perf script: Increase PID/TID width for output

On large systems, it's common that PID/TID is bigger than 5-digit and it
makes the output unaligned.  Let's increase the width to 7.

Before:

  $ perf script
  ...
           swapper     0 [006] 1540823.803935:    1369324 cycles:P:  ffffffff9c755588 ktime_get+0x18 ([kernel.kallsyms])
       gvfsd-dnssd 95114 [004] 1540823.804164:    1643871 cycles:P:  ffffffff9cfdca5c __get_user_8+0x1c ([kernel.kallsyms])
         perf-exec 1558582 [000] 1540823.804209:    1018714 cycles:P:  ffffffff9c924ab9 __slab_free+0x9 ([kernel.kallsyms])
             nmcli 1558589 [007] 1540823.804384:    1859212 cycles:P:      7f70537a8ad8 __strchrnul_evex+0x18 (/usr/lib/x86_64-linux-gnu/libc.so.6>
             sleep 1558582 [000] 1540823.804456:     987425 cycles:P:      7fd35bb27b30 _dl_init+0x0 (/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2>
       dbus-daemon  3043 [003] 1540823.804575:    1564465 cycles:P:  ffffffff9cb2bb70 llist_add_batch+0x0 ([kernel.kallsyms])
             gdbus 1558592 [001] 1540823.804766:    1315219 cycles:P:  ffffffff9c797b2e audit_filter_syscall+0x9e ([kernel.kallsyms])
    NetworkManager  3452 [005] 1540823.805301:    1558782 cycles:P:      7fa957737748 g_bit_lock+0x58 (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7400.5>

After:

  $ perf script
  ...
           swapper       0 [006] 1540823.803935:    1369324 cycles:P:  ffffffff9c755588 ktime_get+0x18 ([kernel.kallsyms])
       gvfsd-dnssd   95114 [004] 1540823.804164:    1643871 cycles:P:  ffffffff9cfdca5c __get_user_8+0x1c ([kernel.kallsyms])
         perf-exec 1558582 [000] 1540823.804209:    1018714 cycles:P:  ffffffff9c924ab9 __slab_free+0x9 ([kernel.kallsyms])
             nmcli 1558589 [007] 1540823.804384:    1859212 cycles:P:      7f70537a8ad8 __strchrnul_evex+0x18 (/usr/lib/x86_64-linux-gnu/libc.so.6>
             sleep 1558582 [000] 1540823.804456:     987425 cycles:P:      7fd35bb27b30 _dl_init+0x0 (/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2>
       dbus-daemon    3043 [003] 1540823.804575:    1564465 cycles:P:  ffffffff9cb2bb70 llist_add_batch+0x0 ([kernel.kallsyms])
             gdbus 1558592 [001] 1540823.804766:    1315219 cycles:P:  ffffffff9c797b2e audit_filter_syscall+0x9e ([kernel.kallsyms])
    NetworkManager    3452 [005] 1540823.805301:    1558782 cycles:P:      7fa957737748 g_bit_lock+0x58 (/usr/lib/x86_64-linux-gnu/libglib-2.0.so.0.7400.5>

Reviewer notes:

Adrian added:

"Might be worth noting that currently the biggest PID_MAX_LIMIT is 2^22
 so pids don't get bigger than 7 digits presently"

$ echo $((2 ** 22))
4194304
$ echo -n $((2 ** 22)) | wc -c
7
$

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20230531203236.1602054-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-script.c

@@ -801,11 +801,11 @@ static int perf_sample__fprintf_start(struct perf_script *script,
 	}
 
 	if (PRINT_FIELD(PID) && PRINT_FIELD(TID))
-		printed += fprintf(fp, "%5d/%-5d ", sample->pid, sample->tid);
+		printed += fprintf(fp, "%7d/%-7d ", sample->pid, sample->tid);
 	else if (PRINT_FIELD(PID))
-		printed += fprintf(fp, "%5d ", sample->pid);
+		printed += fprintf(fp, "%7d ", sample->pid);
 	else if (PRINT_FIELD(TID))
-		printed += fprintf(fp, "%5d ", sample->tid);
+		printed += fprintf(fp, "%7d ", sample->tid);
 
 	if (PRINT_FIELD(CPU)) {
 		if (latency_format)