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GNU Parallel Bug Reports niceload on debian (iostat format)
From: |
Christian Jobic |
Subject: |
GNU Parallel Bug Reports niceload on debian (iostat format) |
Date: |
Wed, 26 Oct 2011 18:59:07 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
Hello,
niceload not work correctly on Debian. The problem is the output format
of iostat on Debian.
We have on niceload :
---8<-------------------------------
630 sub io_status_linux {
631 # Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz
avgqu-sz await r_await w_await svctm %util
632 # sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00
0.00 0.00 0.00 0.00 0.00 0.00
633 my @iostat_out = `LANG=C iostat -x 1 2`;
634 # throw away all execpt the last Device:-section
635 my @iostat;
636 for(reverse @iostat_out) {
637 /Device:/ and last;
638 push @iostat, (split(/\s+/,$_))[13];
639 }
640 my $io = ::max(@iostat);
641 return $io/10;
642 }
---8<-------------------------------
On Debian stable and old-stable (squeeze and lenny, the pb is the same on
ubuntu LTS)
the format of iostat is like :
---8<-------------------------------
Linux 2.6.32-5-vserver-686-bigmem (pc5014) 10/26/11 _i686_ (4 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
2.93 0.14 1.63 0.26 0.00 95.03
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz
avgqu-sz await svctm %util
sda 0.79 9.53 1.14 4.01 44.68 108.66 29.82
0.04 6.47 1.49 0.77
avg-cpu: %user %nice %system %iowait %steal %idle
4.15 0.00 2.44 0.00 0.00 93.41
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz
avgqu-sz await svctm %util
sda 0.00 14.00 0.00 4.00 0.00 144.00 36.00
0.00 0.00 0.00 0.00
---8<-------------------------------
On line 638 the '13' is not good (we have 12 args and not 14).
I suggest to replace the line 638 :
---8<-------------------------------
638 push @iostat, (split(/\s+/,$_))[13];
---8<-------------------------------
by
---8<-------------------------------
638 push @iostat, (split(/\s+/,$_))[-1];
---8<-------------------------------
The '-1' is the last arg of the iostat's line, its work for me.
Big tanks for GNU parallel !
Sory for my very bad english.
Cordialement,
--
C-Jobic - LCPC
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