Perf test - Verify kernel and userspace perf CoreSight work
-----------------------------------------------------------
-When you run perf test, it will do a lot of self tests. Some of those
-tests will cover CoreSight (only if enabled and on ARM64). You
-generally would run perf test from the tools/perf directory in the
-kernel tree. Some tests will check some internal perf support like:
-
- Check Arm CoreSight trace data recording and synthesized samples
- Check Arm SPE trace data recording and synthesized samples
-
-Some others will actually use perf record and some test binaries that
-are in tests/shell/coresight and will collect traces to ensure a
-minimum level of functionality is met. The scripts that launch these
-tests are in the same directory. These will all look like:
-
- CoreSight / ASM Pure Loop
- CoreSight / Memcpy 16k 10 Threads
- CoreSight / Thread Loop 10 Threads - Check TID
- etc.
-
-These perf record tests will not run if the tool binaries do not exist
-in tests/shell/coresight/\*/ and will be skipped. If you do not have
-CoreSight support in hardware then either do not build perf with
-CoreSight support or remove these binaries in order to not have these
-tests fail and have them skip instead.
-
-These tests will log historical results in the current working
-directory (e.g. tools/perf) and will be named stats-\*.csv like:
-
- stats-asm_pure_loop-out.csv
- stats-memcpy_thread-16k_10.csv
- ...
-
-These statistic files log some aspects of the AUX data sections in
-the perf data output counting some numbers of certain encodings (a
-good way to know that it's working in a very simple way). One problem
-with CoreSight is that given a large enough amount of data needing to
-be logged, some of it can be lost due to the processor not waking up
-in time to read out all the data from buffers etc.. You will notice
-that the amount of data collected can vary a lot per run of perf test.
-If you wish to see how this changes over time, simply run perf test
-multiple times and all these csv files will have more and more data
-appended to it that you can later examine, graph and otherwise use to
-figure out if things have become worse or better.
-
-This means sometimes these tests fail as they don't capture all the
-data needed. This is about tracking quality and amount of data
-produced over time and to see when changes to the Linux kernel improve
-quality of traces.
-
-Be aware that some of these tests take quite a while to run, specifically
-in processing the perf data file and dumping contents to then examine what
-is inside.
-
-You can change where these csv logs are stored by setting the
-PERF_TEST_CORESIGHT_STATDIR environment variable before running perf
-test like::
-
- export PERF_TEST_CORESIGHT_STATDIR=/var/tmp
- perf test
-
-They will also store resulting perf output data in the current
-directory for later inspection like::
-
- perf-asm_pure_loop-out.data
- perf-memcpy_thread-16k_10.data
- ...
-
-You can alter where the perf data files are stored by setting the
-PERF_TEST_CORESIGHT_DATADIR environment variable such as::
-
- PERF_TEST_CORESIGHT_DATADIR=/var/tmp
- perf test
-
-You may wish to set these above environment variables if you wish to
-keep the output of tests outside of the current working directory for
-longer term storage and examination.
+There are a set of Perf tests for CoreSight which can be run with::
+
+ sudo perf test coresight
F: tools/perf/arch/arm/util/pmu.c
F: tools/perf/tests/shell/*coresight*
F: tools/perf/tests/shell/coresight/*
-F: tools/perf/tests/shell/lib/*coresight*
F: tools/perf/util/cs-etm-decoder/*
F: tools/perf/util/cs-etm.*
$(Q)$(MAKE) -C $(arm64_gen_sysreg_dir) O=$(arm64_gen_sysreg_outdir) \
prefix= subdir= clean > /dev/null
-TESTS_CORESIGHT_DIR := $(srctree)/tools/perf/tests/shell/coresight
-
-tests-coresight-targets: FORCE
- $(Q)$(MAKE) -C $(TESTS_CORESIGHT_DIR)
-
-tests-coresight-targets-clean:
- $(call QUIET_CLEAN, coresight)
- $(Q)$(MAKE) -C $(TESTS_CORESIGHT_DIR) O=$(OUTPUT) clean >/dev/null
-
-all: shell_compatibility_test $(ALL_PROGRAMS) $(LANG_BINDINGS) $(OTHER_PROGRAMS) tests-coresight-targets
+all: shell_compatibility_test $(ALL_PROGRAMS) $(LANG_BINDINGS) $(OTHER_PROGRAMS)
# Create python binding output directory if not already present
$(shell [ -d '$(OUTPUT)python' ] || mkdir -p '$(OUTPUT)python')
$(INSTALL) tests/shell/base_report/*.txt '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/base_report'; \
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/coresight' ; \
$(INSTALL) tests/shell/coresight/*.sh '$(DESTDIR_SQ)$(perfexec_instdir_SQ)/tests/shell/coresight'
- $(Q)$(MAKE) -C tests/shell/coresight install-tests
install-bin: install-tools install-tests
clean:: $(LIBAPI)-clean $(LIBBPF)-clean $(LIBSUBCMD)-clean $(LIBSYMBOL)-clean $(LIBPERF)-clean \
arm64-sysreg-defs-clean fixdep-clean python-clean bpf-skel-clean \
- tests-coresight-targets-clean pmu-events-clean
+ pmu-events-clean
$(call QUIET_CLEAN, core-objs) $(RM) $(LIBPERF_A) $(OUTPUT)perf-archive \
$(OUTPUT)perf-iostat $(LANG_BINDINGS)
$(Q)find $(or $(OUTPUT),.) -name '*.o' -delete -o -name '*.a' -delete -o \
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
-include ../../../../../tools/scripts/Makefile.include
-include ../../../../../tools/scripts/Makefile.arch
-include ../../../../../tools/scripts/utilities.mak
-
-SUBDIRS = \
- asm_pure_loop \
- memcpy_thread \
- thread_loop \
- unroll_loop_thread
-
-all: $(SUBDIRS)
-$(SUBDIRS):
- @$(MAKE) -C $@ >/dev/null
-
-INSTALLDIRS = $(SUBDIRS:%=install-%)
-
-install-tests: $(INSTALLDIRS)
-$(INSTALLDIRS):
- @$(MAKE) -C $(@:install-%=%) install-tests >/dev/null
-
-CLEANDIRS = $(SUBDIRS:%=clean-%)
-
-clean: $(CLEANDIRS)
-$(CLEANDIRS):
- $(call QUIET_CLEAN, test-$(@:clean-%=%)) $(MAKE) -C $(@:clean-%=%) clean >/dev/null
-
-.PHONY: all clean $(SUBDIRS) $(CLEANDIRS) $(INSTALLDIRS)
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0-only
-# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
-
-ifndef DESTDIR
-prefix ?= $(HOME)
-endif
-
-DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
-INSTALL = install
-INSTDIR_SUB = tests/shell/coresight
-
-include ../../../../../scripts/Makefile.include
-include ../../../../../scripts/Makefile.arch
-include ../../../../../scripts/utilities.mak
+++ /dev/null
-asm_pure_loop
+++ /dev/null
-# 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
+++ /dev/null
-/* 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
-
-.section .note.GNU-stack, "", @progbits
+++ /dev/null
-memcpy_thread
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
-include ../Makefile.miniconfig
-
-# Binary to produce
-BIN=memcpy_thread
-# Any linking/libraries needed for the binary - empty if none needed
-LIB=-pthread
-
-all: $(BIN)
-
-$(BIN): $(BIN).c
-ifdef CORESIGHT
-ifeq ($(ARCH),arm64)
-# Build line
- $(Q)$(CC) $(BIN).c -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
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-// Carsten Haitzler <carsten.haitzler@arm.com>, 2021
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <pthread.h>
-
-struct args {
- unsigned long loops;
- unsigned long size;
- pthread_t th;
- void *ret;
-};
-
-static void *thrfn(void *arg)
-{
- struct args *a = arg;
- unsigned long i, len = a->loops;
- unsigned char *src, *dst;
-
- src = malloc(a->size * 1024);
- dst = malloc(a->size * 1024);
- if ((!src) || (!dst)) {
- printf("ERR: Can't allocate memory\n");
- exit(1);
- }
- for (i = 0; i < len; i++)
- memcpy(dst, src, a->size * 1024);
-
- return NULL;
-}
-
-static pthread_t new_thr(void *(*fn) (void *arg), void *arg)
-{
- pthread_t t;
- pthread_attr_t attr;
-
- pthread_attr_init(&attr);
- pthread_create(&t, &attr, fn, arg);
- return t;
-}
-
-int main(int argc, char **argv)
-{
- unsigned long i, len, size, thr;
- struct args args[256];
- long long v;
-
- if (argc < 4) {
- printf("ERR: %s [copysize Kb] [numthreads] [numloops (hundreds)]\n", argv[0]);
- exit(1);
- }
-
- v = atoll(argv[1]);
- if ((v < 1) || (v > (1024 * 1024))) {
- printf("ERR: max memory 1GB (1048576 KB)\n");
- exit(1);
- }
- size = v;
- thr = atol(argv[2]);
- if ((thr < 1) || (thr > 256)) {
- printf("ERR: threads 1-256\n");
- exit(1);
- }
- v = atoll(argv[3]);
- if ((v < 1) || (v > 40000000000ll)) {
- printf("ERR: loops 1-40000000000 (hundreds)\n");
- exit(1);
- }
- len = v * 100;
- for (i = 0; i < thr; i++) {
- args[i].loops = len;
- args[i].size = size;
- args[i].th = new_thr(thrfn, &(args[i]));
- }
- for (i = 0; i < thr; i++)
- pthread_join(args[i].th, &(args[i].ret));
- return 0;
-}
+++ /dev/null
-thread_loop
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
-include ../Makefile.miniconfig
-
-# Binary to produce
-BIN=thread_loop
-# Any linking/libraries needed for the binary - empty if none needed
-LIB=-pthread
-
-all: $(BIN)
-
-$(BIN): $(BIN).c
-ifdef CORESIGHT
-ifeq ($(ARCH),arm64)
-# Build line
- $(Q)$(CC) $(BIN).c -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
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-// Carsten Haitzler <carsten.haitzler@arm.com>, 2021
-
-// define this for gettid()
-#define _GNU_SOURCE
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <pthread.h>
-#include <sys/syscall.h>
-#ifndef SYS_gettid
-// gettid is 178 on arm64
-# define SYS_gettid 178
-#endif
-#define gettid() syscall(SYS_gettid)
-
-struct args {
- unsigned int loops;
- pthread_t th;
- void *ret;
-};
-
-static void *thrfn(void *arg)
-{
- struct args *a = arg;
- int i = 0, len = a->loops;
-
- if (getenv("SHOW_TID")) {
- unsigned long long tid = gettid();
-
- printf("%llu\n", tid);
- }
- asm volatile(
- "loop:\n"
- "add %w[i], %w[i], #1\n"
- "cmp %w[i], %w[len]\n"
- "blt loop\n"
- : /* out */
- : /* in */ [i] "r" (i), [len] "r" (len)
- : /* clobber */
- );
- return (void *)(long)i;
-}
-
-static pthread_t new_thr(void *(*fn) (void *arg), void *arg)
-{
- pthread_t t;
- pthread_attr_t attr;
-
- pthread_attr_init(&attr);
- pthread_create(&t, &attr, fn, arg);
- return t;
-}
-
-int main(int argc, char **argv)
-{
- unsigned int i, len, thr;
- struct args args[256];
-
- if (argc < 3) {
- printf("ERR: %s [numthreads] [numloops (millions)]\n", argv[0]);
- exit(1);
- }
-
- thr = atoi(argv[1]);
- if ((thr < 1) || (thr > 256)) {
- printf("ERR: threads 1-256\n");
- exit(1);
- }
- len = atoi(argv[2]);
- if ((len < 1) || (len > 4000)) {
- printf("ERR: max loops 4000 (millions)\n");
- exit(1);
- }
- len *= 1000000;
- for (i = 0; i < thr; i++) {
- args[i].loops = len;
- args[i].th = new_thr(thrfn, &(args[i]));
- }
- for (i = 0; i < thr; i++)
- pthread_join(args[i].th, &(args[i].ret));
- return 0;
-}
+++ /dev/null
-unroll_loop_thread
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
-include ../Makefile.miniconfig
-
-# Binary to produce
-BIN=unroll_loop_thread
-# Any linking/libraries needed for the binary - empty if none needed
-LIB=-pthread
-
-all: $(BIN)
-
-$(BIN): $(BIN).c
-ifdef CORESIGHT
-ifeq ($(ARCH),arm64)
-# Build line
- $(Q)$(CC) $(BIN).c -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
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0
-// Carsten Haitzler <carsten.haitzler@arm.com>, 2021
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <pthread.h>
-
-struct args {
- pthread_t th;
- unsigned int in;
- void *ret;
-};
-
-static void *thrfn(void *arg)
-{
- struct args *a = arg;
- unsigned int i, in = a->in;
-
- for (i = 0; i < 10000; i++) {
- asm volatile (
-// force an unroll of thia add instruction so we can test long runs of code
-#define SNIP1 "add %w[in], %w[in], #1\n"
-// 10
-#define SNIP2 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1 SNIP1
-// 100
-#define SNIP3 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2 SNIP2
-// 1000
-#define SNIP4 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3 SNIP3
-// 10000
-#define SNIP5 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4 SNIP4
-// 100000
- SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5 SNIP5
- : /* out */
- : /* in */ [in] "r" (in)
- : /* clobber */
- );
- }
-
- return NULL;
-}
-
-static pthread_t new_thr(void *(*fn) (void *arg), void *arg)
-{
- pthread_t t;
- pthread_attr_t attr;
-
- pthread_attr_init(&attr);
- pthread_create(&t, &attr, fn, arg);
- return t;
-}
-
-int main(int argc, char **argv)
-{
- unsigned int i, thr;
- struct args args[256];
-
- if (argc < 2) {
- printf("ERR: %s [numthreads]\n", argv[0]);
- exit(1);
- }
-
- thr = atoi(argv[1]);
- if ((thr > 256) || (thr < 1)) {
- printf("ERR: threads 1-256\n");
- exit(1);
- }
- for (i = 0; i < thr; i++) {
- args[i].in = rand();
- args[i].th = new_thr(thrfn, &(args[i]));
- }
- for (i = 0; i < thr; i++)
- pthread_join(args[i].th, &(args[i].ret));
- return 0;
-}
+++ /dev/null
-# SPDX-License-Identifier: GPL-2.0
-# Carsten Haitzler <carsten.haitzler@arm.com>, 2021
-
-# This is sourced from a driver script so no need for #!/bin... etc. at the
-# top - the assumption below is that it runs as part of sourcing after the
-# test sets up some basic env vars to say what it is.
-
-# This currently works with ETMv4 / ETF not any other packet types at thi
-# point. This will need changes if that changes.
-
-# perf record options for the perf tests to use
-PERFRECMEM="-m ,16M"
-PERFRECOPT="$PERFRECMEM -e cs_etm//u"
-
-TOOLS=$(dirname $0)
-DIR="$TOOLS/$TEST"
-BIN="$DIR/$TEST"
-# If the test tool/binary does not exist and is executable then skip the test
-if ! test -x "$BIN"; then exit 2; fi
-# If CoreSight is not available, skip the test
-perf list pmu | grep -q cs_etm || exit 2
-DATD="."
-# If the data dir env is set then make the data dir use that instead of ./
-if test -n "$PERF_TEST_CORESIGHT_DATADIR"; then
- DATD="$PERF_TEST_CORESIGHT_DATADIR";
-fi
-# If the stat dir env is set then make the data dir use that instead of ./
-STATD="."
-if test -n "$PERF_TEST_CORESIGHT_STATDIR"; then
- STATD="$PERF_TEST_CORESIGHT_STATDIR";
-fi
-
-# Called if the test fails - error code 1
-err() {
- echo "$1"
- exit 1
-}
-
-# Check that some statistics from our perf
-check_val_min() {
- STATF="$4"
- if test "$2" -lt "$3"; then
- echo ", FAILED" >> "$STATF"
- err "Sanity check number of $1 is too low ($2 < $3)"
- fi
-}
-
-perf_dump_aux_verify() {
- # Some basic checking that the AUX chunk contains some sensible data
- # to see that we are recording something and at least a minimum
- # amount of it. We should almost always see Fn packets in just about
- # anything but certainly we will see some trace info and async
- # packets
- DUMP="$DATD/perf-tmp-aux-dump.txt"
- perf report --stdio --dump -i "$1" | \
- grep -o -e I_ATOM_F -e I_ASYNC -e I_TRACE_INFO > "$DUMP"
- # Simply count how many of these packets we find to see that we are
- # producing a reasonable amount of data - exact checks are not sane
- # as this is a lossy process where we may lose some blocks and the
- # compiler may produce different code depending on the compiler and
- # optimization options, so this is rough just to see if we're
- # either missing almost all the data or all of it
- ATOM_FX_NUM=$(grep -c I_ATOM_F "$DUMP")
- ASYNC_NUM=$(grep -c I_ASYNC "$DUMP")
- TRACE_INFO_NUM=$(grep -c I_TRACE_INFO "$DUMP")
- rm -f "$DUMP"
-
- # Arguments provide minimums for a pass
- CHECK_FX_MIN="$2"
- CHECK_ASYNC_MIN="$3"
- CHECK_TRACE_INFO_MIN="$4"
-
- # Write out statistics, so over time you can track results to see if
- # there is a pattern - for example we have less "noisy" results that
- # produce more consistent amounts of data each run, to see if over
- # time any techinques to minimize data loss are having an effect or
- # not
- STATF="$STATD/stats-$TEST-$DATV.csv"
- if ! test -f "$STATF"; then
- echo "ATOM Fx Count, Minimum, ASYNC Count, Minimum, TRACE INFO Count, Minimum" > "$STATF"
- fi
- echo -n "$ATOM_FX_NUM, $CHECK_FX_MIN, $ASYNC_NUM, $CHECK_ASYNC_MIN, $TRACE_INFO_NUM, $CHECK_TRACE_INFO_MIN" >> "$STATF"
-
- # Actually check to see if we passed or failed.
- check_val_min "ATOM_FX" "$ATOM_FX_NUM" "$CHECK_FX_MIN" "$STATF"
- check_val_min "ASYNC" "$ASYNC_NUM" "$CHECK_ASYNC_MIN" "$STATF"
- check_val_min "TRACE_INFO" "$TRACE_INFO_NUM" "$CHECK_TRACE_INFO_MIN" "$STATF"
- echo ", Ok" >> "$STATF"
-}
-
-perf_dump_aux_tid_verify() {
- # Specifically crafted test will produce a list of Tread ID's to
- # stdout that need to be checked to see that they have had trace
- # info collected in AUX blocks in the perf data. This will go
- # through all the TID's that are listed as CID=0xabcdef and see
- # that all the Thread IDs the test tool reports are in the perf
- # data AUX chunks
-
- # The TID test tools will print a TID per stdout line that are being
- # tested
- TIDS=$(cat "$2")
- # Scan the perf report to find the TIDs that are actually CID in hex
- # and build a list of the ones found
- FOUND_TIDS=$(perf report --stdio --dump -i "$1" | \
- grep -o "CID=0x[0-9a-z]\+" | sed 's/CID=//g' | \
- uniq | sort | uniq)
- # No CID=xxx found - maybe your kernel is reporting these as
- # VMID=xxx so look there
- if test -z "$FOUND_TIDS"; then
- FOUND_TIDS=$(perf report --stdio --dump -i "$1" | \
- grep -o "VMID=0x[0-9a-z]\+" | sed 's/VMID=//g' | \
- uniq | sort | uniq)
- fi
-
- # Iterate over the list of TIDs that the test says it has and find
- # them in the TIDs found in the perf report
- MISSING=""
- for TID2 in $TIDS; do
- FOUND=""
- for TIDHEX in $FOUND_TIDS; do
- TID=$(printf "%i" $TIDHEX)
- if test "$TID" -eq "$TID2"; then
- FOUND="y"
- break
- fi
- done
- if test -z "$FOUND"; then
- MISSING="$MISSING $TID"
- fi
- done
- if test -n "$MISSING"; then
- err "Thread IDs $MISSING not found in perf AUX data"
- fi
-}
projects / thirdparty / kernel / linux.git / commitdiff
