Linux equivalent of prstat

I was intently used prstat Unix command on Sun Solaris trying to gather the information of number of the threads per process trying to audit the software fired threads per request to perform an action (need to skip details of the project).

That is just small helper that does the same on Linux

ps -o nlwp -p 7447

In addition, you might want (sorry, habits) to look for a Linux equivalent to Sun Solaris prstat -a command, that returns something like that:

 NPROC USERNAME  SWAP   RSS MEMORY      TIME  CPU
    24 root      211M  218M   2.7%  65:36:22 0.1%
     3 azarutin 6672K   13M   0.2%   0:00:00 0.0%
     1 abcd     4312K 7664K   0.1%   0:00:19 0.0%
     1 nagios    496K 4440K   0.1%   0:16:31 0.0%
     7 daemon   8840K 9832K   0.1%   0:20:18 0.0%<

The following Perl code does almost the same:

#!/usr/bin/env perl

my @ps = `/bin/ps aux`;
my @headers = split(/\s+/, shift(@ps));
my %users;

foreach (@ps) {
  chomp;
  my $col = 0;
  my %ps_entry;
  foreach (split(/\s+/, $_, $#headers + 1)) {
    $ps_entry{$headers[$col]} = $_;
    $col++;
  }

  next unless exists $ps_entry{USER};
  $users{$ps_entry{USER}} = { nproc=>0, size=>0, rss=>0, mem=>0, time=>0, cpu=>0 } unless exists $users{$ps_entry{USER}};
  my $user = $users{$ps_entry{USER}};

  $user->{nproc}++;
  $user->{size} += $ps_entry{VSZ} if exists $ps_entry{VSZ};
  $user->{rss} += $ps_entry{RSS} if exists $ps_entry{RSS};
  $user->{mem} += $ps_entry{'%MEM'} if exists $ps_entry{'%MEM'};
  $user->{cpu} += $ps_entry{'%CPU'} if exists $ps_entry{'%CPU'};
  $user->{time} += ($1 * 60) + $2 if (exists $ps_entry{'TIME'} && $ps_entry{'TIME'} =~ /^([0-9]+):([0-9]+)$/);
}

print "NPROC\tUSER\tSIZE\tRSS\tMEMORY\tTIME\tCPU\n";
foreach (sort { $users{$b}{cpu} <=> $users{$a}{cpu} } keys(%users)) {
  printf("%d\t%s\t%d\t%d\t%.1f\%\t%.2d:%.2d\t%.1f\%\n", $users{$_}{nproc}, $_, $users{$_}{size}, $users{$_}{rss}, $users{$_}{mem}, ($users{$_}{time} / 60), ($users{$_}{time} % 60), $users{$_}{cpu});
}

and returns the following result:

[azarutin@hope server]$ ./prstat.pl
NPROC   USER    SIZE    RSS     MEMORY  TIME    CPU
62      azarutin        3955900 2308224 41.1%   82:07   1.1%
1       ntp     4420    4416    0.0%    00:00   0.0%
1       rpc     1924    524     0.0%    00:00   0.0%
1       smmsp   8300    1516    0.0%    00:00   0.0%
1       ricci   8288    1048    0.0%    00:00   0.0%
3       68      10596   3016    0.0%    00:10   0.0%
1       nobody  1932    432     0.0%    00:00   0.0%
1       dbus    3320    1332    0.0%    00:10   0.0%
1       rpcuser 2084    840     0.0%    00:00   0.0%
1       mysql   135408  23004   0.4%    00:01   0.0%
1       xfs     4360    2244    0.0%    00:01   0.0%
117     root    681476  101284  0.8%    21:31   0.0%
2       avahi   6456    1672    0.0%    00:41   0.0%

Enjoy !!!