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Message-ID: <20250401182347.3422199-29-irogers@google.com>
Date: Tue, 1 Apr 2025 11:23:26 -0700
From: Ian Rogers <irogers@...gle.com>
To: Yury Norov <yury.norov@...il.com>, Rasmus Villemoes <linux@...musvillemoes.dk>,
Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>, Thomas Gleixner <tglx@...utronix.de>,
Darren Hart <dvhart@...radead.org>, Davidlohr Bueso <dave@...olabs.net>,
"André Almeida" <andrealmeid@...lia.com>, John Garry <john.g.garry@...cle.com>,
Will Deacon <will@...nel.org>, James Clark <james.clark@...aro.org>,
Mike Leach <mike.leach@...aro.org>, Leo Yan <leo.yan@...ux.dev>,
Yicong Yang <yangyicong@...ilicon.com>, Jonathan Cameron <jonathan.cameron@...wei.com>,
Nathan Chancellor <nathan@...nel.org>, Bill Wendling <morbo@...gle.com>,
Justin Stitt <justinstitt@...gle.com>, Josh Poimboeuf <jpoimboe@...nel.org>,
Al Viro <viro@...iv.linux.org.uk>, Kyle Meyer <kyle.meyer@....com>,
Ben Gainey <ben.gainey@....com>, Athira Rajeev <atrajeev@...ux.vnet.ibm.com>,
Kajol Jain <kjain@...ux.ibm.com>, Aditya Gupta <adityag@...ux.ibm.com>,
Eder Zulian <ezulian@...hat.com>, Dapeng Mi <dapeng1.mi@...ux.intel.com>,
Kuan-Wei Chiu <visitorckw@...il.com>, He Zhe <zhe.he@...driver.com>,
Dirk Gouders <dirk@...ders.net>, Brian Geffon <bgeffon@...gle.com>,
Ravi Bangoria <ravi.bangoria@....com>, Howard Chu <howardchu95@...il.com>,
Charlie Jenkins <charlie@...osinc.com>, Colin Ian King <colin.i.king@...il.com>,
Dominique Martinet <asmadeus@...ewreck.org>, Jann Horn <jannh@...gle.com>,
Masahiro Yamada <masahiroy@...nel.org>, Arnd Bergmann <arnd@...db.de>,
Yang Jihong <yangjihong@...edance.com>, Dmitry Vyukov <dvyukov@...gle.com>,
Andi Kleen <ak@...ux.intel.com>, Graham Woodward <graham.woodward@....com>,
Ilkka Koskinen <ilkka@...amperecomputing.com>,
Anshuman Khandual <anshuman.khandual@....com>, Zhongqiu Han <quic_zhonhan@...cinc.com>,
Hao Ge <gehao@...inos.cn>, Tengda Wu <wutengda@...weicloud.com>,
Gabriele Monaco <gmonaco@...hat.com>, Chun-Tse Shao <ctshao@...gle.com>,
Casey Chen <cachen@...estorage.com>, "Dr. David Alan Gilbert" <linux@...blig.org>,
Li Huafei <lihuafei1@...wei.com>, "Steinar H. Gunderson" <sesse@...gle.com>, Levi Yun <yeoreum.yun@....com>,
Weilin Wang <weilin.wang@...el.com>, Thomas Falcon <thomas.falcon@...el.com>,
Thomas Richter <tmricht@...ux.ibm.com>, Andrew Kreimer <algonell@...il.com>,
"Krzysztof Łopatowski" <krzysztof.m.lopatowski@...il.com>,
Christophe Leroy <christophe.leroy@...roup.eu>,
Jean-Philippe Romain <jean-philippe.romain@...s.st.com>, Junhao He <hejunhao3@...wei.com>,
"Masami Hiramatsu (Google)" <mhiramat@...nel.org>, Xu Yang <xu.yang_2@....com>,
Steve Clevenger <scclevenger@...amperecomputing.com>, Zixian Cai <fzczx123@...il.com>,
Stephen Brennan <stephen.s.brennan@...cle.com>, Yujie Liu <yujie.liu@...el.com>,
linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, llvm@...ts.linux.dev
Subject: [PATCH v1 28/48] perf kwork: Silence -Wshorten-64-to-32 warnings
The clang warning -Wshorten-64-to-32 can be useful to catch
inadvertent truncation. In some instances this truncation can lead to
changing the sign of a result, for example, truncation to return an
int to fit a sort routine. Silence the warning by making the implicit
truncation explicit.
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/builtin-kwork.c | 11 +++++------
tools/perf/util/bpf_kwork_top.c | 2 +-
2 files changed, 6 insertions(+), 7 deletions(-)
diff --git a/tools/perf/builtin-kwork.c b/tools/perf/builtin-kwork.c
index c41a68d073de..cc5488cb98e4 100644
--- a/tools/perf/builtin-kwork.c
+++ b/tools/perf/builtin-kwork.c
@@ -1574,8 +1574,7 @@ static void top_print_per_cpu_load(struct perf_kwork *kwork)
load = stat->cpus_runtime[i].load;
if (test_bit(i, stat->all_cpus_bitmap) && total) {
load_ratio = load * 10000 / total;
- load_width = PRINT_CPU_USAGE_HIST_WIDTH *
- load_ratio / 10000;
+ load_width = (int)(PRINT_CPU_USAGE_HIST_WIDTH * load_ratio / 10000);
printf("%%Cpu%-*d[%.*s%.*s %*.*f%%]\n",
PRINT_CPU_WIDTH, i,
@@ -1595,7 +1594,7 @@ static void top_print_cpu_usage(struct perf_kwork *kwork)
u64 idle_time = stat->cpus_runtime[MAX_NR_CPUS].idle;
u64 hardirq_time = stat->cpus_runtime[MAX_NR_CPUS].irq;
u64 softirq_time = stat->cpus_runtime[MAX_NR_CPUS].softirq;
- int cpus_nr = bitmap_weight(stat->all_cpus_bitmap, MAX_NR_CPUS);
+ int cpus_nr = (int)bitmap_weight(stat->all_cpus_bitmap, MAX_NR_CPUS);
u64 cpus_total_time = stat->cpus_runtime[MAX_NR_CPUS].total;
printf("Total : %*.*f ms, %d cpus\n",
@@ -1801,7 +1800,7 @@ static int perf_kwork__read_events(struct perf_kwork *kwork)
session = perf_session__new(&data, &kwork->tool);
if (IS_ERR(session)) {
pr_debug("Error creating perf session\n");
- return PTR_ERR(session);
+ return (int)PTR_ERR(session);
}
symbol__init(&session->header.env);
@@ -2088,8 +2087,8 @@ static void top_calc_cpu_usage(struct perf_kwork *kwork)
top_subtract_irq_runtime(kwork, work);
- work->cpu_usage = work->total_runtime * 10000 /
- stat->cpus_runtime[work->cpu].total;
+ work->cpu_usage = (u32)(work->total_runtime *
+ 10000 / stat->cpus_runtime[work->cpu].total);
top_calc_idle_time(kwork, work);
next:
diff --git a/tools/perf/util/bpf_kwork_top.c b/tools/perf/util/bpf_kwork_top.c
index b6f187dd9136..808d0c84d26d 100644
--- a/tools/perf/util/bpf_kwork_top.c
+++ b/tools/perf/util/bpf_kwork_top.c
@@ -219,7 +219,7 @@ static void read_task_info(struct kwork_work *work)
int fd;
struct task_data data;
struct task_key key = {
- .pid = work->id,
+ .pid = (__u32)work->id,
.cpu = work->cpu,
};
--
2.49.0.504.g3bcea36a83-goog
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