#6028: get_memory_usage() sucks performance wise on Solaris
------------------------+---------------------------------------------------
Reporter: mabshoff | Owner: mabshoff
Type: defect | Status: new
Priority: critical | Milestone: sage-4.3.4
Component: solaris | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
------------------------+---------------------------------------------------
Changes (by drkirkby):
* upstream: => N/A
Comment:
Using a system call would be the correct way to do this, but as a
temporary fix, replacing 'top' with 'prstat' is sensible. That is not
fast, but even on a single-processor 500 MHz machine with a load average
of 2, prstat is taking less than 100 ms to execute (see below).
I've created a ticket #8391 to call 'prstat' instead of 'top', despite the
fact either solution is a hack.
{{{
drkir...@kestrel:~$ /usr/sbin/psrinfo -v
Status of virtual processor 0 as of: 02/27/2010 19:22:41
on-line since 02/27/2010 15:10:42.
The sparcv9 processor operates at 500 MHz,
and has a sparcv9 floating point processor.
drkir...@kestrel:~$ time prstat -n 65000 1 1 > b
real 0m0.085s
user 0m0.027s
sys 0m0.050s
drkir...@kestrel:~$ cat b
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
2023 root 4800K 3424K run 20 0 0:18:51 37% qq10/1
2044 root 6032K 5496K run 0 19 0:13:55 31% pgn-extract/1
2043 root 1872K 1336K run 0 19 0:12:17 28% pgn-extract/1
2025 root 2768K 1976K sleep 59 0 0:00:21 0.5% telnet/1
656 drkirkby 9352K 4128K sleep 59 0 0:00:03 0.2% sshd/1
666 drkirkby 3456K 2464K sleep 49 0 0:00:01 0.2% bash/1
2115 drkirkby 4280K 3568K cpu0 49 0 0:00:00 0.2% prstat/1
255 root 3112K 1592K sleep 100 - 0:00:03 0.0% xntpd/1
564 root 15M 5016K sleep 59 0 0:00:02 0.0% httpd/1
642 root 8616K 2328K sleep 59 0 0:00:00 0.0% sendmail/1
2051 nobody 15M 4568K sleep 59 0 0:00:00 0.0% httpd/1
2050 nobody 15M 4568K sleep 59 0 0:00:00 0.0% httpd/1
2052 nobody 15M 4568K sleep 59 0 0:00:00 0.0% httpd/1
2053 nobody 15M 4568K sleep 59 0 0:00:00 0.0% httpd/1
493 root 17M 10M sleep 59 0 0:00:00 0.0% Xsun/1
485 root 1720K 1152K sleep 2 19 0:00:00 0.0% icc-opponents/1
481 root 1664K 1096K sleep 59 0 0:00:00 0.0% runqq10/1
2055 nobody 15M 4568K sleep 59 0 0:00:00 0.0% httpd/1
461 root 6536K 1368K sleep 59 0 0:00:00 0.0% dtlogin/1
655 root 5552K 2560K sleep 59 0 0:00:00 0.0% sshd/1
644 smmsp 8616K 1928K sleep 59 0 0:00:00 0.0% sendmail/1
398 root 4288K 1712K sleep 59 0 0:00:00 0.0% syslogd/13
387 root 4552K 1440K sleep 59 0 0:00:00 0.0% sshd/1
394 root 15M 4568K sleep 59 0 0:00:05 0.0% fmd/19
376 root 3208K 1712K sleep 59 0 0:00:00 0.0% automountd/3
2054 nobody 15M 4568K sleep 59 0 0:00:00 0.0% httpd/1
424 root 9768K 2320K sleep 59 0 0:00:00 0.0% snmpd/1
291 daemon 3160K 1256K sleep 59 0 0:00:00 0.0% rpcbind/1
155 root 5784K 3472K sleep 59 0 0:00:01 0.0% nscd/30
302 root 5352K 2184K sleep 59 0 0:00:01 0.0% inetd/4
306 root 2928K 1424K sleep 59 0 0:00:00 0.0% ttymon/1
294 daemon 3104K 1544K sleep 59 0 0:00:00 0.0% statd/1
311 root 2872K 1392K sleep 59 0 0:00:00 0.0% ttymon/1
119 daemon 4920K 1280K sleep 59 0 0:00:00 0.0% kcfd/3
141 root 3600K 1872K sleep 59 0 0:00:00 0.0% picld/4
114 root 6344K 2272K sleep 59 0 0:00:00 0.0% syseventd/15
305 daemon 2744K 1216K sleep 60 -20 0:00:00 0.0% lockd/2
239 root 2592K 856K sleep 59 0 0:00:00 0.0% iscsid/2
375 root 2920K 1080K sleep 59 0 0:00:00 0.0% automountd/2
277 root 3272K 1248K sleep 59 0 0:00:00 0.0% cron/1
310 root 1672K 1032K sleep 59 0 0:00:00 0.0% utmpd/1
9 root 11M 9184K sleep 59 0 0:00:34 0.0% svc.configd/17
7 root 10M 3720K sleep 59 0 0:00:07 0.0% svc.startd/12
304 root 2520K 1128K sleep 59 0 0:00:00 0.0% sac/1
1 root 2928K 1480K sleep 59 0 0:00:00 0.0% init/1
Total: 45 processes, 158 lwps, load averages: 2.32, 2.29, 2.20
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6028#comment:4>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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