pre-computation in jevents.py Ian Rogers
2026-05-12 5:35 ` [PATCH v1 14/14] perf build: Prefix SCRIPTS with output directory to fix continuous rebuilds Ian Rogers
2026-05-12 17:46 ` [PATCH v2 00/18] perf build: Reduce build time by nearly half Ian Rogers
2026-05-12 17:46 ` [PATCH v2 01/18] bpftool build: Restrict feature tests during bootstrap compilation Ian Rogers
2026-05-12 17:46 ` [PATCH v2 02/18] tools build: Integrate libdebuginfod into test-all fast path Ian Rogers
2026-05-12 17:46 ` [PATCH v2 03/18] tools build: Fix test-clang-bpf-co-re.bin to generate target file Ian Rogers
2026-05-12 17:46 ` [PATCH v2 04/18] tools scripts: Short-circuit CC_NO_CLANG compiler probe in Makefile.include Ian Rogers
2026-05-12 17:46 ` [PATCH v2 05/18] perf trace beauty: Make beauty generated C code standalone .o files Ian Rogers
2026-05-12 17:46 ` [PATCH v2 06/18] perf build: Decouple pmu-events from prepare umbrella target Ian Rogers
2026-05-12 17:46 ` [PATCH v2 07/18] perf build: Remove empty archheaders target Ian Rogers
2026-05-12 17:46 ` [PATCH v2 08/18] perf build: Move BPF skeleton generation out of Makefile.perf Ian Rogers
2026-05-12 17:46 ` [PATCH v2 09/18] perf build: Encapsulate vmlinux.h and bpftool in bpf_skel.mak Ian Rogers
2026-05-12 17:46 ` [PATCH v2 10/18] perf build: Move static libbpf dependency out of prepare step Ian Rogers
2026-05-12 17:46 ` [PATCH v2 11/18] perf build: Pre-generate BPF skeleton tooling during umbrella prepare phase Ian Rogers
2026-05-12 17:46 ` Ian Rogers [this message]
2026-05-12 17:46 ` [PATCH v2 13/18] perf build: Remove redundant libbpf feature check for static builds Ian Rogers
2026-05-12 17:46 ` [PATCH v2 14/18] perf pmu-events: Split big_c_string storage into standalone compilation unit Ian Rogers
2026-05-12 17:46 ` [PATCH v2 15/18] perf pmu-events: Parallelize JSON and metric pre-computation in jevents.py Ian Rogers
2026-05-12 17:46 ` [PATCH v2 16/18] perf build: Prefix SCRIPTS with output directory to fix continuous rebuilds Ian Rogers
2026-05-12 17:46 ` [PATCH v2 17/18] perf pmu-events: Convert recursive shell assignments and macros to Make built-ins Ian Rogers
2026-05-12 17:46 ` [PATCH v2 18/18] perf build: Convert llvm-config shell queries to simply expanded variables Ian Rogers
2026-05-12 9:36 ` [PATCH v1 00/14] perf build: Reduce build time by one third James Clark
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