diff options
Diffstat (limited to 'bin/iostats')
| -rwxr-xr-x | bin/iostats | 88 |
1 files changed, 59 insertions, 29 deletions
diff --git a/bin/iostats b/bin/iostats index d55d550..0e96e29 100755 --- a/bin/iostats +++ b/bin/iostats @@ -3,51 +3,81 @@ # Usage: pipe the output of Linux's `strace' program into the stdin of # this command, and the output of this command into gnuplot. +my ($fast,$npasses); +if ($ARGV[0] =~ /^--?fast$/) { + $fast = 1; + shift; +} + my $filename = shift || "tstab2.h5"; my $total = 0; my %What; # What{pos}{nbytes}{r|w} = naccesses +my($total_writes, $total_bytes_out, $total_reads, $total_bytes_in); while (<>) { - if (!defined $fd) { - if (/^open\("(.*?)".*=\s+(\d+)/ && $1 eq $filename) { - $fd = $2; - $pos = 0; - } - } elsif (/^close\((\d+)/ && $1==$fd) { - $fd = undef; - } elsif (/^lseek\((\d+), -?\d+,.*= (\d+)/ && - $1==$fd && $2>=0) { - $pos = $2; - } elsif (/^lseek\((\d+),/ && $1==$fd) { - die $_; - } elsif (/^write\((\d+), ".*?"(\.\.\.)?, \d+\)\s*= (\d+)/ && - $1==$fd && $3>=0) { - my $nbytes = $3; + if (!defined $fd) { + if (/^open\("(.*?)".*=\s+(\d+)/ && $1 eq $filename) { + $fd = $2; + $pos = 0; + } + } elsif (/^close\((\d+)/ && $1==$fd) { + $fd = undef; + } elsif (!$fast && + /^lseek\((\d+), -?\d+,.*= (\d+)/ && + $1==$fd && $2>=0) { + $pos = $2; + } elsif (!$fast && /^lseek\((\d+),/ && $1==$fd) { + die $_; + } elsif (/^write\((\d+), ".*?"(\.\.\.)?, \d+\)\s*= (\d+)/ && + $1==$fd && $3>=0) { + my $nbytes = $3; + if ($fast) { + $total_writes++; + $total_bytes_out += $nbytes; + } else { $What{$pos}{$nbytes}{w}++; printf "%d %d\n", $total, $pos; $pos += $nbytes; $total += $nbytes; - } elsif (/^write\((\d+),/ && $1==$fd) { - die $_; - } elsif (/^read\((\d+), ".*?"(\.\.\.)?, \d+\)\s*= (\d+)/ && - $1==$fd && $3>=0) { - my $nbytes = $3; + } + } elsif (/^write\((\d+),/ && $1==$fd) { + die $_; + } elsif (/^read\((\d+), ".*?"(\.\.\.)?, \d+\)\s*= (\d+)/ && + $1==$fd && $3>=0) { + my $nbytes = $3; + if ($fast) { + $total_reads++; + $total_bytes_in += $nbytes; + } else { $What{$pos}{$nbytes}{r}++; printf "%d %d\n", $total, $pos; $pos += $nbytes; $total += $nbytes; - } elsif (/^read\((\d+),/ && $1==$fd) { - die $_; - } + } + } elsif (/^read\((\d+),/ && $1==$fd) { + die $_; + } } -print "="x36, "\n"; +if (!$fast) { + print "="x36, "\n"; printf "%8s %8s %8s %8s\n","Position","NBytes","NReads","NWrites"; -for $pos (sort {$a<=>$b} keys %What) { - for $nbytes (sort {$a<=>$b} keys %{$What{$pos}}) { - printf "%8d %8d %8d %8d\n", $pos, $nbytes, - $What{$pos}{$nbytes}{r}, - $What{$pos}{$nbytes}{w}; + for $pos (sort {$a<=>$b} keys %What) { + for $nbytes (sort {$a<=>$b} keys %{$What{$pos}}) { + printf("%8d %8d %8d %8d\n", $pos, $nbytes, + $What{$pos}{$nbytes}{r}, + $What{$pos}{$nbytes}{w}); + $total_writes += $What{$pos}{$nbytes}{w}; + $total_reads += $What{$pos}{$nbytes}{r}; + $total_bytes_out += $What{$pos}{$nbytes}{w} * $nbytes; + $total_bytes_in += $What{$pos}{$nbytes}{r} * $nbytes; + } } } + +print "="x36, "\n"; +printf("Write: %8d calls, %10d total bytes, %10g average bytes\n", + $total_writes, $total_bytes_out, $total_bytes_out/$total_writes); +printf("Read: %8d calls, %10d total bytes, %10g average bytes\n", + $total_reads, $total_bytes_in, $total_bytes_in/$total_reads); |