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#! /usr/bin/env ktap
# Based on systemtap traceio.stp
#this script is broken, fix it soon.
reads = aggr_table()
writes = aggr_table()
total_io = aggr_table()
trace syscalls:sys_exit_read {
reads[execname()] = sum(arg2)
total_io[execname()] = sum(arg2)
}
trace syscalls:sys_exit_write {
writes[execname()] = sum(arg2)
total_io[execname()] = sum(arg2)
}
function humanread_digit(bytes) {
if (bytes > 1024*1024*1024) {
return bytes/1024/1024/1024
} elseif (bytes > 1024*1024) {
return bytes/1024/1024
} elseif (bytes > 1024) {
return bytes/1024
} else {
return bytes
}
}
function humanread_x(bytes) {
if (bytes > 1024*1024*1024) {
return " GiB"
} elseif (bytes > 1024*1024) {
return " MiB"
} elseif (bytes > 1024) {
return " KiB"
} else {
return " B"
}
}
tick-1s {
ansi.clear_screen()
for (exec, count in pairs(total_io)) {
local readnum = reads[exec]
local writenum = writes[exec]
printf("%15s r: %12d%s w: %12d%s\n", exec,
humanread_digit(readnum), humanread_x(readnum),
humanread_digit(writenum), humanread_x(writenum))
}
printf("\n")
}
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