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global read_pages_start_time, read_pages_time, read_pages_longest
probe module("nfs").function("nfs_readpages")
{
read_pages_start_time = gettimeofday_us()
}
probe module("nfs").function("nfs_readpages").return
{
read_pages_time <<< gettimeofday_us() - read_pages_start_time
if (@max(read_pages_time) > read_pages_longest) {
printf ("%s: %s time avg %d max %d\n", execname(), probefunc(),
@avg(read_pages_time), @max(read_pages_time))
}
read_pages_longest = @max(read_pages_time)
}
/*
probe kernel.function("__do_page_cache_readahead")
{
printf("%s: back trace\n", probefunc())
print_stack(backtrace())
printf("\n");
}
*/
probe begin { log("starting nfs_readpages probe") }
probe end { log("ending nfs_readpages probe") }
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