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global start
global entry_io
global fd_io
global time_io
function timestamp:long() {
return gettimeofday_us() - start
}
function proc:string() {
return sprintf("%d (%s)", pid(), execname())
}
probe begin {
start = gettimeofday_us()
}
global filenames
global filehandles
global fileread
global filewrite
probe syscall.open {
filenames[pid()] = user_string($filename)
}
probe syscall.open.return {
if ($return != -1) {
filehandles[pid(), $return] = filenames[pid()]
fileread[pid(), $return] = 0
filewrite[pid(), $return] = 0
} else {
printf("%d %s access %s fail\n", timestamp(), proc(), filenames[pid()])
}
delete filenames[pid()]
}
probe syscall.read {
if ($count > 0) {
fileread[pid(), $fd] += $count
}
t = gettimeofday_us(); p = pid()
entry_io[p] = t
fd_io[p] = $fd
}
probe syscall.read.return {
t = gettimeofday_us(); p = pid()
fd = fd_io[p]
time_io[p,fd] <<< t - entry_io[p]
}
probe syscall.write {
if ($count > 0) {
filewrite[pid(), $fd] += $count
}
t = gettimeofday_us(); p = pid()
entry_io[p] = t
fd_io[p] = $fd
}
probe syscall.write.return {
t = gettimeofday_us(); p = pid()
fd = fd_io[p]
time_io[p,fd] <<< t - entry_io[p]
}
probe syscall.close {
if (filehandles[pid(), $fd] != "") {
printf("%d %s access %s read: %d write: %d\n", timestamp(), proc(),
filehandles[pid(), $fd], fileread[pid(), $fd], filewrite[pid(), $fd])
if (@count(time_io[pid(), $fd]))
printf("%d %s iotime %s time: %d\n", timestamp(), proc(),
filehandles[pid(), $fd], @sum(time_io[pid(), $fd]))
}
delete fileread[pid(), $fd]
delete filewrite[pid(), $fd]
delete filehandles[pid(), $fd]
delete fd_io[pid()]
delete entry_io[pid()]
delete time_io[pid(),$fd]
}
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