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authorDenys Vlasenko <vda.linux@googlemail.com>2011-01-25 00:57:31 (GMT)
committer Denys Vlasenko <vda.linux@googlemail.com>2011-01-25 00:57:31 (GMT)
commit444ff284c4097081108e0eded4711247aacda740 (patch)
treec55401fc09172ff24a53718c45dc34033ac0b4bc
parent975c7141831aa6bf8d9abcafd1e5a9e108a910fc (diff)
downloadbusybox-444ff284c4097081108e0eded4711247aacda740.tar.gz
busybox-444ff284c4097081108e0eded4711247aacda740.tar.bz2
top: document a debugging script
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
-rw-r--r--procps/top.c13
1 files changed, 11 insertions, 2 deletions
diff --git a/procps/top.c b/procps/top.c
index 1eb33dc..d7cc9af 100644
--- 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