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xnpcz
2009 Mar 20
1
suspicious dtrace results
i am doing reads and writes to /dev/rdsk/c0t2d0s4
using dtrace to see how much time it took for ssdread and ssdwrite. It shows very small number 4 or 5.
#pragma D option flowindent
syscall::pread:entry
{
self->trace = 1;
self->size = arg2;
}
syscall::pwrite:entry
{
self->trace = 1;
self->size = arg2;
}
fbt:ssd:ssdread:entry
/self->trace/
{
self->start = timestamp;