Created
March 10, 2012 19:20
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copy of Brenden Gregg's hfsslower.d
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#!/usr/sbin/dtrace -s | |
#pragma D option quiet | |
#pragma D option defaultargs | |
#pragma D option switchrate=10hz | |
/* from http://dtrace.org/blogs/brendan/2011/10/10/top-10-dtrace-scripts-for-mac-os-x/ */ | |
dtrace:::BEGIN | |
{ | |
printf("%-20s %-16s %1s %4s %6s %s\n", "TIME", "PROCESS", | |
"D", "KB", "ms", "FILE"); | |
min_ns = $1 * 1000000; | |
} | |
/* see bsd/hfs/hfs_vnops.c */ | |
fbt::hfs_vnop_read:entry | |
{ | |
this->read = (struct vnop_read_args *)arg0; | |
self->path = this->read->a_vp->v_name; | |
self->kb = this->read->a_uio->uio_resid_64 / 1024; | |
self->start = timestamp; | |
} | |
fbt::hfs_vnop_write:entry | |
{ | |
this->write = (struct vnop_write_args *)arg0; | |
self->path = this->write->a_vp->v_name; | |
self->kb = this->write->a_uio->uio_resid_64 / 1024; | |
self->start = timestamp; | |
} | |
fbt::hfs_vnop_read:return, | |
fbt::hfs_vnop_write:return | |
/self->start && (timestamp - self->start) >= min_ns/ | |
{ | |
this->iotime = (timestamp - self->start) / 1000000; | |
this->dir = probefunc == "hfs_vnop_read" ? "R" : "W"; | |
printf("%-20Y %-16s %1s %4d %6d %s\n", walltimestamp, | |
execname, this->dir, self->kb, this->iotime, | |
self->path != NULL ? stringof(self->path) : "<null>"); | |
} | |
fbt::hfs_vnop_read:return, | |
fbt::hfs_vnop_write:return | |
{ | |
self->path = 0; self->kb = 0; self->start = 0; | |
} |
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