1.SH "SUNOS 5 NOTES" 2CPU percentage is calculated as a fraction of total available computing 3resources. Hence on a multiprocessor machine a single threaded process 4can never consume cpu time in excess of 1 divided by the number of processors. 5For example, on a 4 processor machine, a single threaded process will 6never show a cpu percentage higher than 25%. The CPU percentage column 7will always total approximately 100, regardless of the number of processors. 8 9The kernel summary line shows the following information, all displayed 10as a per-second rate: 11.TP 9 12.B ctxsw 13Context switches. 14.TP 9 15.B trap 16Number of traps. 17.TP 9 18.B intr 19Number of interrupts. 20.TP 9 21.B syscall 22Number of system calls. 23.TP 9 24.B fork 25Number of forks and vforks. 26.TP 9 27.B flt 28Number of page faults. 29.TP 9 30.B pgin 31Number of kilobytes paged in to physical memory. 32.TP 9 33.B pgout 34Number of kilobytes paged out from physical memory. 35.PP 36The memory summary line displays the following: 37.TP 14 38.B "phys mem" 39Total amount of physical memory that can be allocated for use by processes 40(it does not include memory reserved for the kernel's use). 41.TP 14 42.B "free mem" 43The amount of unallocated physical memory. 44.TP 14 45.B "total swap" 46The total amount of swap area allocated on disk. 47.TP 14 48.B "free swap" 49The amount of swap area on disk that is still available. 50.PP 51Unlike previous versions of 52.IR top , 53the swap figures will differ from the summary output of 54.IR swap (1M) 55since the latter includes physical memory as well. 56.PP 57The column 58.B NLWP 59indicates the number of lightweight processes in a process. 60This usually corresponds to the number of threads in that process. 61.PP 62The display of individual threads can be toggled with the 63synonymous commands 64.B t 65and 66.BR H. 67Information about state, priority, CPU time and percent CPU are 68shown for each individual thread. Other information is identical 69for all threads in the same process. In this display the column 70.B LWP 71replaces 72.B NLWP 73and shows the lightweight process id. The 74column names 75.B LWP 76and 77.B NLWP 78are consistent with 79.IR ps (1). 80.PP 81In BSD Unix, process priority was represented internally as a signed 82offset from a zero value with an unsigned value. The "zero" value 83was usually something like 20, allowing for a range of priorities 84from -20 to 20. As implemented on SunOS 5, older versions of top 85continued to interpret process priority in this manner, even though 86it was no longer correct. Starting with top version 3.5, this was 87changed to agree with the rest of the system. 88.PP 89Long options are not currently available in Solaris. 90.PP 91The SunOS 5 (Solaris 2) port was originally written by Torsten Kasch, 92<torsten@techfak.uni-bielefeld.de>. Many contributions have been 93provided by Casper Dik <Casper.Dik@sun.com>. 94Support for multi-cpu, calculation of CPU% and memory stats provided by 95Robert Boucher <boucher@sofkin.ca>, Marc Cohen <marc@aai.com>, 96Charles Hedrick <hedrick@geneva.rutgers.edu>, and 97William L. Jones <jones@chpc>. 98