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Commit d964f09a authored by Andrii Nakryiko's avatar Andrii Nakryiko
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Merge branch 'New benchmark for hashmap lookups' 

Anton Protopopov says:

====================

Add a new benchmark for hashmap lookups and fix several typos.

In commit 3 I've patched the bench utility so that now command line options
can be reused by different benchmarks.

The benchmark itself is added in the last commit 7. I was using this benchmark
to test map lookup productivity when using a different hash function [1]. When
run with --quiet, the results can be easily plotted [2].  The results provided
by the benchmark look reasonable and match the results of my different
benchmarks (requiring to patch kernel to get actual statistics on map lookups).

Links:
  [1] https://fosdem.org/2023/schedule/event/bpf_hashing/
  [2] https://github.com/aspsk/bpf-bench/tree/master/hashmap-bench

Changes,
v1->v2:
- percpu_times_index[] is of wrong size (Martin)
- use base 0 for strtol (Andrii)
- just use -q without argument (Andrii)
- use less hacks when parsing arguments (Andrii)
====================
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
parents 3538a0fb f371f2dc
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Showing with 420 additions and 32 deletions
tools/testing/selftests/bpf/Makefile
View file @ d964f09a
......@@ -638,6 +638,7 @@ $(OUTPUT)/bench_strncmp.o: $(OUTPUT)/strncmp_bench.skel.h
$(OUTPUT)/bench_bpf_hashmap_full_update.o: $(OUTPUT)/bpf_hashmap_full_update_bench.skel.h
$(OUTPUT)/bench_local_storage.o: $(OUTPUT)/local_storage_bench.skel.h
$(OUTPUT)/bench_local_storage_rcu_tasks_trace.o: $(OUTPUT)/local_storage_rcu_tasks_trace_bench.skel.h
$(OUTPUT)/bench_bpf_hashmap_lookup.o: $(OUTPUT)/bpf_hashmap_lookup.skel.h
$(OUTPUT)/bench.o: bench.h testing_helpers.h $(BPFOBJ)
$(OUTPUT)/bench: LDLIBS += -lm
$(OUTPUT)/bench: $(OUTPUT)/bench.o \
......@@ -652,7 +653,9 @@ $(OUTPUT)/bench: $(OUTPUT)/bench.o \
$(OUTPUT)/bench_strncmp.o \
$(OUTPUT)/bench_bpf_hashmap_full_update.o \
$(OUTPUT)/bench_local_storage.o \
$(OUTPUT)/bench_local_storage_rcu_tasks_trace.o
$(OUTPUT)/bench_local_storage_rcu_tasks_trace.o \
$(OUTPUT)/bench_bpf_hashmap_lookup.o \
#
$(call msg,BINARY,,$@)
$(Q)$(CC) $(CFLAGS) $(LDFLAGS) $(filter %.a %.o,$^) $(LDLIBS) -o $@
......
tools/testing/selftests/bpf/bench.c
View file @ d964f09a
......@@ -16,6 +16,7 @@ struct env env = {
.warmup_sec = 1,
.duration_sec = 5,
.affinity = false,
.quiet = false,
.consumer_cnt = 1,
.producer_cnt = 1,
};
......@@ -262,6 +263,7 @@ static const struct argp_option opts[] = {
{ "consumers", 'c', "NUM", 0, "Number of consumer threads"},
{ "verbose", 'v', NULL, 0, "Verbose debug output"},
{ "affinity", 'a', NULL, 0, "Set consumer/producer thread affinity"},
{ "quiet", 'q', NULL, 0, "Be more quiet"},
{ "prod-affinity", ARG_PROD_AFFINITY_SET, "CPUSET", 0,
"Set of CPUs for producer threads; implies --affinity"},
{ "cons-affinity", ARG_CONS_AFFINITY_SET, "CPUSET", 0,
......@@ -275,6 +277,7 @@ extern struct argp bench_bpf_loop_argp;
extern struct argp bench_local_storage_argp;
extern struct argp bench_local_storage_rcu_tasks_trace_argp;
extern struct argp bench_strncmp_argp;
extern struct argp bench_hashmap_lookup_argp;
static const struct argp_child bench_parsers[] = {
{ &bench_ringbufs_argp, 0, "Ring buffers benchmark", 0 },
......@@ -284,13 +287,15 @@ static const struct argp_child bench_parsers[] = {
{ &bench_strncmp_argp, 0, "bpf_strncmp helper benchmark", 0 },
{ &bench_local_storage_rcu_tasks_trace_argp, 0,
"local_storage RCU Tasks Trace slowdown benchmark", 0 },
{ &bench_hashmap_lookup_argp, 0, "Hashmap lookup benchmark", 0 },
{},
};
/* Make pos_args global, so that we can run argp_parse twice, if necessary */
static int pos_args;
static error_t parse_arg(int key, char *arg, struct argp_state *state)
{
static int pos_args;
switch (key) {
case 'v':
env.verbose = true;
......@@ -329,6 +334,9 @@ static error_t parse_arg(int key, char *arg, struct argp_state *state)
case 'a':
env.affinity = true;
break;
case 'q':
env.quiet = true;
break;
case ARG_PROD_AFFINITY_SET:
env.affinity = true;
if (parse_num_list(arg, &env.prod_cpus.cpus,
......@@ -359,7 +367,7 @@ static error_t parse_arg(int key, char *arg, struct argp_state *state)
return 0;
}
static void parse_cmdline_args(int argc, char **argv)
static void parse_cmdline_args_init(int argc, char **argv)
{
static const struct argp argp = {
.options = opts,
......@@ -369,9 +377,25 @@ static void parse_cmdline_args(int argc, char **argv)
};
if (argp_parse(&argp, argc, argv, 0, NULL, NULL))
exit(1);
if (!env.list && !env.bench_name) {
argp_help(&argp, stderr, ARGP_HELP_DOC, "bench");
exit(1);
}
static void parse_cmdline_args_final(int argc, char **argv)
{
struct argp_child bench_parsers[2] = {};
const struct argp argp = {
.options = opts,
.parser = parse_arg,
.doc = argp_program_doc,
.children = bench_parsers,
};
/* Parse arguments the second time with the correct set of parsers */
if (bench->argp) {
bench_parsers[0].argp = bench->argp;
bench_parsers[0].header = bench->name;
pos_args = 0;
if (argp_parse(&argp, argc, argv, 0, NULL, NULL))
exit(1);
}
}
......@@ -490,6 +514,7 @@ extern const struct bench bench_local_storage_cache_seq_get;
extern const struct bench bench_local_storage_cache_interleaved_get;
extern const struct bench bench_local_storage_cache_hashmap_control;
extern const struct bench bench_local_storage_tasks_trace;
extern const struct bench bench_bpf_hashmap_lookup;
static const struct bench *benchs[] = {
&bench_count_global,
......@@ -529,17 +554,17 @@ static const struct bench *benchs[] = {
&bench_local_storage_cache_interleaved_get,
&bench_local_storage_cache_hashmap_control,
&bench_local_storage_tasks_trace,
&bench_bpf_hashmap_lookup,
};
static void setup_benchmark()
static void find_benchmark(void)
{
int i, err;
int i;
if (!env.bench_name) {
fprintf(stderr, "benchmark name is not specified\n");
exit(1);
}
for (i = 0; i < ARRAY_SIZE(benchs); i++) {
if (strcmp(benchs[i]->name, env.bench_name) == 0) {
bench = benchs[i];
......@@ -550,8 +575,14 @@ static void setup_benchmark()
fprintf(stderr, "benchmark '%s' not found\n", env.bench_name);
exit(1);
}
}
printf("Setting up benchmark '%s'...\n", bench->name);
static void setup_benchmark(void)
{
int i, err;
if (!env.quiet)
printf("Setting up benchmark '%s'...\n", bench->name);
state.producers = calloc(env.producer_cnt, sizeof(*state.producers));
state.consumers = calloc(env.consumer_cnt, sizeof(*state.consumers));
......@@ -597,7 +628,8 @@ static void setup_benchmark()
next_cpu(&env.prod_cpus));
}
printf("Benchmark '%s' started.\n", bench->name);
if (!env.quiet)
printf("Benchmark '%s' started.\n", bench->name);
}
static pthread_mutex_t bench_done_mtx = PTHREAD_MUTEX_INITIALIZER;
......@@ -621,7 +653,7 @@ static void collect_measurements(long delta_ns) {
int main(int argc, char **argv)
{
parse_cmdline_args(argc, argv);
parse_cmdline_args_init(argc, argv);
if (env.list) {
int i;
......@@ -633,6 +665,9 @@ int main(int argc, char **argv)
return 0;
}
find_benchmark();
parse_cmdline_args_final(argc, argv);
setup_benchmark();
setup_timer();
......
tools/testing/selftests/bpf/bench.h
View file @ d964f09a
......@@ -24,6 +24,7 @@ struct env {
bool verbose;
bool list;
bool affinity;
bool quiet;
int consumer_cnt;
int producer_cnt;
struct cpu_set prod_cpus;
......@@ -47,6 +48,7 @@ struct bench_res {
struct bench {
const char *name;
const struct argp *argp;
void (*validate)(void);
void (*setup)(void);
void *(*producer_thread)(void *ctx);
......
tools/testing/selftests/bpf/benchs/bench_bloom_filter_map.c
View file @ d964f09a
......@@ -428,6 +428,7 @@ static void *consumer(void *input)
const struct bench bench_bloom_lookup = {
.name = "bloom-lookup",
.argp = &bench_bloom_map_argp,
.validate = validate,
.setup = bloom_lookup_setup,
.producer_thread = producer,
......@@ -439,6 +440,7 @@ const struct bench bench_bloom_lookup = {
const struct bench bench_bloom_update = {
.name = "bloom-update",
.argp = &bench_bloom_map_argp,
.validate = validate,
.setup = bloom_update_setup,
.producer_thread = producer,
......@@ -450,6 +452,7 @@ const struct bench bench_bloom_update = {
const struct bench bench_bloom_false_positive = {
.name = "bloom-false-positive",
.argp = &bench_bloom_map_argp,
.validate = validate,
.setup = false_positive_setup,
.producer_thread = producer,
......@@ -461,6 +464,7 @@ const struct bench bench_bloom_false_positive = {
const struct bench bench_hashmap_without_bloom = {
.name = "hashmap-without-bloom",
.argp = &bench_bloom_map_argp,
.validate = validate,
.setup = hashmap_no_bloom_setup,
.producer_thread = producer,
......@@ -472,6 +476,7 @@ const struct bench bench_hashmap_without_bloom = {
const struct bench bench_hashmap_with_bloom = {
.name = "hashmap-with-bloom",
.argp = &bench_bloom_map_argp,
.validate = validate,
.setup = hashmap_with_bloom_setup,
.producer_thread = producer,
......
tools/testing/selftests/bpf/benchs/bench_bpf_hashmap_full_update.c
View file @ d964f09a
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2022 Bytedance */
#include <argp.h>
#include "bench.h"
#include "bpf_hashmap_full_update_bench.skel.h"
#include "bpf_util.h"
......@@ -68,7 +67,7 @@ static void setup(void)
bpf_map_update_elem(map_fd, &i, &i, BPF_ANY);
}
void hashmap_report_final(struct bench_res res[], int res_cnt)
static void hashmap_report_final(struct bench_res res[], int res_cnt)
{
unsigned int nr_cpus = bpf_num_possible_cpus();
int i;
......@@ -85,7 +84,7 @@ void hashmap_report_final(struct bench_res res[], int res_cnt)
}
const struct bench bench_bpf_hashmap_full_update = {
.name = "bpf-hashmap-ful-update",
.name = "bpf-hashmap-full-update",
.validate = validate,
.setup = setup,
.producer_thread = producer,
......
tools/testing/selftests/bpf/benchs/bench_bpf_hashmap_lookup.c 0 → 100644
View file @ d964f09a
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2023 Isovalent */
#include <sys/random.h>
#include <argp.h>
#include "bench.h"
#include "bpf_hashmap_lookup.skel.h"
#include "bpf_util.h"
/* BPF triggering benchmarks */
static struct ctx {
struct bpf_hashmap_lookup *skel;
} ctx;
/* only available to kernel, so define it here */
#define BPF_MAX_LOOPS (1<<23)
#define MAX_KEY_SIZE 1024 /* the size of the key map */
static struct {
__u32 key_size;
__u32 map_flags;
__u32 max_entries;
__u32 nr_entries;
__u32 nr_loops;
} args = {
.key_size = 4,
.map_flags = 0,
.max_entries = 1000,
.nr_entries = 500,
.nr_loops = 1000000,
};
enum {
ARG_KEY_SIZE = 8001,
ARG_MAP_FLAGS,
ARG_MAX_ENTRIES,
ARG_NR_ENTRIES,
ARG_NR_LOOPS,
};
static const struct argp_option opts[] = {
{ "key_size", ARG_KEY_SIZE, "KEY_SIZE", 0,
"The hashmap key size (max 1024)"},
{ "map_flags", ARG_MAP_FLAGS, "MAP_FLAGS", 0,
"The hashmap flags passed to BPF_MAP_CREATE"},
{ "max_entries", ARG_MAX_ENTRIES, "MAX_ENTRIES", 0,
"The hashmap max entries"},
{ "nr_entries", ARG_NR_ENTRIES, "NR_ENTRIES", 0,
"The number of entries to insert/lookup"},
{ "nr_loops", ARG_NR_LOOPS, "NR_LOOPS", 0,
"The number of loops for the benchmark"},
{},
};
static error_t parse_arg(int key, char *arg, struct argp_state *state)
{
long ret;
switch (key) {
case ARG_KEY_SIZE:
ret = strtol(arg, NULL, 10);
if (ret < 1 || ret > MAX_KEY_SIZE) {
fprintf(stderr, "invalid key_size");
argp_usage(state);
}
args.key_size = ret;
break;
case ARG_MAP_FLAGS:
ret = strtol(arg, NULL, 0);
if (ret < 0 || ret > UINT_MAX) {
fprintf(stderr, "invalid map_flags");
argp_usage(state);
}
args.map_flags = ret;
break;
case ARG_MAX_ENTRIES:
ret = strtol(arg, NULL, 10);
if (ret < 1 || ret > UINT_MAX) {
fprintf(stderr, "invalid max_entries");
argp_usage(state);
}
args.max_entries = ret;
break;
case ARG_NR_ENTRIES:
ret = strtol(arg, NULL, 10);
if (ret < 1 || ret > UINT_MAX) {
fprintf(stderr, "invalid nr_entries");
argp_usage(state);
}
args.nr_entries = ret;
break;
case ARG_NR_LOOPS:
ret = strtol(arg, NULL, 10);
if (ret < 1 || ret > BPF_MAX_LOOPS) {
fprintf(stderr, "invalid nr_loops: %ld (min=1 max=%u)\n",
ret, BPF_MAX_LOOPS);
argp_usage(state);
}
args.nr_loops = ret;
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
const struct argp bench_hashmap_lookup_argp = {
.options = opts,
.parser = parse_arg,
};
static void validate(void)
{
if (env.consumer_cnt != 1) {
fprintf(stderr, "benchmark doesn't support multi-consumer!\n");
exit(1);
}
if (args.nr_entries > args.max_entries) {
fprintf(stderr, "args.nr_entries is too big! (max %u, got %u)\n",
args.max_entries, args.nr_entries);
exit(1);
}
}
static void *producer(void *input)
{
while (true) {
/* trigger the bpf program */
syscall(__NR_getpgid);
}
return NULL;
}
static void *consumer(void *input)
{
return NULL;
}
static void measure(struct bench_res *res)
{
}
static inline void patch_key(u32 i, u32 *key)
{
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
*key = i + 1;
#else
*key = __builtin_bswap32(i + 1);
#endif
/* the rest of key is random */
}
static void setup(void)
{
struct bpf_link *link;
int map_fd;
int ret;
int i;
setup_libbpf();
ctx.skel = bpf_hashmap_lookup__open();
if (!ctx.skel) {
fprintf(stderr, "failed to open skeleton\n");
exit(1);
}
bpf_map__set_max_entries(ctx.skel->maps.hash_map_bench, args.max_entries);
bpf_map__set_key_size(ctx.skel->maps.hash_map_bench, args.key_size);
bpf_map__set_value_size(ctx.skel->maps.hash_map_bench, 8);
bpf_map__set_map_flags(ctx.skel->maps.hash_map_bench, args.map_flags);
ctx.skel->bss->nr_entries = args.nr_entries;
ctx.skel->bss->nr_loops = args.nr_loops / args.nr_entries;
if (args.key_size > 4) {
for (i = 1; i < args.key_size/4; i++)
ctx.skel->bss->key[i] = 2654435761 * i;
}
ret = bpf_hashmap_lookup__load(ctx.skel);
if (ret) {
bpf_hashmap_lookup__destroy(ctx.skel);
fprintf(stderr, "failed to load map: %s", strerror(-ret));
exit(1);
}
/* fill in the hash_map */
map_fd = bpf_map__fd(ctx.skel->maps.hash_map_bench);
for (u64 i = 0; i < args.nr_entries; i++) {
patch_key(i, ctx.skel->bss->key);
bpf_map_update_elem(map_fd, ctx.skel->bss->key, &i, BPF_ANY);
}
link = bpf_program__attach(ctx.skel->progs.benchmark);
if (!link) {
fprintf(stderr, "failed to attach program!\n");
exit(1);
}
}
static inline double events_from_time(u64 time)
{
if (time)
return args.nr_loops * 1000000000llu / time / 1000000.0L;
return 0;
}
static int compute_events(u64 *times, double *events_mean, double *events_stddev, u64 *mean_time)
{
int i, n = 0;
*events_mean = 0;
*events_stddev = 0;
*mean_time = 0;
for (i = 0; i < 32; i++) {
if (!times[i])
break;
*mean_time += times[i];
*events_mean += events_from_time(times[i]);
n += 1;
}
if (!n)
return 0;
*mean_time /= n;
*events_mean /= n;
if (n > 1) {
for (i = 0; i < n; i++) {
double events_i = *events_mean - events_from_time(times[i]);
*events_stddev += events_i * events_i / (n - 1);
}
*events_stddev = sqrt(*events_stddev);
}
return n;
}
static void hashmap_report_final(struct bench_res res[], int res_cnt)
{
unsigned int nr_cpus = bpf_num_possible_cpus();
double events_mean, events_stddev;
u64 mean_time;
int i, n;
for (i = 0; i < nr_cpus; i++) {
n = compute_events(ctx.skel->bss->percpu_times[i], &events_mean,
&events_stddev, &mean_time);
if (n == 0)
continue;
if (env.quiet) {
/* we expect only one cpu to be present */
if (env.affinity)
printf("%.3lf\n", events_mean);
else
printf("cpu%02d %.3lf\n", i, events_mean);
} else {
printf("cpu%02d: lookup %.3lfM ± %.3lfM events/sec"
" (approximated from %d samples of ~%lums)\n",
i, events_mean, 2*events_stddev,
n, mean_time / 1000000);
}
}
}
const struct bench bench_bpf_hashmap_lookup = {
.name = "bpf-hashmap-lookup",
.argp = &bench_hashmap_lookup_argp,
.validate = validate,
.setup = setup,
.producer_thread = producer,
.consumer_thread = consumer,
.measure = measure,
.report_progress = NULL,
.report_final = hashmap_report_final,
};
tools/testing/selftests/bpf/benchs/bench_bpf_loop.c
View file @ d964f09a
......@@ -95,6 +95,7 @@ static void setup(void)
const struct bench bench_bpf_loop = {
.name = "bpf-loop",
.argp = &bench_bpf_loop_argp,
.validate = validate,
.setup = setup,
.producer_thread = producer,
......
tools/testing/selftests/bpf/benchs/bench_local_storage.c
View file @ d964f09a
......@@ -255,6 +255,7 @@ static void *producer(void *input)
*/
const struct bench bench_local_storage_cache_seq_get = {
.name = "local-storage-cache-seq-get",
.argp = &bench_local_storage_argp,
.validate = validate,
.setup = local_storage_cache_get_setup,
.producer_thread = producer,
......@@ -266,6 +267,7 @@ const struct bench bench_local_storage_cache_seq_get = {
const struct bench bench_local_storage_cache_interleaved_get = {
.name = "local-storage-cache-int-get",
.argp = &bench_local_storage_argp,
.validate = validate,
.setup = local_storage_cache_get_interleaved_setup,
.producer_thread = producer,
......@@ -277,6 +279,7 @@ const struct bench bench_local_storage_cache_interleaved_get = {
const struct bench bench_local_storage_cache_hashmap_control = {
.name = "local-storage-cache-hashmap-control",
.argp = &bench_local_storage_argp,
.validate = validate,
.setup = hashmap_setup,
.producer_thread = producer,
......
tools/testing/selftests/bpf/benchs/bench_local_storage_rcu_tasks_trace.c
View file @ d964f09a
......@@ -12,17 +12,14 @@
static struct {
__u32 nr_procs;
__u32 kthread_pid;
bool quiet;
} args = {
.nr_procs = 1000,
.kthread_pid = 0,
.quiet = false,
};
enum {
ARG_NR_PROCS = 7000,
ARG_KTHREAD_PID = 7001,
ARG_QUIET = 7002,
};
static const struct argp_option opts[] = {
......@@ -30,8 +27,6 @@ static const struct argp_option opts[] = {
"Set number of user processes to spin up"},
{ "kthread_pid", ARG_KTHREAD_PID, "PID", 0,
"Pid of rcu_tasks_trace kthread for ticks tracking"},
{ "quiet", ARG_QUIET, "{0,1}", 0,
"If true, don't report progress"},
{},
};
......@@ -56,14 +51,6 @@ static error_t parse_arg(int key, char *arg, struct argp_state *state)
}
args.kthread_pid = ret;
break;
case ARG_QUIET:
ret = strtol(arg, NULL, 10);
if (ret < 0 || ret > 1) {
fprintf(stderr, "invalid quiet %ld\n", ret);
argp_usage(state);
}
args.quiet = ret;
break;
break;
default:
return ARGP_ERR_UNKNOWN;
......@@ -230,7 +217,7 @@ static void report_progress(int iter, struct bench_res *res, long delta_ns)
exit(1);
}
if (args.quiet)
if (env.quiet)
return;
printf("Iter %d\t avg tasks_trace grace period latency\t%lf ns\n",
......@@ -271,6 +258,7 @@ static void report_final(struct bench_res res[], int res_cnt)
*/
const struct bench bench_local_storage_tasks_trace = {
.name = "local-storage-tasks-trace",
.argp = &bench_local_storage_rcu_tasks_trace_argp,
.validate = validate,
.setup = local_storage_tasks_trace_setup,
.producer_thread = producer,
......
tools/testing/selftests/bpf/benchs/bench_ringbufs.c
View file @ d964f09a
......@@ -518,6 +518,7 @@ static void *perfbuf_custom_consumer(void *input)
const struct bench bench_rb_libbpf = {
.name = "rb-libbpf",
.argp = &bench_ringbufs_argp,
.validate = bufs_validate,
.setup = ringbuf_libbpf_setup,
.producer_thread = bufs_sample_producer,
......@@ -529,6 +530,7 @@ const struct bench bench_rb_libbpf = {
const struct bench bench_rb_custom = {
.name = "rb-custom",
.argp = &bench_ringbufs_argp,
.validate = bufs_validate,
.setup = ringbuf_custom_setup,
.producer_thread = bufs_sample_producer,
......@@ -540,6 +542,7 @@ const struct bench bench_rb_custom = {
const struct bench bench_pb_libbpf = {
.name = "pb-libbpf",
.argp = &bench_ringbufs_argp,
.validate = bufs_validate,
.setup = perfbuf_libbpf_setup,
.producer_thread = bufs_sample_producer,
......@@ -551,6 +554,7 @@ const struct bench bench_pb_libbpf = {
const struct bench bench_pb_custom = {
.name = "pb-custom",
.argp = &bench_ringbufs_argp,
.validate = bufs_validate,
.setup = perfbuf_libbpf_setup,
.producer_thread = bufs_sample_producer,
......
tools/testing/selftests/bpf/benchs/bench_strncmp.c
View file @ d964f09a
......@@ -140,6 +140,7 @@ static void strncmp_measure(struct bench_res *res)
const struct bench bench_strncmp_no_helper = {
.name = "strncmp-no-helper",
.argp = &bench_strncmp_argp,
.validate = strncmp_validate,
.setup = strncmp_no_helper_setup,
.producer_thread = strncmp_producer,
......@@ -151,6 +152,7 @@ const struct bench bench_strncmp_no_helper = {
const struct bench bench_strncmp_helper = {
.name = "strncmp-helper",
.argp = &bench_strncmp_argp,
.validate = strncmp_validate,
.setup = strncmp_helper_setup,
.producer_thread = strncmp_producer,
......
tools/testing/selftests/bpf/benchs/run_bench_bpf_hashmap_full_update.sh
View file @ d964f09a
......@@ -6,6 +6,6 @@ source ./benchs/run_common.sh
set -eufo pipefail
nr_threads=`expr $(cat /proc/cpuinfo | grep "processor"| wc -l) - 1`
summary=$($RUN_BENCH -p $nr_threads bpf-hashmap-ful-update)
summary=$($RUN_BENCH -p $nr_threads bpf-hashmap-full-update)
printf "$summary"
printf "\n"
tools/testing/selftests/bpf/benchs/run_bench_local_storage_rcu_tasks_trace.sh
View file @ d964f09a
......@@ -8,4 +8,4 @@ if [ -z $kthread_pid ]; then
exit 1
fi
./bench --nr_procs 15000 --kthread_pid $kthread_pid -d 600 --quiet 1 local-storage-tasks-trace
./bench --nr_procs 15000 --kthread_pid $kthread_pid -d 600 --quiet local-storage-tasks-trace
tools/testing/selftests/bpf/progs/bpf_hashmap_lookup.c 0 → 100644
View file @ d964f09a
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2023 Isovalent */
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"
char _license[] SEC("license") = "GPL";
struct {
__uint(type, BPF_MAP_TYPE_HASH);
} hash_map_bench SEC(".maps");
/* The number of slots to store times */
#define NR_SLOTS 32
#define NR_CPUS 256
#define CPU_MASK (NR_CPUS-1)
/* Configured by userspace */
u64 nr_entries;
u64 nr_loops;
u32 __attribute__((__aligned__(8))) key[NR_CPUS];
/* Filled by us */
u64 __attribute__((__aligned__(256))) percpu_times_index[NR_CPUS];
u64 __attribute__((__aligned__(256))) percpu_times[NR_CPUS][NR_SLOTS];
static inline void patch_key(u32 i)
{
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
key[0] = i + 1;
#else
key[0] = __builtin_bswap32(i + 1);
#endif
/* the rest of key is random and is configured by userspace */
}
static int lookup_callback(__u32 index, u32 *unused)
{
patch_key(index);
return bpf_map_lookup_elem(&hash_map_bench, key) ? 0 : 1;
}
static int loop_lookup_callback(__u32 index, u32 *unused)
{
return bpf_loop(nr_entries, lookup_callback, NULL, 0) ? 0 : 1;
}
SEC("fentry/" SYS_PREFIX "sys_getpgid")
int benchmark(void *ctx)
{
u32 cpu = bpf_get_smp_processor_id();
u32 times_index;
u64 start_time;
times_index = percpu_times_index[cpu & CPU_MASK] % NR_SLOTS;
start_time = bpf_ktime_get_ns();
bpf_loop(nr_loops, loop_lookup_callback, NULL, 0);
percpu_times[cpu & CPU_MASK][times_index] = bpf_ktime_get_ns() - start_time;
percpu_times_index[cpu & CPU_MASK] += 1;
return 0;
}
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