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perf test: Add asm pureloop test tool

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Add test tool to be driven by further test scripts. This tool is pure
arm64 ASM with no libc usage to ensure it is the same exact binary/code
every time so it can also be re-used for many uses. It just loops for a
given fixed number of loops.

Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Carsten Haitzler <carsten.haitzler@arm.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: coresight@lists.linaro.org
Link: https://lore.kernel.org/r/20220909152803.2317006-4-carsten.haitzler@foss.arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Carsten Haitzler 2022-09-09 16:27:53 +01:00 committed by Arnaldo Carvalho de Melo
parent 34bec35cbb
commit 8b97519711
4 changed files with 65 additions and 1 deletions
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3
tools/perf/tests/shell/coresight/Makefile
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@ -4,7 +4,8 @@ include ../../../../../tools/scripts/Makefile.include
include ../../../../../tools/scripts/Makefile.arch
include ../../../../../tools/scripts/utilities.mak
SUBDIRS =
SUBDIRS = \
asm_pure_loop
all: $(SUBDIRS)
$(SUBDIRS):

1
tools/perf/tests/shell/coresight/asm_pure_loop/.gitignore vendored Normal file
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@ -0,0 +1 @@
asm_pure_loop

34
tools/perf/tests/shell/coresight/asm_pure_loop/Makefile Normal file
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@ -0,0 +1,34 @@
# SPDX-License-Identifier: GPL-2.0
# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
include ../Makefile.miniconfig
# Binary to produce
BIN=asm_pure_loop
# Any linking/libraries needed for the binary - empty if none needed
LIB=
all: $(BIN)
$(BIN): $(BIN).S
ifdef CORESIGHT
ifeq ($(ARCH),arm64)
# Build line - this is raw asm with no libc to have an always exact binary
$(Q)$(CC) $(BIN).S -nostdlib -static -o $(BIN) $(LIB)
endif
endif
install-tests: all
ifdef CORESIGHT
ifeq ($(ARCH),arm64)
# Install the test tool in the right place
$(call QUIET_INSTALL, tests) \
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/$(INSTDIR_SUB)/$(BIN)'; \
$(INSTALL) $(BIN) '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/$(INSTDIR_SUB)/$(BIN)/$(BIN)'
endif
endif
clean:
$(Q)$(RM) -f $(BIN)
.PHONY: all clean install-tests

28
tools/perf/tests/shell/coresight/asm_pure_loop/asm_pure_loop.S Normal file
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@ -0,0 +1,28 @@
/* SPDX-License-Identifier: GPL-2.0 */
/* Tamas Zsoldos <tamas.zsoldos@arm.com>, 2021 */
.globl _start
_start:
mov x0, 0x0000ffff
mov x1, xzr
loop:
nop
nop
cbnz x1, noskip
nop
nop
adrp x2, skip
add x2, x2, :lo12:skip
br x2
nop
nop
noskip:
nop
nop
skip:
sub x0, x0, 1
cbnz x0, loop
mov x0, #0
mov x8, #93 // __NR_exit syscall
svc #0