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-rw-r--r--tools/perf/util/bpf_skel/bperf.h14
-rw-r--r--tools/perf/util/bpf_skel/bperf_follower.bpf.c19
-rw-r--r--tools/perf/util/bpf_skel/bperf_leader.bpf.c19
-rw-r--r--tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c2
-rw-r--r--tools/perf/util/debug.c19
-rw-r--r--tools/perf/util/event.h5
-rw-r--r--tools/perf/util/expr.c12
-rw-r--r--tools/perf/util/header.c15
-rw-r--r--tools/perf/util/intel-pt-decoder/intel-pt-decoder.c85
-rw-r--r--tools/perf/util/intel-pt.c2
-rw-r--r--tools/perf/util/perf_regs.c3
-rw-r--r--tools/perf/util/pmu.c23
-rw-r--r--tools/perf/util/python.c2
-rw-r--r--tools/perf/util/smt.c2
14 files changed, 133 insertions, 89 deletions
diff --git a/tools/perf/util/bpf_skel/bperf.h b/tools/perf/util/bpf_skel/bperf.h
deleted file mode 100644
index 186a5551ddb9..000000000000
--- a/tools/perf/util/bpf_skel/bperf.h
+++ /dev/null
@@ -1,14 +0,0 @@
-// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
-// Copyright (c) 2021 Facebook
-
-#ifndef __BPERF_STAT_H
-#define __BPERF_STAT_H
-
-typedef struct {
- __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
- __uint(key_size, sizeof(__u32));
- __uint(value_size, sizeof(struct bpf_perf_event_value));
- __uint(max_entries, 1);
-} reading_map;
-
-#endif /* __BPERF_STAT_H */
diff --git a/tools/perf/util/bpf_skel/bperf_follower.bpf.c b/tools/perf/util/bpf_skel/bperf_follower.bpf.c
index b8fa3cb2da23..f193998530d4 100644
--- a/tools/perf/util/bpf_skel/bperf_follower.bpf.c
+++ b/tools/perf/util/bpf_skel/bperf_follower.bpf.c
@@ -1,14 +1,23 @@
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
// Copyright (c) 2021 Facebook
-#include <linux/bpf.h>
-#include <linux/perf_event.h>
+#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
-#include "bperf.h"
#include "bperf_u.h"
-reading_map diff_readings SEC(".maps");
-reading_map accum_readings SEC(".maps");
+struct {
+ __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
+ __uint(key_size, sizeof(__u32));
+ __uint(value_size, sizeof(struct bpf_perf_event_value));
+ __uint(max_entries, 1);
+} diff_readings SEC(".maps");
+
+struct {
+ __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
+ __uint(key_size, sizeof(__u32));
+ __uint(value_size, sizeof(struct bpf_perf_event_value));
+ __uint(max_entries, 1);
+} accum_readings SEC(".maps");
struct {
__uint(type, BPF_MAP_TYPE_HASH);
diff --git a/tools/perf/util/bpf_skel/bperf_leader.bpf.c b/tools/perf/util/bpf_skel/bperf_leader.bpf.c
index 4f70d1459e86..e2a2d4cd7779 100644
--- a/tools/perf/util/bpf_skel/bperf_leader.bpf.c
+++ b/tools/perf/util/bpf_skel/bperf_leader.bpf.c
@@ -1,10 +1,8 @@
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
// Copyright (c) 2021 Facebook
-#include <linux/bpf.h>
-#include <linux/perf_event.h>
+#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
-#include "bperf.h"
struct {
__uint(type, BPF_MAP_TYPE_PERF_EVENT_ARRAY);
@@ -13,8 +11,19 @@ struct {
__uint(map_flags, BPF_F_PRESERVE_ELEMS);
} events SEC(".maps");
-reading_map prev_readings SEC(".maps");
-reading_map diff_readings SEC(".maps");
+struct {
+ __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
+ __uint(key_size, sizeof(__u32));
+ __uint(value_size, sizeof(struct bpf_perf_event_value));
+ __uint(max_entries, 1);
+} prev_readings SEC(".maps");
+
+struct {
+ __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY);
+ __uint(key_size, sizeof(__u32));
+ __uint(value_size, sizeof(struct bpf_perf_event_value));
+ __uint(max_entries, 1);
+} diff_readings SEC(".maps");
SEC("raw_tp/sched_switch")
int BPF_PROG(on_switch)
diff --git a/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c b/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c
index ab12b4c4ece2..97037d3b3d9f 100644
--- a/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c
+++ b/tools/perf/util/bpf_skel/bpf_prog_profiler.bpf.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
// Copyright (c) 2020 Facebook
-#include <linux/bpf.h>
+#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c
index c7a9fa0ffae9..2c06abf6dcd2 100644
--- a/tools/perf/util/debug.c
+++ b/tools/perf/util/debug.c
@@ -24,16 +24,6 @@
#include "util/parse-sublevel-options.h"
#include <linux/ctype.h>
-#include <traceevent/event-parse.h>
-
-#define MAKE_LIBTRACEEVENT_VERSION(a, b, c) ((a)*255*255+(b)*255+(c))
-#ifndef LIBTRACEEVENT_VERSION
-/*
- * If LIBTRACEEVENT_VERSION wasn't computed then set to version 1.1.0 that ships
- * with the Linux kernel tools.
- */
-#define LIBTRACEEVENT_VERSION MAKE_LIBTRACEEVENT_VERSION(1, 1, 0)
-#endif
int verbose;
int debug_peo_args;
@@ -238,15 +228,6 @@ int perf_debug_option(const char *str)
/* Allow only verbose value in range (0, 10), otherwise set 0. */
verbose = (verbose < 0) || (verbose > 10) ? 0 : verbose;
-#if MAKE_LIBTRACEEVENT_VERSION(1, 3, 0) <= LIBTRACEEVENT_VERSION
- if (verbose == 1)
- tep_set_loglevel(TEP_LOG_INFO);
- else if (verbose == 2)
- tep_set_loglevel(TEP_LOG_DEBUG);
- else if (verbose >= 3)
- tep_set_loglevel(TEP_LOG_ALL);
-#endif
-
return 0;
}
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 95ffed66369c..c59331eea1d9 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -44,13 +44,16 @@ struct perf_event_attr;
/* perf sample has 16 bits size limit */
#define PERF_SAMPLE_MAX_SIZE (1 << 16)
+/* number of register is bound by the number of bits in regs_dump::mask (64) */
+#define PERF_SAMPLE_REGS_CACHE_SIZE (8 * sizeof(u64))
+
struct regs_dump {
u64 abi;
u64 mask;
u64 *regs;
/* Cached values/mask filled by first register access. */
- u64 cache_regs[PERF_REGS_MAX];
+ u64 cache_regs[PERF_SAMPLE_REGS_CACHE_SIZE];
u64 cache_mask;
};
diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
index 1d532b9fed29..666b59baeb70 100644
--- a/tools/perf/util/expr.c
+++ b/tools/perf/util/expr.c
@@ -12,6 +12,7 @@
#include "expr-bison.h"
#include "expr-flex.h"
#include "smt.h"
+#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/zalloc.h>
#include <ctype.h>
@@ -65,7 +66,12 @@ static bool key_equal(const void *key1, const void *key2,
struct hashmap *ids__new(void)
{
- return hashmap__new(key_hash, key_equal, NULL);
+ struct hashmap *hash;
+
+ hash = hashmap__new(key_hash, key_equal, NULL);
+ if (IS_ERR(hash))
+ return NULL;
+ return hash;
}
void ids__free(struct hashmap *ids)
@@ -299,6 +305,10 @@ struct expr_parse_ctx *expr__ctx_new(void)
return NULL;
ctx->ids = hashmap__new(key_hash, key_equal, NULL);
+ if (IS_ERR(ctx->ids)) {
+ free(ctx);
+ return NULL;
+ }
ctx->runtime = 0;
return ctx;
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 79cce216727e..e3c1a532d059 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2321,6 +2321,7 @@ out:
#define FEAT_PROCESS_STR_FUN(__feat, __feat_env) \
static int process_##__feat(struct feat_fd *ff, void *data __maybe_unused) \
{\
+ free(ff->ph->env.__feat_env); \
ff->ph->env.__feat_env = do_read_string(ff); \
return ff->ph->env.__feat_env ? 0 : -ENOMEM; \
}
@@ -4124,6 +4125,7 @@ int perf_event__process_feature(struct perf_session *session,
struct perf_record_header_feature *fe = (struct perf_record_header_feature *)event;
int type = fe->header.type;
u64 feat = fe->feat_id;
+ int ret = 0;
if (type < 0 || type >= PERF_RECORD_HEADER_MAX) {
pr_warning("invalid record type %d in pipe-mode\n", type);
@@ -4141,11 +4143,13 @@ int perf_event__process_feature(struct perf_session *session,
ff.size = event->header.size - sizeof(*fe);
ff.ph = &session->header;
- if (feat_ops[feat].process(&ff, NULL))
- return -1;
+ if (feat_ops[feat].process(&ff, NULL)) {
+ ret = -1;
+ goto out;
+ }
if (!feat_ops[feat].print || !tool->show_feat_hdr)
- return 0;
+ goto out;
if (!feat_ops[feat].full_only ||
tool->show_feat_hdr >= SHOW_FEAT_HEADER_FULL_INFO) {
@@ -4154,8 +4158,9 @@ int perf_event__process_feature(struct perf_session *session,
fprintf(stdout, "# %s info available, use -I to display\n",
feat_ops[feat].name);
}
-
- return 0;
+out:
+ free_event_desc(ff.events);
+ return ret;
}
size_t perf_event__fprintf_event_update(union perf_event *event, FILE *fp)
diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
index 5f83937bf8f3..0e013c2d9eb4 100644
--- a/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-decoder.c
@@ -1205,61 +1205,69 @@ out_no_progress:
static bool intel_pt_fup_event(struct intel_pt_decoder *decoder)
{
+ enum intel_pt_sample_type type = decoder->state.type;
bool ret = false;
+ decoder->state.type &= ~INTEL_PT_BRANCH;
+
if (decoder->set_fup_tx_flags) {
decoder->set_fup_tx_flags = false;
decoder->tx_flags = decoder->fup_tx_flags;
- decoder->state.type = INTEL_PT_TRANSACTION;
+ decoder->state.type |= INTEL_PT_TRANSACTION;
if (decoder->fup_tx_flags & INTEL_PT_ABORT_TX)
decoder->state.type |= INTEL_PT_BRANCH;
- decoder->state.from_ip = decoder->ip;
- decoder->state.to_ip = 0;
decoder->state.flags = decoder->fup_tx_flags;
- return true;
+ ret = true;
}
if (decoder->set_fup_ptw) {
decoder->set_fup_ptw = false;
- decoder->state.type = INTEL_PT_PTW;
+ decoder->state.type |= INTEL_PT_PTW;
decoder->state.flags |= INTEL_PT_FUP_IP;
- decoder->state.from_ip = decoder->ip;
- decoder->state.to_ip = 0;
decoder->state.ptw_payload = decoder->fup_ptw_payload;
- return true;
+ ret = true;
}
if (decoder->set_fup_mwait) {
decoder->set_fup_mwait = false;
- decoder->state.type = INTEL_PT_MWAIT_OP;
- decoder->state.from_ip = decoder->ip;
- decoder->state.to_ip = 0;
+ decoder->state.type |= INTEL_PT_MWAIT_OP;
decoder->state.mwait_payload = decoder->fup_mwait_payload;
ret = true;
}
if (decoder->set_fup_pwre) {
decoder->set_fup_pwre = false;
decoder->state.type |= INTEL_PT_PWR_ENTRY;
- decoder->state.type &= ~INTEL_PT_BRANCH;
- decoder->state.from_ip = decoder->ip;
- decoder->state.to_ip = 0;
decoder->state.pwre_payload = decoder->fup_pwre_payload;
ret = true;
}
if (decoder->set_fup_exstop) {
decoder->set_fup_exstop = false;
decoder->state.type |= INTEL_PT_EX_STOP;
- decoder->state.type &= ~INTEL_PT_BRANCH;
decoder->state.flags |= INTEL_PT_FUP_IP;
- decoder->state.from_ip = decoder->ip;
- decoder->state.to_ip = 0;
ret = true;
}
if (decoder->set_fup_bep) {
decoder->set_fup_bep = false;
decoder->state.type |= INTEL_PT_BLK_ITEMS;
- decoder->state.type &= ~INTEL_PT_BRANCH;
+ ret = true;
+ }
+ if (decoder->overflow) {
+ decoder->overflow = false;
+ if (!ret && !decoder->pge) {
+ if (decoder->hop) {
+ decoder->state.type = 0;
+ decoder->pkt_state = INTEL_PT_STATE_RESAMPLE;
+ }
+ decoder->pge = true;
+ decoder->state.type |= INTEL_PT_BRANCH | INTEL_PT_TRACE_BEGIN;
+ decoder->state.from_ip = 0;
+ decoder->state.to_ip = decoder->ip;
+ return true;
+ }
+ }
+ if (ret) {
decoder->state.from_ip = decoder->ip;
decoder->state.to_ip = 0;
- ret = true;
+ } else {
+ decoder->state.type = type;
}
return ret;
}
@@ -1608,7 +1616,16 @@ static int intel_pt_overflow(struct intel_pt_decoder *decoder)
intel_pt_clear_tx_flags(decoder);
intel_pt_set_nr(decoder);
decoder->timestamp_insn_cnt = 0;
- decoder->pkt_state = INTEL_PT_STATE_ERR_RESYNC;
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
+ decoder->state.from_ip = decoder->ip;
+ decoder->ip = 0;
+ decoder->pge = false;
+ decoder->set_fup_tx_flags = false;
+ decoder->set_fup_ptw = false;
+ decoder->set_fup_mwait = false;
+ decoder->set_fup_pwre = false;
+ decoder->set_fup_exstop = false;
+ decoder->set_fup_bep = false;
decoder->overflow = true;
return -EOVERFLOW;
}
@@ -2666,6 +2683,8 @@ static int intel_pt_scan_for_psb(struct intel_pt_decoder *decoder);
/* Hop mode: Ignore TNT, do not walk code, but get ip from FUPs and TIPs */
static int intel_pt_hop_trace(struct intel_pt_decoder *decoder, bool *no_tip, int *err)
{
+ *err = 0;
+
/* Leap from PSB to PSB, getting ip from FUP within PSB+ */
if (decoder->leap && !decoder->in_psb && decoder->packet.type != INTEL_PT_PSB) {
*err = intel_pt_scan_for_psb(decoder);
@@ -2678,6 +2697,7 @@ static int intel_pt_hop_trace(struct intel_pt_decoder *decoder, bool *no_tip, in
return HOP_IGNORE;
case INTEL_PT_TIP_PGD:
+ decoder->pge = false;
if (!decoder->packet.count) {
intel_pt_set_nr(decoder);
return HOP_IGNORE;
@@ -2705,18 +2725,21 @@ static int intel_pt_hop_trace(struct intel_pt_decoder *decoder, bool *no_tip, in
if (!decoder->packet.count)
return HOP_IGNORE;
intel_pt_set_ip(decoder);
- if (intel_pt_fup_event(decoder))
- return HOP_RETURN;
- if (!decoder->branch_enable)
+ if (decoder->set_fup_mwait || decoder->set_fup_pwre)
+ *no_tip = true;
+ if (!decoder->branch_enable || !decoder->pge)
*no_tip = true;
if (*no_tip) {
decoder->state.type = INTEL_PT_INSTRUCTION;
decoder->state.from_ip = decoder->ip;
decoder->state.to_ip = 0;
+ intel_pt_fup_event(decoder);
return HOP_RETURN;
}
+ intel_pt_fup_event(decoder);
+ decoder->state.type |= INTEL_PT_INSTRUCTION | INTEL_PT_BRANCH;
*err = intel_pt_walk_fup_tip(decoder);
- if (!*err)
+ if (!*err && decoder->state.to_ip)
decoder->pkt_state = INTEL_PT_STATE_RESAMPLE;
return HOP_RETURN;
@@ -2897,7 +2920,7 @@ static bool intel_pt_psb_with_fup(struct intel_pt_decoder *decoder, int *err)
{
struct intel_pt_psb_info data = { .fup = false };
- if (!decoder->branch_enable || !decoder->pge)
+ if (!decoder->branch_enable)
return false;
intel_pt_pkt_lookahead(decoder, intel_pt_psb_lookahead_cb, &data);
@@ -2924,6 +2947,7 @@ static int intel_pt_walk_trace(struct intel_pt_decoder *decoder)
if (err)
return err;
next:
+ err = 0;
if (decoder->cyc_threshold) {
if (decoder->sample_cyc && last_packet_type != INTEL_PT_CYC)
decoder->sample_cyc = false;
@@ -2962,6 +2986,7 @@ next:
case INTEL_PT_TIP_PGE: {
decoder->pge = true;
+ decoder->overflow = false;
intel_pt_mtc_cyc_cnt_pge(decoder);
intel_pt_set_nr(decoder);
if (decoder->packet.count == 0) {
@@ -2999,7 +3024,7 @@ next:
break;
}
intel_pt_set_last_ip(decoder);
- if (!decoder->branch_enable) {
+ if (!decoder->branch_enable || !decoder->pge) {
decoder->ip = decoder->last_ip;
if (intel_pt_fup_event(decoder))
return 0;
@@ -3467,10 +3492,10 @@ static int intel_pt_sync_ip(struct intel_pt_decoder *decoder)
decoder->set_fup_pwre = false;
decoder->set_fup_exstop = false;
decoder->set_fup_bep = false;
+ decoder->overflow = false;
if (!decoder->branch_enable) {
decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
- decoder->overflow = false;
decoder->state.type = 0; /* Do not have a sample */
return 0;
}
@@ -3485,7 +3510,6 @@ static int intel_pt_sync_ip(struct intel_pt_decoder *decoder)
decoder->pkt_state = INTEL_PT_STATE_RESAMPLE;
else
decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
- decoder->overflow = false;
decoder->state.from_ip = 0;
decoder->state.to_ip = decoder->ip;
@@ -3607,7 +3631,7 @@ static int intel_pt_sync(struct intel_pt_decoder *decoder)
}
decoder->have_last_ip = true;
- decoder->pkt_state = INTEL_PT_STATE_NO_IP;
+ decoder->pkt_state = INTEL_PT_STATE_IN_SYNC;
err = intel_pt_walk_psb(decoder);
if (err)
@@ -3704,7 +3728,8 @@ const struct intel_pt_state *intel_pt_decode(struct intel_pt_decoder *decoder)
if (err) {
decoder->state.err = intel_pt_ext_err(err);
- decoder->state.from_ip = decoder->ip;
+ if (err != -EOVERFLOW)
+ decoder->state.from_ip = decoder->ip;
intel_pt_update_sample_time(decoder);
decoder->sample_tot_cyc_cnt = decoder->tot_cyc_cnt;
intel_pt_set_nr(decoder);
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index 556a893508da..e8613cbda331 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -2565,6 +2565,7 @@ static int intel_pt_run_decoder(struct intel_pt_queue *ptq, u64 *timestamp)
ptq->sync_switch = false;
intel_pt_next_tid(pt, ptq);
}
+ ptq->timestamp = state->est_timestamp;
if (pt->synth_opts.errors) {
err = intel_ptq_synth_error(ptq, state);
if (err)
@@ -3624,6 +3625,7 @@ static int intel_pt_parse_vm_tm_corr_arg(struct intel_pt *pt, char **args)
*args = p;
return 0;
}
+ p += 1;
while (1) {
vmcs = strtoull(p, &p, 0);
if (errno)
diff --git a/tools/perf/util/perf_regs.c b/tools/perf/util/perf_regs.c
index 5ee47ae1509c..06a7461ba864 100644
--- a/tools/perf/util/perf_regs.c
+++ b/tools/perf/util/perf_regs.c
@@ -25,6 +25,9 @@ int perf_reg_value(u64 *valp, struct regs_dump *regs, int id)
int i, idx = 0;
u64 mask = regs->mask;
+ if ((u64)id >= PERF_SAMPLE_REGS_CACHE_SIZE)
+ return -EINVAL;
+
if (regs->cache_mask & (1ULL << id))
goto out;
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 6ae58406f4fc..8dfbba15aeb8 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1659,6 +1659,21 @@ bool is_pmu_core(const char *name)
return !strcmp(name, "cpu") || is_arm_pmu_core(name);
}
+static bool pmu_alias_is_duplicate(struct sevent *alias_a,
+ struct sevent *alias_b)
+{
+ /* Different names -> never duplicates */
+ if (strcmp(alias_a->name, alias_b->name))
+ return false;
+
+ /* Don't remove duplicates for hybrid PMUs */
+ if (perf_pmu__is_hybrid(alias_a->pmu) &&
+ perf_pmu__is_hybrid(alias_b->pmu))
+ return false;
+
+ return true;
+}
+
void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
bool long_desc, bool details_flag, bool deprecated,
const char *pmu_name)
@@ -1744,12 +1759,8 @@ void print_pmu_events(const char *event_glob, bool name_only, bool quiet_flag,
qsort(aliases, len, sizeof(struct sevent), cmp_sevent);
for (j = 0; j < len; j++) {
/* Skip duplicates */
- if (j > 0 && !strcmp(aliases[j].name, aliases[j - 1].name)) {
- if (!aliases[j].pmu || !aliases[j - 1].pmu ||
- !strcmp(aliases[j].pmu, aliases[j - 1].pmu)) {
- continue;
- }
- }
+ if (j > 0 && pmu_alias_is_duplicate(&aliases[j], &aliases[j - 1]))
+ continue;
if (name_only) {
printf("%s ", aliases[j].name);
diff --git a/tools/perf/util/python.c b/tools/perf/util/python.c
index 563a9ba8954f..7f782a31bda3 100644
--- a/tools/perf/util/python.c
+++ b/tools/perf/util/python.c
@@ -461,7 +461,7 @@ get_tracepoint_field(struct pyrf_event *pevent, PyObject *attr_name)
struct tep_event *tp_format;
tp_format = trace_event__tp_format_id(evsel->core.attr.config);
- if (!tp_format)
+ if (IS_ERR_OR_NULL(tp_format))
return NULL;
evsel->tp_format = tp_format;
diff --git a/tools/perf/util/smt.c b/tools/perf/util/smt.c
index 20bacd5972ad..34f1b1b1176c 100644
--- a/tools/perf/util/smt.c
+++ b/tools/perf/util/smt.c
@@ -15,7 +15,7 @@ int smt_on(void)
if (cached)
return cached_result;
- if (sysfs__read_int("devices/system/cpu/smt/active", &cached_result) > 0)
+ if (sysfs__read_int("devices/system/cpu/smt/active", &cached_result) >= 0)
goto done;
ncpu = sysconf(_SC_NPROCESSORS_CONF);
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-25 09:44:10 +0100