Commit 2e05bb52 authored by Dmitrii Dolgov's avatar Dmitrii Dolgov Committed by Arnaldo Carvalho de Melo
Browse files

perf test workload: Add code_with_type test workload 

The purpose of the workload is to gather samples of rust runtime. To
achieve that it has a dummy rust library linked with it.

Per recommendations for such scenarios [1], the rust library is
statically linked.

An example:

$ perf record perf test -w code_with_type
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.160 MB perf.data (4074 samples) ]

$ perf report --stdio --dso perf -s srcfile,srcline
    45.16%  ub_checks.rs       ub_checks.rs:72
     6.72%  code_with_type.rs  code_with_type.rs:15
     6.64%  range.rs           range.rs:767
     4.26%  code_with_type.rs  code_with_type.rs:21
     4.23%  range.rs           range.rs:0
     3.99%  code_with_type.rs  code_with_type.rs:16
    [...]

[1]: https://doc.rust-lang.org/reference/linkage.html#mixed-rust-and-foreign-codebases



Signed-off-by: default avatarDmitrii Dolgov <9erthalion6@gmail.com>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 6a32fa5c

tools/build/Makefile.build

+14 −0
Original line number Diff line number Diff line
@@ -76,6 +76,14 @@ quiet_cmd_host_ld_multi = HOSTLD $@ 
      cmd_host_ld_multi = $(if $(strip $(obj-y)),\

                          $(HOSTLD) -r -o $@  $(filter $(obj-y),$^),rm -f $@; $(HOSTAR) rcs $@)



rust_common_cmd = \

	$(RUSTC) $(rust_flags) \

	--crate-type staticlib -L $(objtree)/rust/ \

	--emit=dep-info=$(depfile),link



quiet_cmd_rustc_a_rs = $(RUSTC) $(quiet_modtag) $@

      cmd_rustc_a_rs = $(rust_common_cmd) -o $@ -g $< $(cmd_objtool)



ifneq ($(filter $(obj),$(hostprogs)),)

  host = host_

endif
@@ -105,6 +113,12 @@ $(OUTPUT)%.s: %.c FORCE 
	$(call rule_mkdir)

	$(call if_changed_dep,cc_s_c)



# it's recommended to build a static rust library, when a foreight (to rust)

# linker is used.

$(OUTPUT)%.a: %.rs FORCE

	$(call rule_mkdir)

	$(call if_changed_dep,rustc_a_rs)



# bison and flex files are generated in the OUTPUT directory

# so it needs a separate rule to depend on them properly

$(OUTPUT)%-bison.o: $(OUTPUT)%-bison.c FORCE

tools/perf/Makefile.perf

+1 −1
Original line number Diff line number Diff line
@@ -271,7 +271,7 @@ ifeq ($(PYLINT),1) 
  PYLINT := $(shell which pylint 2> /dev/null)

endif



export srctree OUTPUT RM CC CXX LD AR CFLAGS CXXFLAGS V BISON FLEX AWK

export srctree OUTPUT RM CC CXX RUSTC LD AR CFLAGS CXXFLAGS V BISON FLEX AWK

export HOSTCC HOSTLD HOSTAR HOSTCFLAGS SHELLCHECK MYPY PYLINT



include $(srctree)/tools/build/Makefile.include

tools/perf/tests/builtin-test.c

+4 −0
Original line number Diff line number Diff line
@@ -154,6 +154,10 @@ static struct test_workload *workloads[] = { 
	&workload__landlock,

	&workload__traploop,

	&workload__inlineloop,



#ifdef HAVE_RUST_SUPPORT

	&workload__code_with_type,

#endif

};



#define workloads__for_each(workload) \

tools/perf/tests/tests.h

+4 −0
Original line number Diff line number Diff line
@@ -242,6 +242,10 @@ DECLARE_WORKLOAD(landlock); 
DECLARE_WORKLOAD(traploop);

DECLARE_WORKLOAD(inlineloop);



#ifdef HAVE_RUST_SUPPORT

DECLARE_WORKLOAD(code_with_type);

#endif



extern const char *dso_to_test;

extern const char *test_objdump_path;

tools/perf/tests/workloads/Build

+5 −0
Original line number Diff line number Diff line
@@ -10,6 +10,11 @@ perf-test-y += landlock.o 
perf-test-y += traploop.o

perf-test-y += inlineloop.o



ifeq ($(CONFIG_RUST_SUPPORT),y)

    perf-test-y += code_with_type.o

    perf-test-y += code_with_type.a

endif



CFLAGS_sqrtloop.o         = -g -O0 -fno-inline -U_FORTIFY_SOURCE

CFLAGS_leafloop.o         = -g -O0 -fno-inline -fno-omit-frame-pointer -U_FORTIFY_SOURCE

CFLAGS_brstack.o          = -g -O0 -fno-inline -U_FORTIFY_SOURCE