From f034fc50d3c7d9385c20d505ab4cf56b8fd18ac7 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Mon, 11 Apr 2022 09:17:58 +0300 Subject: perf tools: Fix misleading add event PMU debug message Fix incorrect debug message: Attempting to add event pmu 'intel_pt' with '' that may result in non-fatal errors which always appears with perf record -vv and intel_pt e.g. perf record -vv -e intel_pt//u uname The message is incorrect because there will never be non-fatal errors. Suppress the message if the PMU is 'selectable' i.e. meant to be selected directly as an event. Fixes: 4ac22b484d4c79e8 ("perf parse-events: Make add PMU verbose output clearer") Signed-off-by: Adrian Hunter Cc: Ian Rogers Cc: Jiri Olsa Link: http://lore.kernel.org/lkml/20220411061758.2458417-1-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/parse-events.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'tools/perf/util') diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index 24997925ae00..dd84fed698a3 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -1523,7 +1523,9 @@ int parse_events_add_pmu(struct parse_events_state *parse_state, bool use_uncore_alias; LIST_HEAD(config_terms); - if (verbose > 1) { + pmu = parse_state->fake_pmu ?: perf_pmu__find(name); + + if (verbose > 1 && !(pmu && pmu->selectable)) { fprintf(stderr, "Attempting to add event pmu '%s' with '", name); if (head_config) { @@ -1536,7 +1538,6 @@ int parse_events_add_pmu(struct parse_events_state *parse_state, fprintf(stderr, "' that may result in non-fatal errors\n"); } - pmu = parse_state->fake_pmu ?: perf_pmu__find(name); if (!pmu) { char *err_str; -- cgit v1.2.3 From d73f5d14e0cdd1f39764379250f26163913d7155 Mon Sep 17 00:00:00 2001 From: Lv Ruyi Date: Wed, 13 Apr 2022 09:33:02 +0000 Subject: perf stat: Fix error check return value of hashmap__new(), must use IS_ERR() hashmap__new() returns ERR_PTR(-ENOMEM) when it fails, so we should use IS_ERR() to check it in error handling path. Reported-by: Zeal Robot Signed-off-by: Lv Ruyi Cc: Alexander Shishkin Cc: Ian Rogers Cc: Ingo Molnar Cc: James Clark Cc: Jiri Olsa Cc: Mark Rutland Cc: Namhyung Kim Cc: Peter Zijlstra Link: https://lore.kernel.org/r/20220413093302.2538128-1-lv.ruyi@zte.com.cn Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/stat.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'tools/perf/util') diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c index ee6f03481215..817a2de264b4 100644 --- a/tools/perf/util/stat.c +++ b/tools/perf/util/stat.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 #include +#include #include #include #include @@ -311,7 +312,7 @@ static int check_per_pkg(struct evsel *counter, struct perf_counts_values *vals, if (!mask) { mask = hashmap__new(pkg_id_hash, pkg_id_equal, NULL); - if (!mask) + if (IS_ERR(mask)) return -ENOMEM; counter->per_pkg_mask = mask; -- cgit v1.2.3 From 8cb7a188ac33b71ec24a9081d1521f46dcab53c4 Mon Sep 17 00:00:00 2001 From: Athira Rajeev Date: Tue, 12 Apr 2022 22:10:58 +0530 Subject: perf bench: Fix numa testcase to check if CPU used to bind task is online Perf numa bench test fails with error: Testcase: ./perf bench numa mem -p 2 -t 1 -P 1024 -C 0,8 -M 1,0 -s 20 -zZq --thp 1 --no-data_rand_walk Failure snippet: <<>> Running 'numa/mem' benchmark: # Running main, "perf bench numa numa-mem -p 2 -t 1 -P 1024 -C 0,8 -M 1,0 -s 20 -zZq --thp 1 --no-data_rand_walk" perf: bench/numa.c:333: bind_to_cpumask: Assertion `!(ret)' failed. <<>> The Testcases uses CPU's 0 and 8. In function "parse_setup_cpu_list", There is check to see if cpu number is greater than max cpu's possible in the system ie via "if (bind_cpu_0 >= g->p.nr_cpus || bind_cpu_1 >= g->p.nr_cpus) {". But it could happen that system has say 48 CPU's, but only number of online CPU's is 0-7. Other CPU's are offlined. Since "g->p.nr_cpus" is 48, so function will go ahead and set bit for CPU 8 also in cpumask ( td->bind_cpumask). bind_to_cpumask function is called to set affinity using sched_setaffinity and the cpumask. Since the CPU8 is not present, set affinity will fail here with EINVAL. Fix this issue by adding a check to make sure that, CPU's provided in the input argument values are online before proceeding further and skip the test. For this, include new helper function "is_cpu_online" in "tools/perf/util/header.c". Since "BIT(x)" definition will get included from header.h, remove that from bench/numa.c Reported-by: Disha Goel Signed-off-by: Athira Jajeev Tested-by: Disha Goel Cc: Ian Rogers Cc: Jiri Olsa Cc: Kajol Jain Cc: Madhavan Srinivasan Cc: Michael Ellerman Cc: Nageswara R Sastry Cc: Srikar Dronamraju Cc: linuxppc-dev@lists.ozlabs.org Link: https://lore.kernel.org/r/20220412164059.42654-2-atrajeev@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/bench/numa.c | 8 ++++++-- tools/perf/util/header.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/header.h | 1 + 3 files changed, 58 insertions(+), 2 deletions(-) (limited to 'tools/perf/util') diff --git a/tools/perf/bench/numa.c b/tools/perf/bench/numa.c index f2640179ada9..c838c248aa2c 100644 --- a/tools/perf/bench/numa.c +++ b/tools/perf/bench/numa.c @@ -34,6 +34,7 @@ #include #include +#include "../util/header.h" #include #include @@ -585,6 +586,11 @@ static int parse_setup_cpu_list(void) return -1; } + if (is_cpu_online(bind_cpu_0) != 1 || is_cpu_online(bind_cpu_1) != 1) { + printf("\nTest not applicable, bind_cpu_0 or bind_cpu_1 is offline\n"); + return -1; + } + BUG_ON(bind_cpu_0 < 0 || bind_cpu_1 < 0); BUG_ON(bind_cpu_0 > bind_cpu_1); @@ -752,8 +758,6 @@ static int parse_nodes_opt(const struct option *opt __maybe_unused, return parse_node_list(arg); } -#define BIT(x) (1ul << x) - static inline uint32_t lfsr_32(uint32_t lfsr) { const uint32_t taps = BIT(1) | BIT(5) | BIT(6) | BIT(31); diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index d546ff724dbe..a27132e5a5ef 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -983,6 +983,57 @@ static int write_dir_format(struct feat_fd *ff, return do_write(ff, &data->dir.version, sizeof(data->dir.version)); } +/* + * Check whether a CPU is online + * + * Returns: + * 1 -> if CPU is online + * 0 -> if CPU is offline + * -1 -> error case + */ +int is_cpu_online(unsigned int cpu) +{ + char *str; + size_t strlen; + char buf[256]; + int status = -1; + struct stat statbuf; + + snprintf(buf, sizeof(buf), + "/sys/devices/system/cpu/cpu%d", cpu); + if (stat(buf, &statbuf) != 0) + return 0; + + /* + * Check if /sys/devices/system/cpu/cpux/online file + * exists. Some cases cpu0 won't have online file since + * it is not expected to be turned off generally. + * In kernels without CONFIG_HOTPLUG_CPU, this + * file won't exist + */ + snprintf(buf, sizeof(buf), + "/sys/devices/system/cpu/cpu%d/online", cpu); + if (stat(buf, &statbuf) != 0) + return 1; + + /* + * Read online file using sysfs__read_str. + * If read or open fails, return -1. + * If read succeeds, return value from file + * which gets stored in "str" + */ + snprintf(buf, sizeof(buf), + "devices/system/cpu/cpu%d/online", cpu); + + if (sysfs__read_str(buf, &str, &strlen) < 0) + return status; + + status = atoi(str); + + free(str); + return status; +} + #ifdef HAVE_LIBBPF_SUPPORT static int write_bpf_prog_info(struct feat_fd *ff, struct evlist *evlist __maybe_unused) diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h index c9e3265832d9..0eb4bc29a5a4 100644 --- a/tools/perf/util/header.h +++ b/tools/perf/util/header.h @@ -158,6 +158,7 @@ int do_write(struct feat_fd *fd, const void *buf, size_t size); int write_padded(struct feat_fd *fd, const void *bf, size_t count, size_t count_aligned); +int is_cpu_online(unsigned int cpu); /* * arch specific callback */ -- cgit v1.2.3 From d22588d73b18fd12fd971e2dab7fa5ddf978e496 Mon Sep 17 00:00:00 2001 From: Guilherme Amadio Date: Sat, 16 Apr 2022 09:45:55 +0200 Subject: perf clang: Fix header include for LLVM >= 14 The header TargetRegistry.h has moved in LLVM/clang 14. Committer notes: The problem as noticed when building in ubuntu:22.04: 90 98.61 ubuntu:22.04 : FAIL gcc version 11.2.0 (Ubuntu 11.2.0-19ubuntu1) util/c++/clang.cpp:23:10: fatal error: llvm/Support/TargetRegistry.h: No such file or directory 23 | #include "llvm/Support/TargetRegistry.h" | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ compilation terminated. Fixed after applying this patch. Reported-by: Arnaldo Carvalho de Melo Signed-off-by: Guilherme Amadio Tested-by: Arnaldo Carvalho de Melo Link: https://twitter.com/GuilhermeAmadio/status/1514970524232921088 Link: http://lore.kernel.org/lkml/Ylp0M/VYgHOxtcnF@gentoo.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/c++/clang.cpp | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'tools/perf/util') diff --git a/tools/perf/util/c++/clang.cpp b/tools/perf/util/c++/clang.cpp index df7b18fb6b6e..1aad7d6d34aa 100644 --- a/tools/perf/util/c++/clang.cpp +++ b/tools/perf/util/c++/clang.cpp @@ -20,7 +20,11 @@ #include "llvm/Option/Option.h" #include "llvm/Support/FileSystem.h" #include "llvm/Support/ManagedStatic.h" +#if CLANG_VERSION_MAJOR >= 14 +#include "llvm/MC/TargetRegistry.h" +#else #include "llvm/Support/TargetRegistry.h" +#endif #include "llvm/Support/TargetSelect.h" #include "llvm/Target/TargetMachine.h" #include "llvm/Target/TargetOptions.h" -- cgit v1.2.3