perf bench numa: Address compiler error on s390

The compilation on s390 results in this error:

  # make DEBUG=y bench/numa.o
  bench/numa.c: In function ‘__bench_numa’:
  bench/numa.c:1749:81: error: ‘%d’ directive output may be truncated
              writing between 1 and 11 bytes into a region of size between
              10 and 20 [-Werror=format-truncation=]
  1749 |        snprintf(tname, sizeof(tname), "process%d:thread%d", p, t);
  bench/numa.c:1749:64: note: directive argument in the range
                 [-2147483647, 2147483646]

The maximum length of the %d replacement is 11 characters because of the
negative sign.  Therefore extend the array by two more characters.

Output after:

  # make  DEBUG=y bench/numa.o > /dev/null 2>&1; ll bench/numa.o
  -rw-r--r-- 1 root root 418320 May 19 09:11 bench/numa.o

Fixes: 3aff8ba0a4c9c919 ("perf bench numa: Avoid possible truncation when using snprintf()")
Suggested-by: Namhyung Kim <>
Signed-off-by: Thomas Richter <>
Cc: Heiko Carstens <>
Cc: Sumanth Korikkar <>
Cc: Sven Schnelle <>
Cc: Vasily Gorbik <>
Signed-off-by: Arnaldo Carvalho de Melo <>
1 file changed