linux-kernel - Re: [PATCH v8 4/6] perf tools: Add print support for namespace events

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Date:   Tue, 14 Mar 2017 11:29:49 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Hari Bathini <hbathini@...ux.vnet.ibm.com>
Cc:     ast@...com, peterz@...radead.org,
        lkml <linux-kernel@...r.kernel.org>,
        alexander.shishkin@...ux.intel.com, mingo@...hat.com,
        daniel@...earbox.net, rostedt@...dmis.org,
        Ananth N Mavinakayanahalli <ananth@...ux.vnet.ibm.com>,
        ebiederm@...ssion.com, sargun@...gun.me,
        Aravinda Prasad <aravinda@...ux.vnet.ibm.com>,
        brendan.d.gregg@...il.com, jolsa@...hat.com
Subject: Re: [PATCH v8 4/6] perf tools: Add print support for namespace events

Em Wed, Mar 08, 2017 at 02:11:59AM +0530, Hari Bathini escreveu:
> +size_t perf_event__fprintf_namespaces(union perf_event *event, FILE *fp)
> +{
> +	size_t ret = 0;
> +	struct perf_ns_link_info *ns_link_info;
> +	u32 nr_namespaces, idx;
> +
> +	ns_link_info = event->namespaces.link_info;
> +	nr_namespaces = event->namespaces.nr_namespaces;
> +
> +	ret += fprintf(fp, " %d/%d - nr_namespaces: %u\n\t\t[",
> +		       event->namespaces.pid,
> +		       event->namespaces.tid,
> +		       nr_namespaces);
> +
> +	for (idx = 0; idx < nr_namespaces; idx++) {
> +		if (idx && (idx % 4 == 0))
> +			ret += fprintf(fp, "\n\t\t ");
> +
> +		ret  += fprintf(fp, "%u/%s: %lu/0x%lx%s", idx,
> +				perf_ns__name(idx), (u64)ns_link_info[idx].dev,
> +				(u64)ns_link_info[idx].ino,
> +				((idx + 1) != nr_namespaces) ? ", " : "]\n");

Fails in some environments, such as debian:experimental-x-mipsel:

  CC       /tmp/build/perf/util/evlist.o
util/event.c: In function 'perf_event__fprintf_namespaces':
util/event.c:1129:33: error: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'long long unsigned int' [-Werror=format=]
   ret  += fprintf(fp, "%u/%s: %lu/0x%lx%s", idx,
                                 ^
util/event.c:1129:39: error: format '%lx' expects argument of type 'long unsigned int', but argument 6 has type 'long long unsigned int' [-Werror=format=]
   ret  += fprintf(fp, "%u/%s: %lu/0x%lx%s", idx,
                                       ^
  CC       /tmp/build/perf/builtin-list.o

-------------------

Fixing this up to use PRIu64...

- Arnaldo