• Paul E. McKenney's avatar
    rcuperf: Add ability to performance-test call_rcu() and friends · 881ed593
    Paul E. McKenney authored
    This commit upgrades rcuperf so that it can do performance testing on
    asynchronous grace-period primitives such as call_srcu().  There is
    a new rcuperf.gp_async module parameter that specifies this new behavior,
    with the pre-existing rcuperf.gp_exp testing expedited grace periods such as
    synchronize_rcu_expedited, and with the default being to test synchronous
    non-expedited grace periods such as synchronize_rcu().
    There is also a new rcuperf.gp_async_max module parameter that specifies
    the maximum number of outstanding callbacks per writer kthread, defaulting
    to 1,000.  When this limit is exceeded, the writer thread invokes the
    appropriate flavor of rcu_barrier() to wait for callbacks to drain.
    Signed-off-by: default avatarPaul E. McKenney <paulmck@linux.vnet.ibm.com>
    [ paulmck: Removed the redundant initialization noted by Arnd Bergmann. ]
kernel-parameters.txt 156 KB