Nirmal,
We don't have a tracing component for the VFS. Component tracing on
the server is enabled for each component with:
pvfs2-set-eventmask -a 0x4 -o 0x9
That enables the TROVE api (disk accesses), specifically the
WRITE_LIST operation is only enabled. The values of the api and
operation must be hexidecimal. See the list of apis and operations
below.
The current version of PVFS doesn't support event tracing on the
client. We hope to have that working in a future version though.
-sam
APIs:
BMI 0x2
TROVE 0x4
SM 0x80
Operations:
BMI_SEND = 1,
BMI_RECV = 2,
FLOW = 3,
TROVE_READ_AT = 4,
TROVE_WRITE_AT = 5,
TROVE_BSTREAM_FLUSH = 6,
TROVE_KEYVAL_FLUSH = 7,
TROVE_READ_LIST = 8,
TROVE_WRITE_LIST = 9,
TROVE_KEYVAL_READ = 10,
TROVE_KEYVAL_READ_LIST = 11,
TROVE_KEYVAL_WRITE = 12,
TROVE_DSPACE_GETATTR = 13,
TROVE_DSPACE_SETATTR = 14,
TROVE_BSTREAM_RESIZE = 15,
TROVE_KEYVAL_REMOVE = 16,
TROVE_KEYVAL_ITERATE = 17,
TROVE_KEYVAL_ITERATE_KEYS = 18,
TROVE_DSPACE_ITERATE_HANDLES = 19,
TROVE_DSPACE_CREATE = 20,
TROVE_DSPACE_REMOVE = 21,
TROVE_DSPACE_VERIFY = 22,
TROVE_BSTREAM_VALIDATE = 23,
TROVE_KEYVAL_VALIDATE = 24,
TROVE_KEYVAL_WRITE_LIST = 25,
TROVE_KEYVAL_GET_HANDLE_INFO = 26,
TROVE_DSPACE_GETATTR_LIST = 27,
TROVE_KEYVAL_REMOVE_LIST = 28,
On Nov 18, 2008, at 10:24 AM, Nirmal Thacker wrote:
That would be great!
I'd like to probably trace each of those separately and if there is
any
tracing possible on the client side as well
Particularly the client side VFS tracing when I go through the VFS
would
be interesting to note. I'd also like the server operation and disk
operation traces and network traces to discount for the time I spend
on
the network
Nirmal
Sam Lang wrote:
Hi Nirmal,
You can restrict it to trace only network events, only disk events,
or
only server operation events. The default event driver just keeps a
ring of events until they're requested with pvfs2-event-mon-example.
Unfortunately, there's no good documentation for it. I can give you
more detail if you need it. What are you are looking to do?
-sam
On Nov 13, 2008, at 12:54 PM, Nirmal Thacker wrote:
Hello,
I am trying to perform event tracing with PVFS- before I maybe
perform
my own instrumentation, I wanted to check out pvfs2-set-eventmask
I mostly understood its one form of usage from a thread on the list
archives
[http://www.beowulf-underground.org/pipermail/pvfs2-developers/2006-January/001774.html
]
I'd like to know if there are more variations to the usage. For
example
are there more levels of tracing? Can the tracing be restricted to
only
what I require?
Is this documented in more detail somewhere ?
Thanks
Nirmal
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