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rcuperf: Change rcuperf to rcuscale

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This commit further avoids conflation of rcuperf with the kernel's perf
feature by renaming kernel/rcu/rcuperf.c to kernel/rcu/rcuscale.c, and
also by similarly renaming the functions and variables inside this file.
This has the side effect of changing the names of the kernel boot
parameters, so kernel-parameters.txt and ver_functions.sh are also
updated.  The rcutorture --torture type was also updated from rcuperf
to rcuscale.

[ paulmck: Fix bugs located by Stephen Rothwell. ]
Reported-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney 2020-08-11 21:18:12 -07:00
parent 65bd77f554
commit 4e88ec4a9e
16 changed files with 207 additions and 206 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
Documentation/admin-guide/kernel-parameters.txt
View File

@ -4157,41 +4157,41 @@
rcu_node tree with an eye towards determining
why a new grace period has not yet started.
rcuperf.gp_async= [KNL]
rcuscale.gp_async= [KNL]
Measure performance of asynchronous
grace-period primitives such as call_rcu().
rcuperf.gp_async_max= [KNL]
rcuscale.gp_async_max= [KNL]
Specify the maximum number of outstanding
callbacks per writer thread. When a writer
thread exceeds this limit, it invokes the
corresponding flavor of rcu_barrier() to allow
previously posted callbacks to drain.
rcuperf.gp_exp= [KNL]
rcuscale.gp_exp= [KNL]
Measure performance of expedited synchronous
grace-period primitives.
rcuperf.holdoff= [KNL]
rcuscale.holdoff= [KNL]
Set test-start holdoff period. The purpose of
this parameter is to delay the start of the
test until boot completes in order to avoid
interference.
rcuperf.kfree_rcu_test= [KNL]
rcuscale.kfree_rcu_test= [KNL]
Set to measure performance of kfree_rcu() flooding.
rcuperf.kfree_nthreads= [KNL]
rcuscale.kfree_nthreads= [KNL]
The number of threads running loops of kfree_rcu().
rcuperf.kfree_alloc_num= [KNL]
rcuscale.kfree_alloc_num= [KNL]
Number of allocations and frees done in an iteration.
rcuperf.kfree_loops= [KNL]
Number of loops doing rcuperf.kfree_alloc_num number
rcuscale.kfree_loops= [KNL]
Number of loops doing rcuscale.kfree_alloc_num number
of allocations and frees.
rcuperf.nreaders= [KNL]
rcuscale.nreaders= [KNL]
Set number of RCU readers. The value -1 selects
N, where N is the number of CPUs. A value
"n" less than -1 selects N-n+1, where N is again
@ -4200,23 +4200,23 @@
A value of "n" less than or equal to -N selects
a single reader.
rcuperf.nwriters= [KNL]
rcuscale.nwriters= [KNL]
Set number of RCU writers. The values operate
the same as for rcuperf.nreaders.
the same as for rcuscale.nreaders.
N, where N is the number of CPUs
rcuperf.perf_type= [KNL]
rcuscale.perf_type= [KNL]
Specify the RCU implementation to test.
rcuperf.shutdown= [KNL]
rcuscale.shutdown= [KNL]
Shut the system down after performance tests
complete. This is useful for hands-off automated
testing.
rcuperf.verbose= [KNL]
rcuscale.verbose= [KNL]
Enable additional printk() statements.
rcuperf.writer_holdoff= [KNL]
rcuscale.writer_holdoff= [KNL]
Write-side holdoff between grace periods,
in microseconds. The default of zero says
no holdoff.
@ -4490,8 +4490,8 @@
refscale.shutdown= [KNL]
Shut down the system at the end of the performance
test. This defaults to 1 (shut it down) when
rcuperf is built into the kernel and to 0 (leave
it running) when rcuperf is built as a module.
refscale is built into the kernel and to 0 (leave
it running) when refscale is built as a module.
refscale.verbose= [KNL]
Enable additional printk() statements.

3
MAINTAINERS
View File

@ -17510,8 +17510,9 @@ S: Supported
T: git git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev
F: Documentation/RCU/torture.rst
F: kernel/locking/locktorture.c
F: kernel/rcu/rcuperf.c
F: kernel/rcu/rcuscale.c
F: kernel/rcu/rcutorture.c
F: kernel/rcu/refscale.c
F: kernel/torture.c
TOSHIBA ACPI EXTRAS DRIVER

2
kernel/rcu/Kconfig.debug
View File

@ -23,7 +23,7 @@ config TORTURE_TEST
tristate
default n
config RCU_PERF_TEST
config RCU_SCALE_TEST
tristate "performance tests for RCU"
depends on DEBUG_KERNEL
select TORTURE_TEST

2
kernel/rcu/Makefile
View File

@ -11,7 +11,7 @@ obj-y += update.o sync.o
obj-$(CONFIG_TREE_SRCU) += srcutree.o
obj-$(CONFIG_TINY_SRCU) += srcutiny.o
obj-$(CONFIG_RCU_TORTURE_TEST) += rcutorture.o
obj-$(CONFIG_RCU_PERF_TEST) += rcuperf.o
obj-$(CONFIG_RCU_SCALE_TEST) += rcuscale.o
obj-$(CONFIG_RCU_REF_SCALE_TEST) += refscale.o
obj-$(CONFIG_TREE_RCU) += tree.o
obj-$(CONFIG_TINY_RCU) += tiny.o

330
kernel/rcu/rcuperf.c → kernel/rcu/rcuscale.c
View File

@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Read-Copy Update module-based performance-test facility
* Read-Copy Update module-based scalability-test facility
*
* Copyright (C) IBM Corporation, 2015
*
@ -44,13 +44,13 @@
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Paul E. McKenney <paulmck@linux.ibm.com>");
#define PERF_FLAG "-perf:"
#define PERFOUT_STRING(s) \
pr_alert("%s" PERF_FLAG " %s\n", perf_type, s)
#define VERBOSE_PERFOUT_STRING(s) \
do { if (verbose) pr_alert("%s" PERF_FLAG " %s\n", perf_type, s); } while (0)
#define VERBOSE_PERFOUT_ERRSTRING(s) \
do { if (verbose) pr_alert("%s" PERF_FLAG "!!! %s\n", perf_type, s); } while (0)
#define SCALE_FLAG "-scale:"
#define SCALEOUT_STRING(s) \
pr_alert("%s" SCALE_FLAG " %s\n", scale_type, s)
#define VERBOSE_SCALEOUT_STRING(s) \
do { if (verbose) pr_alert("%s" SCALE_FLAG " %s\n", scale_type, s); } while (0)
#define VERBOSE_SCALEOUT_ERRSTRING(s) \
do { if (verbose) pr_alert("%s" SCALE_FLAG "!!! %s\n", scale_type, s); } while (0)
/*
* The intended use cases for the nreaders and nwriters module parameters
@ -61,25 +61,25 @@ MODULE_AUTHOR("Paul E. McKenney <paulmck@linux.ibm.com>");
* nr_cpus for a mixed reader/writer test.
*
* 2. Specify the nr_cpus kernel boot parameter, but set
* rcuperf.nreaders to zero. This will set nwriters to the
* rcuscale.nreaders to zero. This will set nwriters to the
* value specified by nr_cpus for an update-only test.
*
* 3. Specify the nr_cpus kernel boot parameter, but set
* rcuperf.nwriters to zero. This will set nreaders to the
* rcuscale.nwriters to zero. This will set nreaders to the
* value specified by nr_cpus for a read-only test.
*
* Various other use cases may of course be specified.
*
* Note that this test's readers are intended only as a test load for
* the writers. The reader performance statistics will be overly
* the writers. The reader scalability statistics will be overly
* pessimistic due to the per-critical-section interrupt disabling,
* test-end checks, and the pair of calls through pointers.
*/
#ifdef MODULE
# define RCUPERF_SHUTDOWN 0
# define RCUSCALE_SHUTDOWN 0
#else
# define RCUPERF_SHUTDOWN 1
# define RCUSCALE_SHUTDOWN 1
#endif
torture_param(bool, gp_async, false, "Use asynchronous GP wait primitives");
@ -88,16 +88,16 @@ torture_param(bool, gp_exp, false, "Use expedited GP wait primitives");
torture_param(int, holdoff, 10, "Holdoff time before test start (s)");
torture_param(int, nreaders, -1, "Number of RCU reader threads");
torture_param(int, nwriters, -1, "Number of RCU updater threads");
torture_param(bool, shutdown, RCUPERF_SHUTDOWN,
"Shutdown at end of performance tests.");
torture_param(bool, shutdown, RCUSCALE_SHUTDOWN,
"Shutdown at end of scalability tests.");
torture_param(int, verbose, 1, "Enable verbose debugging printk()s");
torture_param(int, writer_holdoff, 0, "Holdoff (us) between GPs, zero to disable");
torture_param(int, kfree_rcu_test, 0, "Do we run a kfree_rcu() perf test?");
torture_param(int, kfree_rcu_test, 0, "Do we run a kfree_rcu() scale test?");
torture_param(int, kfree_mult, 1, "Multiple of kfree_obj size to allocate.");
static char *perf_type = "rcu";
module_param(perf_type, charp, 0444);
MODULE_PARM_DESC(perf_type, "Type of RCU to performance-test (rcu, srcu, ...)");
static char *scale_type = "rcu";
module_param(scale_type, charp, 0444);
MODULE_PARM_DESC(scale_type, "Type of RCU to scalability-test (rcu, srcu, ...)");
static int nrealreaders;
static int nrealwriters;
@ -107,12 +107,12 @@ static struct task_struct *shutdown_task;
static u64 **writer_durations;
static int *writer_n_durations;
static atomic_t n_rcu_perf_reader_started;
static atomic_t n_rcu_perf_writer_started;
static atomic_t n_rcu_perf_writer_finished;
static atomic_t n_rcu_scale_reader_started;
static atomic_t n_rcu_scale_writer_started;
static atomic_t n_rcu_scale_writer_finished;
static wait_queue_head_t shutdown_wq;
static u64 t_rcu_perf_writer_started;
static u64 t_rcu_perf_writer_finished;
static u64 t_rcu_scale_writer_started;
static u64 t_rcu_scale_writer_finished;
static unsigned long b_rcu_gp_test_started;
static unsigned long b_rcu_gp_test_finished;
static DEFINE_PER_CPU(atomic_t, n_async_inflight);
@ -124,7 +124,7 @@ static DEFINE_PER_CPU(atomic_t, n_async_inflight);
* Operations vector for selecting different types of tests.
*/
struct rcu_perf_ops {
struct rcu_scale_ops {
int ptype;
void (*init)(void);
void (*cleanup)(void);
@ -140,19 +140,19 @@ struct rcu_perf_ops {
const char *name;
};
static struct rcu_perf_ops *cur_ops;
static struct rcu_scale_ops *cur_ops;
/*
* Definitions for rcu perf testing.
* Definitions for rcu scalability testing.
*/
static int rcu_perf_read_lock(void) __acquires(RCU)
static int rcu_scale_read_lock(void) __acquires(RCU)
{
rcu_read_lock();
return 0;
}
static void rcu_perf_read_unlock(int idx) __releases(RCU)
static void rcu_scale_read_unlock(int idx) __releases(RCU)
{
rcu_read_unlock();
}
@ -162,15 +162,15 @@ static unsigned long __maybe_unused rcu_no_completed(void)
return 0;
}
static void rcu_sync_perf_init(void)
static void rcu_sync_scale_init(void)
{
}
static struct rcu_perf_ops rcu_ops = {
static struct rcu_scale_ops rcu_ops = {
.ptype = RCU_FLAVOR,
.init = rcu_sync_perf_init,
.readlock = rcu_perf_read_lock,
.readunlock = rcu_perf_read_unlock,
.init = rcu_sync_scale_init,
.readlock = rcu_scale_read_lock,
.readunlock = rcu_scale_read_unlock,
.get_gp_seq = rcu_get_gp_seq,
.gp_diff = rcu_seq_diff,
.exp_completed = rcu_exp_batches_completed,
@ -182,23 +182,23 @@ static struct rcu_perf_ops rcu_ops = {
};
/*
* Definitions for srcu perf testing.
* Definitions for srcu scalability testing.
*/
DEFINE_STATIC_SRCU(srcu_ctl_perf);
static struct srcu_struct *srcu_ctlp = &srcu_ctl_perf;
DEFINE_STATIC_SRCU(srcu_ctl_scale);
static struct srcu_struct *srcu_ctlp = &srcu_ctl_scale;
static int srcu_perf_read_lock(void) __acquires(srcu_ctlp)
static int srcu_scale_read_lock(void) __acquires(srcu_ctlp)
{
return srcu_read_lock(srcu_ctlp);
}
static void srcu_perf_read_unlock(int idx) __releases(srcu_ctlp)
static void srcu_scale_read_unlock(int idx) __releases(srcu_ctlp)
{
srcu_read_unlock(srcu_ctlp, idx);
}
static unsigned long srcu_perf_completed(void)
static unsigned long srcu_scale_completed(void)
{
return srcu_batches_completed(srcu_ctlp);
}
@ -213,78 +213,78 @@ static void srcu_rcu_barrier(void)
srcu_barrier(srcu_ctlp);
}
static void srcu_perf_synchronize(void)
static void srcu_scale_synchronize(void)
{
synchronize_srcu(srcu_ctlp);
}
static void srcu_perf_synchronize_expedited(void)
static void srcu_scale_synchronize_expedited(void)
{
synchronize_srcu_expedited(srcu_ctlp);
}
static struct rcu_perf_ops srcu_ops = {
static struct rcu_scale_ops srcu_ops = {
.ptype = SRCU_FLAVOR,
.init = rcu_sync_perf_init,
.readlock = srcu_perf_read_lock,
.readunlock = srcu_perf_read_unlock,
.get_gp_seq = srcu_perf_completed,
.init = rcu_sync_scale_init,
.readlock = srcu_scale_read_lock,
.readunlock = srcu_scale_read_unlock,
.get_gp_seq = srcu_scale_completed,
.gp_diff = rcu_seq_diff,
.exp_completed = srcu_perf_completed,
.exp_completed = srcu_scale_completed,
.async = srcu_call_rcu,
.gp_barrier = srcu_rcu_barrier,
.sync = srcu_perf_synchronize,
.exp_sync = srcu_perf_synchronize_expedited,
.sync = srcu_scale_synchronize,
.exp_sync = srcu_scale_synchronize_expedited,
.name = "srcu"
};
static struct srcu_struct srcud;
static void srcu_sync_perf_init(void)
static void srcu_sync_scale_init(void)
{
srcu_ctlp = &srcud;
init_srcu_struct(srcu_ctlp);
}
static void srcu_sync_perf_cleanup(void)
static void srcu_sync_scale_cleanup(void)
{
cleanup_srcu_struct(srcu_ctlp);
}
static struct rcu_perf_ops srcud_ops = {
static struct rcu_scale_ops srcud_ops = {
.ptype = SRCU_FLAVOR,
.init = srcu_sync_perf_init,
.cleanup = srcu_sync_perf_cleanup,
.readlock = srcu_perf_read_lock,
.readunlock = srcu_perf_read_unlock,
.get_gp_seq = srcu_perf_completed,
.init = srcu_sync_scale_init,
.cleanup = srcu_sync_scale_cleanup,
.readlock = srcu_scale_read_lock,
.readunlock = srcu_scale_read_unlock,
.get_gp_seq = srcu_scale_completed,
.gp_diff = rcu_seq_diff,
.exp_completed = srcu_perf_completed,
.exp_completed = srcu_scale_completed,
.async = srcu_call_rcu,
.gp_barrier = srcu_rcu_barrier,
.sync = srcu_perf_synchronize,
.exp_sync = srcu_perf_synchronize_expedited,
.sync = srcu_scale_synchronize,
.exp_sync = srcu_scale_synchronize_expedited,
.name = "srcud"
};
/*
* Definitions for RCU-tasks perf testing.
* Definitions for RCU-tasks scalability testing.
*/
static int tasks_perf_read_lock(void)
static int tasks_scale_read_lock(void)
{
return 0;
}
static void tasks_perf_read_unlock(int idx)
static void tasks_scale_read_unlock(int idx)
{
}
static struct rcu_perf_ops tasks_ops = {
static struct rcu_scale_ops tasks_ops = {
.ptype = RCU_TASKS_FLAVOR,
.init = rcu_sync_perf_init,
.readlock = tasks_perf_read_lock,
.readunlock = tasks_perf_read_unlock,
.init = rcu_sync_scale_init,
.readlock = tasks_scale_read_lock,
.readunlock = tasks_scale_read_unlock,
.get_gp_seq = rcu_no_completed,
.gp_diff = rcu_seq_diff,
.async = call_rcu_tasks,
@ -294,7 +294,7 @@ static struct rcu_perf_ops tasks_ops = {
.name = "tasks"
};
static unsigned long rcuperf_seq_diff(unsigned long new, unsigned long old)
static unsigned long rcuscale_seq_diff(unsigned long new, unsigned long old)
{
if (!cur_ops->gp_diff)
return new - old;
@ -302,60 +302,60 @@ static unsigned long rcuperf_seq_diff(unsigned long new, unsigned long old)
}
/*
* If performance tests complete, wait for shutdown to commence.
* If scalability tests complete, wait for shutdown to commence.
*/
static void rcu_perf_wait_shutdown(void)
static void rcu_scale_wait_shutdown(void)
{
cond_resched_tasks_rcu_qs();
if (atomic_read(&n_rcu_perf_writer_finished) < nrealwriters)
if (atomic_read(&n_rcu_scale_writer_finished) < nrealwriters)
return;
while (!torture_must_stop())
schedule_timeout_uninterruptible(1);
}
/*
* RCU perf reader kthread. Repeatedly does empty RCU read-side critical
* section, minimizing update-side interference. However, the point of
* this test is not to evaluate reader performance, but instead to serve
* as a test load for update-side performance testing.
* RCU scalability reader kthread. Repeatedly does empty RCU read-side
* critical section, minimizing update-side interference. However, the
* point of this test is not to evaluate reader scalability, but instead
* to serve as a test load for update-side scalability testing.
*/
static int
rcu_perf_reader(void *arg)
rcu_scale_reader(void *arg)
{
unsigned long flags;
int idx;
long me = (long)arg;
VERBOSE_PERFOUT_STRING("rcu_perf_reader task started");
VERBOSE_SCALEOUT_STRING("rcu_scale_reader task started");
set_cpus_allowed_ptr(current, cpumask_of(me % nr_cpu_ids));
set_user_nice(current, MAX_NICE);
atomic_inc(&n_rcu_perf_reader_started);
atomic_inc(&n_rcu_scale_reader_started);
do {
local_irq_save(flags);
idx = cur_ops->readlock();
cur_ops->readunlock(idx);
local_irq_restore(flags);
rcu_perf_wait_shutdown();
rcu_scale_wait_shutdown();
} while (!torture_must_stop());
torture_kthread_stopping("rcu_perf_reader");
torture_kthread_stopping("rcu_scale_reader");
return 0;
}
/*
* Callback function for asynchronous grace periods from rcu_perf_writer().
* Callback function for asynchronous grace periods from rcu_scale_writer().
*/
static void rcu_perf_async_cb(struct rcu_head *rhp)
static void rcu_scale_async_cb(struct rcu_head *rhp)
{
atomic_dec(this_cpu_ptr(&n_async_inflight));
kfree(rhp);
}
/*
* RCU perf writer kthread. Repeatedly does a grace period.
* RCU scale writer kthread. Repeatedly does a grace period.
*/
static int
rcu_perf_writer(void *arg)
rcu_scale_writer(void *arg)
{
int i = 0;
int i_max;
@ -366,7 +366,7 @@ rcu_perf_writer(void *arg)
u64 *wdp;
u64 *wdpp = writer_durations[me];
VERBOSE_PERFOUT_STRING("rcu_perf_writer task started");
VERBOSE_SCALEOUT_STRING("rcu_scale_writer task started");
WARN_ON(!wdpp);
set_cpus_allowed_ptr(current, cpumask_of(me % nr_cpu_ids));
sched_set_fifo_low(current);
@ -383,8 +383,8 @@ rcu_perf_writer(void *arg)
schedule_timeout_uninterruptible(1);
t = ktime_get_mono_fast_ns();
if (atomic_inc_return(&n_rcu_perf_writer_started) >= nrealwriters) {
t_rcu_perf_writer_started = t;
if (atomic_inc_return(&n_rcu_scale_writer_started) >= nrealwriters) {
t_rcu_scale_writer_started = t;
if (gp_exp) {
b_rcu_gp_test_started =
cur_ops->exp_completed() / 2;
@ -404,7 +404,7 @@ rcu_perf_writer(void *arg)
rhp = kmalloc(sizeof(*rhp), GFP_KERNEL);
if (rhp && atomic_read(this_cpu_ptr(&n_async_inflight)) < gp_async_max) {
atomic_inc(this_cpu_ptr(&n_async_inflight));
cur_ops->async(rhp, rcu_perf_async_cb);
cur_ops->async(rhp, rcu_scale_async_cb);
rhp = NULL;
} else if (!kthread_should_stop()) {
cur_ops->gp_barrier();
@ -421,19 +421,19 @@ rcu_perf_writer(void *arg)
*wdp = t - *wdp;
i_max = i;
if (!started &&
atomic_read(&n_rcu_perf_writer_started) >= nrealwriters)
atomic_read(&n_rcu_scale_writer_started) >= nrealwriters)
started = true;
if (!done && i >= MIN_MEAS) {
done = true;
sched_set_normal(current, 0);
pr_alert("%s%s rcu_perf_writer %ld has %d measurements\n",
perf_type, PERF_FLAG, me, MIN_MEAS);
if (atomic_inc_return(&n_rcu_perf_writer_finished) >=
pr_alert("%s%s rcu_scale_writer %ld has %d measurements\n",
scale_type, SCALE_FLAG, me, MIN_MEAS);
if (atomic_inc_return(&n_rcu_scale_writer_finished) >=
nrealwriters) {
schedule_timeout_interruptible(10);
rcu_ftrace_dump(DUMP_ALL);
PERFOUT_STRING("Test complete");
t_rcu_perf_writer_finished = t;
SCALEOUT_STRING("Test complete");
t_rcu_scale_writer_finished = t;
if (gp_exp) {
b_rcu_gp_test_finished =
cur_ops->exp_completed() / 2;
@ -448,30 +448,30 @@ rcu_perf_writer(void *arg)
}
}
if (done && !alldone &&
atomic_read(&n_rcu_perf_writer_finished) >= nrealwriters)
atomic_read(&n_rcu_scale_writer_finished) >= nrealwriters)
alldone = true;
if (started && !alldone && i < MAX_MEAS - 1)
i++;
rcu_perf_wait_shutdown();
rcu_scale_wait_shutdown();
} while (!torture_must_stop());
if (gp_async) {
cur_ops->gp_barrier();
}
writer_n_durations[me] = i_max;
torture_kthread_stopping("rcu_perf_writer");
torture_kthread_stopping("rcu_scale_writer");
return 0;
}
static void
rcu_perf_print_module_parms(struct rcu_perf_ops *cur_ops, const char *tag)
rcu_scale_print_module_parms(struct rcu_scale_ops *cur_ops, const char *tag)
{
pr_alert("%s" PERF_FLAG
pr_alert("%s" SCALE_FLAG
"--- %s: nreaders=%d nwriters=%d verbose=%d shutdown=%d\n",
perf_type, tag, nrealreaders, nrealwriters, verbose, shutdown);
scale_type, tag, nrealreaders, nrealwriters, verbose, shutdown);
}
static void
rcu_perf_cleanup(void)
rcu_scale_cleanup(void)
{
int i;
int j;
@ -484,11 +484,11 @@ rcu_perf_cleanup(void)
* during the mid-boot phase, so have to wait till the end.
*/
if (rcu_gp_is_expedited() && !rcu_gp_is_normal() && !gp_exp)
VERBOSE_PERFOUT_ERRSTRING("All grace periods expedited, no normal ones to measure!");
VERBOSE_SCALEOUT_ERRSTRING("All grace periods expedited, no normal ones to measure!");
if (rcu_gp_is_normal() && gp_exp)
VERBOSE_PERFOUT_ERRSTRING("All grace periods normal, no expedited ones to measure!");
VERBOSE_SCALEOUT_ERRSTRING("All grace periods normal, no expedited ones to measure!");
if (gp_exp && gp_async)
VERBOSE_PERFOUT_ERRSTRING("No expedited async GPs, so went with async!");
VERBOSE_SCALEOUT_ERRSTRING("No expedited async GPs, so went with async!");
if (torture_cleanup_begin())
return;
@ -499,30 +499,30 @@ rcu_perf_cleanup(void)
if (reader_tasks) {
for (i = 0; i < nrealreaders; i++)
torture_stop_kthread(rcu_perf_reader,
torture_stop_kthread(rcu_scale_reader,
reader_tasks[i]);
kfree(reader_tasks);
}
if (writer_tasks) {
for (i = 0; i < nrealwriters; i++) {
torture_stop_kthread(rcu_perf_writer,
torture_stop_kthread(rcu_scale_writer,
writer_tasks[i]);
if (!writer_n_durations)
continue;
j = writer_n_durations[i];
pr_alert("%s%s writer %d gps: %d\n",
perf_type, PERF_FLAG, i, j);
scale_type, SCALE_FLAG, i, j);
ngps += j;
}
pr_alert("%s%s start: %llu end: %llu duration: %llu gps: %d batches: %ld\n",
perf_type, PERF_FLAG,
t_rcu_perf_writer_started, t_rcu_perf_writer_finished,
t_rcu_perf_writer_finished -
t_rcu_perf_writer_started,
scale_type, SCALE_FLAG,
t_rcu_scale_writer_started, t_rcu_scale_writer_finished,
t_rcu_scale_writer_finished -
t_rcu_scale_writer_started,
ngps,
rcuperf_seq_diff(b_rcu_gp_test_finished,
b_rcu_gp_test_started));
rcuscale_seq_diff(b_rcu_gp_test_finished,
b_rcu_gp_test_started));
for (i = 0; i < nrealwriters; i++) {
if (!writer_durations)
break;
@ -534,7 +534,7 @@ rcu_perf_cleanup(void)
for (j = 0; j <= writer_n_durations[i]; j++) {
wdp = &wdpp[j];
pr_alert("%s%s %4d writer-duration: %5d %llu\n",
perf_type, PERF_FLAG,
scale_type, SCALE_FLAG,
i, j, *wdp);
if (j % 100 == 0)
schedule_timeout_uninterruptible(1);
@ -573,22 +573,22 @@ static int compute_real(int n)
}
/*
* RCU perf shutdown kthread. Just waits to be awakened, then shuts
* RCU scalability shutdown kthread. Just waits to be awakened, then shuts
* down system.
*/
static int
rcu_perf_shutdown(void *arg)
rcu_scale_shutdown(void *arg)
{
wait_event(shutdown_wq,
atomic_read(&n_rcu_perf_writer_finished) >= nrealwriters);
atomic_read(&n_rcu_scale_writer_finished) >= nrealwriters);
smp_mb(); /* Wake before output. */
rcu_perf_cleanup();
rcu_scale_cleanup();
kernel_power_off();
return -EINVAL;
}
/*
* kfree_rcu() performance tests: Start a kfree_rcu() loop on all CPUs for number
* kfree_rcu() scalability tests: Start a kfree_rcu() loop on all CPUs for number
* of iterations and measure total time and number of GP for all iterations to complete.
*/
@ -598,8 +598,8 @@ torture_param(int, kfree_loops, 10, "Number of loops doing kfree_alloc_num alloc
static struct task_struct **kfree_reader_tasks;
static int kfree_nrealthreads;
static atomic_t n_kfree_perf_thread_started;
static atomic_t n_kfree_perf_thread_ended;
static atomic_t n_kfree_scale_thread_started;
static atomic_t n_kfree_scale_thread_ended;
struct kfree_obj {
char kfree_obj[8];
@ -607,7 +607,7 @@ struct kfree_obj {
};
static int
kfree_perf_thread(void *arg)
kfree_scale_thread(void *arg)
{
int i, loop = 0;
long me = (long)arg;
@ -615,13 +615,13 @@ kfree_perf_thread(void *arg)
u64 start_time, end_time;
long long mem_begin, mem_during = 0;
VERBOSE_PERFOUT_STRING("kfree_perf_thread task started");
VERBOSE_SCALEOUT_STRING("kfree_scale_thread task started");
set_cpus_allowed_ptr(current, cpumask_of(me % nr_cpu_ids));
set_user_nice(current, MAX_NICE);
start_time = ktime_get_mono_fast_ns();
if (atomic_inc_return(&n_kfree_perf_thread_started) >= kfree_nrealthreads) {
if (atomic_inc_return(&n_kfree_scale_thread_started) >= kfree_nrealthreads) {
if (gp_exp)
b_rcu_gp_test_started = cur_ops->exp_completed() / 2;
else
@ -646,7 +646,7 @@ kfree_perf_thread(void *arg)
cond_resched();
} while (!torture_must_stop() && ++loop < kfree_loops);
if (atomic_inc_return(&n_kfree_perf_thread_ended) >= kfree_nrealthreads) {
if (atomic_inc_return(&n_kfree_scale_thread_ended) >= kfree_nrealthreads) {
end_time = ktime_get_mono_fast_ns();
if (gp_exp)
@ -656,7 +656,7 @@ kfree_perf_thread(void *arg)
pr_alert("Total time taken by all kfree'ers: %llu ns, loops: %d, batches: %ld, memory footprint: %lldMB\n",
(unsigned long long)(end_time - start_time), kfree_loops,
rcuperf_seq_diff(b_rcu_gp_test_finished, b_rcu_gp_test_started),
rcuscale_seq_diff(b_rcu_gp_test_finished, b_rcu_gp_test_started),
(mem_begin - mem_during) >> (20 - PAGE_SHIFT));
if (shutdown) {
@ -665,12 +665,12 @@ kfree_perf_thread(void *arg)
}
}
torture_kthread_stopping("kfree_perf_thread");
torture_kthread_stopping("kfree_scale_thread");
return 0;
}
static void
kfree_perf_cleanup(void)
kfree_scale_cleanup(void)
{
int i;
@ -679,7 +679,7 @@ kfree_perf_cleanup(void)
if (kfree_reader_tasks) {
for (i = 0; i < kfree_nrealthreads; i++)
torture_stop_kthread(kfree_perf_thread,
torture_stop_kthread(kfree_scale_thread,
kfree_reader_tasks[i]);
kfree(kfree_reader_tasks);
}
@ -691,20 +691,20 @@ kfree_perf_cleanup(void)
* shutdown kthread. Just waits to be awakened, then shuts down system.
*/
static int
kfree_perf_shutdown(void *arg)
kfree_scale_shutdown(void *arg)
{
wait_event(shutdown_wq,
atomic_read(&n_kfree_perf_thread_ended) >= kfree_nrealthreads);
atomic_read(&n_kfree_scale_thread_ended) >= kfree_nrealthreads);
smp_mb(); /* Wake before output. */
kfree_perf_cleanup();
kfree_scale_cleanup();
kernel_power_off();
return -EINVAL;
}
static int __init
kfree_perf_init(void)
kfree_scale_init(void)
{
long i;
int firsterr = 0;
@ -713,7 +713,7 @@ kfree_perf_init(void)
/* Start up the kthreads. */
if (shutdown) {
init_waitqueue_head(&shutdown_wq);
firsterr = torture_create_kthread(kfree_perf_shutdown, NULL,
firsterr = torture_create_kthread(kfree_scale_shutdown, NULL,
shutdown_task);
if (firsterr)
goto unwind;
@ -730,13 +730,13 @@ kfree_perf_init(void)
}
for (i = 0; i < kfree_nrealthreads; i++) {
firsterr = torture_create_kthread(kfree_perf_thread, (void *)i,
firsterr = torture_create_kthread(kfree_scale_thread, (void *)i,
kfree_reader_tasks[i]);
if (firsterr)
goto unwind;
}
while (atomic_read(&n_kfree_perf_thread_started) < kfree_nrealthreads)
while (atomic_read(&n_kfree_scale_thread_started) < kfree_nrealthreads)
schedule_timeout_uninterruptible(1);
torture_init_end();
@ -744,35 +744,35 @@ kfree_perf_init(void)
unwind:
torture_init_end();
kfree_perf_cleanup();
kfree_scale_cleanup();
return firsterr;
}
static int __init
rcu_perf_init(void)
rcu_scale_init(void)
{
long i;
int firsterr = 0;
static struct rcu_perf_ops *perf_ops[] = {
static struct rcu_scale_ops *scale_ops[] = {
&rcu_ops, &srcu_ops, &srcud_ops, &tasks_ops,
};
if (!torture_init_begin(perf_type, verbose))
if (!torture_init_begin(scale_type, verbose))
return -EBUSY;
/* Process args and tell the world that the perf'er is on the job. */
for (i = 0; i < ARRAY_SIZE(perf_ops); i++) {
cur_ops = perf_ops[i];
if (strcmp(perf_type, cur_ops->name) == 0)
/* Process args and announce that the scalability'er is on the job. */
for (i = 0; i < ARRAY_SIZE(scale_ops); i++) {
cur_ops = scale_ops[i];
if (strcmp(scale_type, cur_ops->name) == 0)
break;
}
if (i == ARRAY_SIZE(perf_ops)) {
pr_alert("rcu-perf: invalid perf type: \"%s\"\n", perf_type);
pr_alert("rcu-perf types:");
for (i = 0; i < ARRAY_SIZE(perf_ops); i++)
pr_cont(" %s", perf_ops[i]->name);
if (i == ARRAY_SIZE(scale_ops)) {
pr_alert("rcu-scale: invalid scale type: \"%s\"\n", scale_type);
pr_alert("rcu-scale types:");
for (i = 0; i < ARRAY_SIZE(scale_ops); i++)
pr_cont(" %s", scale_ops[i]->name);
pr_cont("\n");
WARN_ON(!IS_MODULE(CONFIG_RCU_PERF_TEST));
WARN_ON(!IS_MODULE(CONFIG_RCU_SCALE_TEST));
firsterr = -EINVAL;
cur_ops = NULL;
goto unwind;
@ -781,20 +781,20 @@ rcu_perf_init(void)
cur_ops->init();
if (kfree_rcu_test)
return kfree_perf_init();
return kfree_scale_init();
nrealwriters = compute_real(nwriters);
nrealreaders = compute_real(nreaders);
atomic_set(&n_rcu_perf_reader_started, 0);
atomic_set(&n_rcu_perf_writer_started, 0);
atomic_set(&n_rcu_perf_writer_finished, 0);
rcu_perf_print_module_parms(cur_ops, "Start of test");
atomic_set(&n_rcu_scale_reader_started, 0);
atomic_set(&n_rcu_scale_writer_started, 0);
atomic_set(&n_rcu_scale_writer_finished, 0);
rcu_scale_print_module_parms(cur_ops, "Start of test");
/* Start up the kthreads. */
if (shutdown) {
init_waitqueue_head(&shutdown_wq);
firsterr = torture_create_kthread(rcu_perf_shutdown, NULL,
firsterr = torture_create_kthread(rcu_scale_shutdown, NULL,
shutdown_task);
if (firsterr)
goto unwind;
@ -803,17 +803,17 @@ rcu_perf_init(void)
reader_tasks = kcalloc(nrealreaders, sizeof(reader_tasks[0]),
GFP_KERNEL);
if (reader_tasks == NULL) {
VERBOSE_PERFOUT_ERRSTRING("out of memory");
VERBOSE_SCALEOUT_ERRSTRING("out of memory");
firsterr = -ENOMEM;
goto unwind;
}
for (i = 0; i < nrealreaders; i++) {
firsterr = torture_create_kthread(rcu_perf_reader, (void *)i,
firsterr = torture_create_kthread(rcu_scale_reader, (void *)i,
reader_tasks[i]);
if (firsterr)
goto unwind;
}
while (atomic_read(&n_rcu_perf_reader_started) < nrealreaders)
while (atomic_read(&n_rcu_scale_reader_started) < nrealreaders)
schedule_timeout_uninterruptible(1);
writer_tasks = kcalloc(nrealwriters, sizeof(reader_tasks[0]),
GFP_KERNEL);
@ -823,7 +823,7 @@ rcu_perf_init(void)
kcalloc(nrealwriters, sizeof(*writer_n_durations),
GFP_KERNEL);
if (!writer_tasks || !writer_durations || !writer_n_durations) {
VERBOSE_PERFOUT_ERRSTRING("out of memory");
VERBOSE_SCALEOUT_ERRSTRING("out of memory");
firsterr = -ENOMEM;
goto unwind;
}
@ -835,7 +835,7 @@ rcu_perf_init(void)
firsterr = -ENOMEM;
goto unwind;
}
firsterr = torture_create_kthread(rcu_perf_writer, (void *)i,
firsterr = torture_create_kthread(rcu_scale_writer, (void *)i,
writer_tasks[i]);
if (firsterr)
goto unwind;
@ -845,9 +845,9 @@ rcu_perf_init(void)
unwind:
torture_init_end();
rcu_perf_cleanup();
rcu_scale_cleanup();
return firsterr;
}
module_init(rcu_perf_init);
module_exit(rcu_perf_cleanup);
module_init(rcu_scale_init);
module_exit(rcu_scale_cleanup);

6
tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf-ftrace.sh → tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale-ftrace.sh
View File

@ -1,12 +1,12 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0+
#
# Analyze a given results directory for rcuperf performance measurements,
# Analyze a given results directory for rcuscale performance measurements,
# looking for ftrace data. Exits with 0 if data was found, analyzed, and
# printed. Intended to be invoked from kvm-recheck-rcuperf.sh after
# printed. Intended to be invoked from kvm-recheck-rcuscale.sh after
# argument checking.
#
# Usage: kvm-recheck-rcuperf-ftrace.sh resdir
# Usage: kvm-recheck-rcuscale-ftrace.sh resdir
#
# Copyright (C) IBM Corporation, 2016
#

14
tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuperf.sh → tools/testing/selftests/rcutorture/bin/kvm-recheck-rcuscale.sh
View File

@ -1,9 +1,9 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0+
#
# Analyze a given results directory for rcuperf performance measurements.
# Analyze a given results directory for rcuscale scalability measurements.
#
# Usage: kvm-recheck-rcuperf.sh resdir
# Usage: kvm-recheck-rcuscale.sh resdir
#
# Copyright (C) IBM Corporation, 2016
#
@ -20,7 +20,7 @@ fi
PATH=`pwd`/tools/testing/selftests/rcutorture/bin:$PATH; export PATH
. functions.sh
if kvm-recheck-rcuperf-ftrace.sh $i
if kvm-recheck-rcuscale-ftrace.sh $i
then
# ftrace data was successfully analyzed, call it good!
exit 0
@ -30,12 +30,12 @@ configfile=`echo $i | sed -e 's/^.*\///'`
sed -e 's/^\[[^]]*]//' < $i/console.log |
awk '
/-perf: .* gps: .* batches:/ {
/-scale: .* gps: .* batches:/ {
ngps = $9;
nbatches = $11;
}
/-perf: .*writer-duration/ {
/-scale: .*writer-duration/ {
gptimes[++n] = $5 / 1000.;
sum += $5 / 1000.;
}
@ -43,7 +43,7 @@ awk '
END {
newNR = asort(gptimes);
if (newNR <= 0) {
print "No rcuperf records found???"
print "No rcuscale records found???"
exit;
}
pct50 = int(newNR * 50 / 100);
@ -79,5 +79,5 @@ END {
print "99th percentile grace-period duration: " gptimes[pct99];
print "Maximum grace-period duration: " gptimes[newNR];
print "Grace periods: " ngps + 0 " Batches: " nbatches + 0 " Ratio: " ngps / nbatches;
print "Computed from rcuperf printk output.";
print "Computed from rcuscale printk output.";
}'

8
tools/testing/selftests/rcutorture/bin/kvm.sh
View File

@ -65,7 +65,7 @@ usage () {
echo " --qemu-args qemu-arguments"
echo " --qemu-cmd qemu-system-..."
echo " --results absolute-pathname"
echo " --torture rcu"
echo " --torture lock|rcu|rcuscale|refscale|scf"
echo " --trust-make"
exit 1
}
@ -184,13 +184,13 @@ do
shift
;;
--torture)
checkarg --torture "(suite name)" "$#" "$2" '^\(lock\|rcu\|rcuperf\|refscale\|scf\)$' '^--'
checkarg --torture "(suite name)" "$#" "$2" '^\(lock\|rcu\|rcuscale\|refscale\|scf\)$' '^--'
TORTURE_SUITE=$2
shift
if test "$TORTURE_SUITE" = rcuperf || test "$TORTURE_SUITE" = refscale
if test "$TORTURE_SUITE" = rcuscale || test "$TORTURE_SUITE" = refscale
then
# If you really want jitter for refscale or
# rcuperf, specify it after specifying the rcuperf
# rcuscale, specify it after specifying the rcuscale
# or the refscale. (But why jitter in these cases?)
jitter=0
fi

4
tools/testing/selftests/rcutorture/bin/parse-console.sh
View File

@ -33,8 +33,8 @@ then
fi
cat /dev/null > $file.diags
# Check for proper termination, except for rcuperf and refscale.
if test "$TORTURE_SUITE" != rcuperf && test "$TORTURE_SUITE" != refscale
# Check for proper termination, except for rcuscale and refscale.
if test "$TORTURE_SUITE" != rcuscale && test "$TORTURE_SUITE" != refscale
then
# check for abject failure

2
tools/testing/selftests/rcutorture/configs/rcuperf/CFcommon
View File

@ -1,2 +0,0 @@
CONFIG_RCU_PERF_TEST=y
CONFIG_PRINTK_TIME=y

0
tools/testing/selftests/rcutorture/configs/rcuperf/CFLIST → tools/testing/selftests/rcutorture/configs/rcuscale/CFLIST
View File

2
tools/testing/selftests/rcutorture/configs/rcuscale/CFcommon Normal file
View File

@ -0,0 +1,2 @@
CONFIG_RCU_SCALE_TEST=y
CONFIG_PRINTK_TIME=y

0
tools/testing/selftests/rcutorture/configs/rcuperf/TINY → tools/testing/selftests/rcutorture/configs/rcuscale/TINY
View File

0
tools/testing/selftests/rcutorture/configs/rcuperf/TREE → tools/testing/selftests/rcutorture/configs/rcuscale/TREE
View File

0
tools/testing/selftests/rcutorture/configs/rcuperf/TREE54 → tools/testing/selftests/rcutorture/configs/rcuscale/TREE54
View File

4
tools/testing/selftests/rcutorture/configs/rcuperf/ver_functions.sh → tools/testing/selftests/rcutorture/configs/rcuscale/ver_functions.sh
View File

@ -11,6 +11,6 @@
#
# Adds per-version torture-module parameters to kernels supporting them.
per_version_boot_params () {
echo $1 rcuperf.shutdown=1 \
rcuperf.verbose=1
echo $1 rcuscale.shutdown=1 \
rcuscale.verbose=1
}