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locktorture: Add new module parameters to lock_torture_print_module_parms()

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This commit adds new module parameters to lock_torture_print_module_parms,
and alphabetizes things while in the area.  This change makes locktorture
test results more useful and self-contained.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
This commit is contained in:
Paul E. McKenney 2023-08-21 16:42:21 -07:00 committed by Frederic Weisbecker
parent 92776c6240
commit 00c24c9cfa
1 changed files with 23 additions and 41 deletions
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64
kernel/locking/locktorture.c
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@ -47,8 +47,8 @@ torture_param(int, shuffle_interval, 3, "Number of jiffies between shuffles, 0=d
torture_param(int, shutdown_secs, 0, "Shutdown time (j), <= zero to disable.");
torture_param(int, stat_interval, 60, "Number of seconds between stats printk()s");
torture_param(int, stutter, 5, "Number of jiffies to run/halt test, 0=disable");
torture_param(int, writer_fifo, 0, "Run writers at sched_set_fifo() priority");
torture_param(int, verbose, 1, "Enable verbose debugging printk()s");
torture_param(int, writer_fifo, 0, "Run writers at sched_set_fifo() priority");
/* Going much higher trips "BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low!" errors */
#define MAX_NESTED_LOCKS 8
@ -166,12 +166,9 @@ static int torture_lock_busted_write_lock(int tid __maybe_unused)
static void torture_lock_busted_write_delay(struct torture_random_state *trsp)
{
const unsigned long longdelay_ms = long_hold ? long_hold : ULONG_MAX;
/* We want a long delay occasionally to force massive contention. */
if (!(torture_random(trsp) %
(cxt.nrealwriters_stress * 2000 * longdelay_ms)))
mdelay(longdelay_ms);
if (long_hold && !(torture_random(trsp) % (cxt.nrealwriters_stress * 2000 * long_hold)))
mdelay(long_hold);
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000)))
torture_preempt_schedule(); /* Allow test to be preempted. */
}
@ -244,15 +241,14 @@ __acquires(torture_spinlock)
static void torture_spin_lock_write_delay(struct torture_random_state *trsp)
{
const unsigned long shortdelay_us = 2;
const unsigned long longdelay_ms = long_hold ? long_hold : ULONG_MAX;
unsigned long j;
/* We want a short delay mostly to emulate likely code, and
* we want a long delay occasionally to force massive contention.
*/
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 2000 * longdelay_ms))) {
if (long_hold && !(torture_random(trsp) % (cxt.nrealwriters_stress * 2000 * long_hold))) {
j = jiffies;
mdelay(longdelay_ms);
mdelay(long_hold);
pr_alert("%s: delay = %lu jiffies.\n", __func__, jiffies - j);
}
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 200 * shortdelay_us)))
@ -370,14 +366,12 @@ __acquires(torture_rwlock)
static void torture_rwlock_write_delay(struct torture_random_state *trsp)
{
const unsigned long shortdelay_us = 2;
const unsigned long longdelay_ms = long_hold ? long_hold : ULONG_MAX;
/* We want a short delay mostly to emulate likely code, and
* we want a long delay occasionally to force massive contention.
*/
if (!(torture_random(trsp) %
(cxt.nrealwriters_stress * 2000 * longdelay_ms)))
mdelay(longdelay_ms);
if (long_hold && !(torture_random(trsp) % (cxt.nrealwriters_stress * 2000 * long_hold)))
mdelay(long_hold);
else
udelay(shortdelay_us);
}
@ -398,14 +392,12 @@ __acquires(torture_rwlock)
static void torture_rwlock_read_delay(struct torture_random_state *trsp)
{
const unsigned long shortdelay_us = 10;
const unsigned long longdelay_ms = 100;
/* We want a short delay mostly to emulate likely code, and
* we want a long delay occasionally to force massive contention.
*/
if (!(torture_random(trsp) %
(cxt.nrealreaders_stress * 2000 * longdelay_ms)))
mdelay(longdelay_ms);
if (long_hold && !(torture_random(trsp) % (cxt.nrealreaders_stress * 2000 * long_hold)))
mdelay(long_hold);
else
udelay(shortdelay_us);
}
@ -503,12 +495,9 @@ __acquires(torture_mutex)
static void torture_mutex_delay(struct torture_random_state *trsp)
{
const unsigned long longdelay_ms = long_hold ? long_hold : ULONG_MAX;
/* We want a long delay occasionally to force massive contention. */
if (!(torture_random(trsp) %
(cxt.nrealwriters_stress * 2000 * longdelay_ms)))
mdelay(longdelay_ms * 5);
if (long_hold && !(torture_random(trsp) % (cxt.nrealwriters_stress * 2000 * long_hold)))
mdelay(long_hold * 5);
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000)))
torture_preempt_schedule(); /* Allow test to be preempted. */
}
@ -676,15 +665,13 @@ __acquires(torture_rtmutex)
static void torture_rtmutex_delay(struct torture_random_state *trsp)
{
const unsigned long shortdelay_us = 2;
const unsigned long longdelay_ms = long_hold ? long_hold : ULONG_MAX;
/*
* We want a short delay mostly to emulate likely code, and
* we want a long delay occasionally to force massive contention.
*/
if (!(torture_random(trsp) %
(cxt.nrealwriters_stress * 2000 * longdelay_ms)))
mdelay(longdelay_ms);
if (long_hold && !(torture_random(trsp) % (cxt.nrealwriters_stress * 2000 * long_hold)))
mdelay(long_hold);
if (!(torture_random(trsp) %
(cxt.nrealwriters_stress * 200 * shortdelay_us)))
udelay(shortdelay_us);
@ -741,12 +728,9 @@ __acquires(torture_rwsem)
static void torture_rwsem_write_delay(struct torture_random_state *trsp)
{
const unsigned long longdelay_ms = long_hold ? long_hold : ULONG_MAX;
/* We want a long delay occasionally to force massive contention. */
if (!(torture_random(trsp) %
(cxt.nrealwriters_stress * 2000 * longdelay_ms)))
mdelay(longdelay_ms * 10);
if (long_hold && !(torture_random(trsp) % (cxt.nrealwriters_stress * 2000 * long_hold)))
mdelay(long_hold * 10);
if (!(torture_random(trsp) % (cxt.nrealwriters_stress * 20000)))
torture_preempt_schedule(); /* Allow test to be preempted. */
}
@ -766,14 +750,11 @@ __acquires(torture_rwsem)
static void torture_rwsem_read_delay(struct torture_random_state *trsp)
{
const unsigned long longdelay_ms = 100;
/* We want a long delay occasionally to force massive contention. */
if (!(torture_random(trsp) %
(cxt.nrealreaders_stress * 2000 * longdelay_ms)))
mdelay(longdelay_ms * 2);
if (long_hold && !(torture_random(trsp) % (cxt.nrealreaders_stress * 2000 * long_hold)))
mdelay(long_hold * 2);
else
mdelay(longdelay_ms / 2);
mdelay(long_hold / 2);
if (!(torture_random(trsp) % (cxt.nrealreaders_stress * 20000)))
torture_preempt_schedule(); /* Allow test to be preempted. */
}
@ -1056,11 +1037,12 @@ lock_torture_print_module_parms(struct lock_torture_ops *cur_ops,
cpumask_setall(&cpumask_all);
pr_alert("%s" TORTURE_FLAG
"--- %s%s: nwriters_stress=%d nreaders_stress=%d nested_locks=%d stat_interval=%d verbose=%d shuffle_interval=%d stutter=%d shutdown_secs=%d onoff_interval=%d onoff_holdoff=%d readers_bind=%*pbl writers_bind=%*pbl\n",
"--- %s%s: acq_writer_lim=%d long_hold=%d nested_locks=%d nreaders_stress=%d nwriters_stress=%d onoff_holdoff=%d onoff_interval=%d rt_boost=%d rt_boost_factor=%d shuffle_interval=%d shutdown_secs=%d stat_interval=%d stutter=%d verbose=%d writer_fifo=%d readers_bind=%*pbl writers_bind=%*pbl\n",
torture_type, tag, cxt.debug_lock ? " [debug]": "",
cxt.nrealwriters_stress, cxt.nrealreaders_stress,
nested_locks, stat_interval, verbose, shuffle_interval,
stutter, shutdown_secs, onoff_interval, onoff_holdoff,
acq_writer_lim, long_hold, nested_locks, cxt.nrealreaders_stress,
cxt.nrealwriters_stress, onoff_holdoff, onoff_interval, rt_boost,
rt_boost_factor, shuffle_interval, shutdown_secs, stat_interval, stutter,
verbose, writer_fifo,
cpumask_pr_args(rcmp), cpumask_pr_args(wcmp));
}