top: document a debugging script

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/procps/top.c b/procps/top.c
index 1eb33dc5d3d3d39a1224ce2472f23d5993c2906a..d7cc9af1b042d40b0b2a92c65a06339d46ab11fc 100644 (file)
--- a/procps/top.c
+++ b/procps/top.c
@@ -30,6 +30,15 @@
  *
  * Licensed under GPLv2, see file LICENSE in this source tree.
  */
+/* Howto snapshot /proc for debugging top problems:
+ * for f in /proc/[0-9]*""/stat; do
+ *         n=${f#/proc/}
+ *         n=${n%/stat}_stat
+ *         cp $f $n
+ * done
+ * cp /proc/stat /proc/meminfo .
+ * top -bn1 >top.out
+ */
 
 #include "libbb.h"
 
@@ -546,7 +555,7 @@ static NOINLINE void display_process_list(int lines_rem, int scr_width)
                pmem_scale /= 4;
                pmem_shift -= 2;
        }
-       pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS? 20 : 2);
+       pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
        busy_jifs = cur_jif.busy - prev_jif.busy;
        /* This happens if there were lots of short-lived processes
@@ -577,7 +586,7 @@ static NOINLINE void display_process_list(int lines_rem, int scr_width)
                pcpu_scale /= 4;
                pcpu_shift -= 2;
        }
-       pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS? 20 : 2);
+       pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
        /* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
 #endif