Package: htop Version: 0.8.3-1 Severity: normal Tags: patch
htop shows negative cpu usage time: PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command 9785 user 20 0 325M 236M 1860 S 0.0 1.5 0:00.12 ./mprime 9792 user 39 19 325M 236M 1860 R 0.0 1.5 -596523h-14:-8 ./mprime 9796 user 39 19 325M 236M 1860 R 0.0 1.5 -596523h-14:-8 ./mprime 9797 user 39 19 325M 236M 1860 R 0.0 1.5 -596523h-14:-8 ./mprime 9798 user 39 19 325M 236M 1860 R 0.0 1.5 -596523h-14:-8 ./mprime 9781 user 30 10 325M 236M 1860 S 0.0 1.5 -596523h-14:-8 ./mprime This is caused by an integer overflow. The high number is comming from the Kernel: (e.g.) user@kvm:~$ cat /proc/9781/task/9798/stat 9798 (mprime) R 4413 9781 4413 34824 9781 4202560 46384 0 4 0 13739580949 918902298809 0 0 39 19 6 0 46913565 341078016 60514 18446744073709551615 4194304 29585884 140735277536320 139701526982104 17369198 0 0 0 16386 0 0 0 -1 3 0 0 9183 0 0 918902298809 + 13739580949 is quite a large number (>2^31-1) Int should actually be enough at that place. >From 1f5d6f44731482f76262ee71179a1ded3a0bf737 Mon Sep 17 00:00:00 2001 From: Micha M. <mt...@web.de> Date: Fri, 27 Jan 2012 22:00:43 +0100 Subject: [PATCH] Fix integer overflow Without this fix I get something like: PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command 9785 user 20 0 325M 236M 1860 S 0.0 1.5 0:00.12 ./mprime 9792 user 39 19 325M 236M 1860 R 0.0 1.5 -596523h-14:-8 ./mprime 9796 user 39 19 325M 236M 1860 R 0.0 1.5 -596523h-14:-8 ./mprime 9797 user 39 19 325M 236M 1860 R 0.0 1.5 -596523h-14:-8 ./mprime 9798 user 39 19 325M 236M 1860 R 0.0 1.5 -596523h-14:-8 ./mprime 9781 user 30 10 325M 236M 1860 S 0.0 1.5 -596523h-14:-8 ./mprime After: PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command 9781 user 30 10 325M 236M 1860 S 0.0 1.5 0:00.01 ./mprime 9785 user 20 0 325M 236M 1860 S 0.0 1.5 0:00.12 ./mprime 9792 user 39 19 325M 236M 1860 R 0.0 1.5 2590671h22:11 ./mprime 9796 user 39 19 325M 236M 1860 R 0.0 1.5 2581130h26:17 ./mprime 9797 user 39 19 325M 236M 1860 R 0.0 1.5 2562047h47:16 ./mprime 9798 user 39 19 325M 236M 1860 R 0.0 1.5 2590671h53:17 ./mprime It looks like that there is a bug in the Linux Kernel: user@kvm:~$ cat /proc/9781/task/9798/stat 9798 (mprime) R 4413 9781 4413 34824 9781 4202560 46384 0 4 0 13739580949 918902298809 0 0 39 19 6 0 46913565 341078016 60514 18446744073709551615 4194304 29585884 140735277536320 139701526982104 17369198 0 0 0 16386 0 0 0 -1 3 0 0 9183 0 0 user@kvm:~$ uname -a Linux kvm 2.6.32-5-amd64 #1 SMP Thu Nov 3 03:41:26 UTC 2011 x86_64 GNU/Linux user@kvm:~$ Signed-off-by: Micha M. <mt...@web.de> --- Process.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/Process.c b/Process.c index 8f3762c..0cc990f 100644 --- a/Process.c +++ b/Process.c @@ -236,7 +236,7 @@ static void Process_printTime(RichString* str, unsigned long t) { double jiffytime = 1.0 / jiffy; double realTime = t * jiffytime; - int iRealTime = (int) realTime; + long long iRealTime = (long long) realTime; int hours = iRealTime / 3600; int minutes = (iRealTime / 60) % 60; -- 1.7.0.4 -- System Information: Debian Release: 6.0.3 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 2.6.32-5-amd64 (SMP w/8 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages htop depends on: ii libc6 2.11.2-10 Embedded GNU C Library: Shared lib ii libncurses5 5.7+20100313-5 shared libraries for terminal hand htop recommends no packages. Versions of packages htop suggests: pn ltrace <none> (no description available) pn strace <none> (no description available) -- no debconf information -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org