greybus: loopback: graph round-trip time for all threads

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This patch adds the ability to time the delta between all threads like this

t1 = timestmap();
thread1:gb_operation_sync();
thread2:gb_operation_sync();
t2 = timestamp();

In order to enable that behaviour without forcing an undesirable
checkpointing scheme this patch introduces a kfifo for each thread to store
the raw timestamps and calculate a time difference.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

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Bryan O'Donoghue 2015-08-17 00:55:07 +01:00 • committed by Greg Kroah-Hartman

parent 7c985351d4

commit 4b0ea00caf

1 changed files with 140 additions and 15 deletions

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155

drivers/staging/greybus/loopback.c

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