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authorKay Sievers <kay@vrfy.org>2013-06-04 20:55:00 +0200
committerKay Sievers <kay@vrfy.org>2013-06-04 21:00:30 +0200
commit311754514cd24210f9c72e0af5173d7895690e5f (patch)
tree0b7bdd8160a0ced9c94b1e2a503e9bcf7346f324 /src/libsystemd-bus/test-bus-kernel-benchmark.c
parent3a256a12ad2f5b635d852d2b7068b1de30f8cf59 (diff)
bus-benchmark: add performance data output mode
- for now, comment out munmap() check to enable memfd passing - print tab-separated values and header - add memcpy() to fill the memfd, to produce real-world results $ ./test-bus-kernel-benchmark SIZE COPY MEMFD 4194304 370 370 2097152 810 810 1048576 2130 2130 524288 4090 4090 262144 7080 7080 131072 11380 11380 65536 17140 17140 98304 13930 13930 114688 12890 12890 122880 12350 12350 126976 12150 12150 129024 12170 12170 130048 12040 12040 130560 12080 12080 130816 12010 12010 130944 12020 12020 131008 12040 12040 131040 12050 12050 131056 12010 12010 131064 12060 12060 131068 12040 12040 131070 11310 11310 131069 11420 11420 Copying/memfd are equally fast at 131068 bytes $ ./test-bus-kernel-benchmark chart SIZE COPY MEMFD 1 35570 23690 2 36470 23680 4 36160 23520 8 36600 22220 16 33900 20830 32 33990 21360 64 33480 21280 128 34050 20910 256 32950 21750 512 34730 21900 1024 33810 22890 2048 36280 23110 4096 30790 21610 8192 29380 21100 16384 26880 19820 32768 22510 17980 65536 17270 15180 131072 11400 11420 262144 7140 8270 524288 4090 5050 1048576 2110 2780 2097152 800 1140 4194304 350 580
Diffstat (limited to 'src/libsystemd-bus/test-bus-kernel-benchmark.c')
-rw-r--r--src/libsystemd-bus/test-bus-kernel-benchmark.c110
1 files changed, 91 insertions, 19 deletions
diff --git a/src/libsystemd-bus/test-bus-kernel-benchmark.c b/src/libsystemd-bus/test-bus-kernel-benchmark.c
index e2a872c6c5..2ece2a0029 100644
--- a/src/libsystemd-bus/test-bus-kernel-benchmark.c
+++ b/src/libsystemd-bus/test-bus-kernel-benchmark.c
@@ -32,7 +32,7 @@
#include "bus-kernel.h"
#include "bus-internal.h"
-#define MAX_SIZE (1*1024*1024)
+#define MAX_SIZE (8*1024*1024)
static usec_t arg_loop_usec = 100 * USEC_PER_MSEC;
@@ -74,21 +74,17 @@ static void server(sd_bus *b, size_t *result) {
static void transaction(sd_bus *b, size_t sz) {
_cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
- /* size_t psz, i; */
uint8_t *p;
assert_se(sd_bus_message_new_method_call(b, ":1.1", "/", "benchmark.server", "Work", &m) >= 0);
assert_se(sd_bus_message_append_array_space(m, 'y', sz, (void**) &p) >= 0);
- /* Touch every page */
- /* psz = page_size(); */
- /* for (i = 0; i < sz; i += psz) */
- /* p[i] = 'X'; */
+ memset(p, 0x80, sz);
assert_se(sd_bus_send_with_reply_and_block(b, m, 0, NULL, &reply) >= 0);
}
-static void client(const char *address) {
+static void client_bisect(const char *address) {
_cleanup_bus_message_unref_ sd_bus_message *x = NULL;
size_t lsize, rsize, csize;
sd_bus *b;
@@ -108,21 +104,22 @@ static void client(const char *address) {
lsize = 1;
rsize = MAX_SIZE;
+ printf("SIZE\tCOPY\tMEMFD\n");
+
for (;;) {
usec_t t;
unsigned n_copying, n_memfd;
csize = (lsize + rsize) / 2;
- log_info("Trying size=%zu", csize);
-
if (csize <= lsize)
break;
if (csize <= 0)
break;
- log_info("copying...");
+ fprintf(stderr, "%zu\t", csize);
+
b->use_memfd = 0;
t = now(CLOCK_MONOTONIC);
@@ -131,10 +128,8 @@ static void client(const char *address) {
if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
break;
}
+ printf("%u\t", (unsigned) ((n_copying * USEC_PER_SEC) / arg_loop_usec));
- log_info("%u copy transactions per second", (unsigned) ((n_copying * USEC_PER_SEC) / arg_loop_usec));
-
- log_info("sending memfd...");
b->use_memfd = -1;
t = now(CLOCK_MONOTONIC);
@@ -143,8 +138,7 @@ static void client(const char *address) {
if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
break;
}
-
- log_info("%u memfd transactions per second", (unsigned) ((n_memfd * USEC_PER_SEC) / arg_loop_usec));
+ printf("%u\n", (unsigned) ((n_copying * USEC_PER_SEC) / arg_loop_usec));
if (n_copying == n_memfd)
break;
@@ -155,6 +149,63 @@ static void client(const char *address) {
rsize = csize;
}
+ b->use_memfd = 1;
+ assert_se(sd_bus_message_new_method_call(b, ":1.1", "/", "benchmark.server", "Exit", &x) >= 0);
+ assert_se(sd_bus_message_append(x, "t", csize) >= 0);
+ assert_se(sd_bus_send(b, x, NULL) >= 0);
+
+ sd_bus_unref(b);
+}
+
+static void client_chart(const char *address) {
+ _cleanup_bus_message_unref_ sd_bus_message *x = NULL;
+ size_t csize;
+ sd_bus *b;
+ int r;
+
+ r = sd_bus_new(&b);
+ assert_se(r >= 0);
+
+ r = sd_bus_set_address(b, address);
+ assert_se(r >= 0);
+
+ r = sd_bus_start(b);
+ assert_se(r >= 0);
+
+ assert_se(sd_bus_call_method(b, ":1.1", "/", "benchmark.server", "Ping", NULL, NULL, NULL) >= 0);
+
+ printf("SIZE\tCOPY\tMEMFD\n");
+
+ for (csize = 1; csize < MAX_SIZE; csize *= 2) {
+ usec_t t;
+ unsigned n_copying, n_memfd;
+
+ fprintf(stderr, "%zu\t", csize);
+
+ b->use_memfd = 0;
+
+ t = now(CLOCK_MONOTONIC);
+ for (n_copying = 0;; n_copying++) {
+ transaction(b, csize);
+ if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
+ break;
+ }
+
+ printf("%u\t", (unsigned) ((n_copying * USEC_PER_SEC) / arg_loop_usec));
+
+ b->use_memfd = -1;
+
+ t = now(CLOCK_MONOTONIC);
+ for (n_memfd = 0;; n_memfd++) {
+ transaction(b, csize);
+ if (now(CLOCK_MONOTONIC) >= t + arg_loop_usec)
+ break;
+ }
+
+ printf("%u\n", (unsigned) ((n_memfd * USEC_PER_SEC) / arg_loop_usec));
+ }
+
+ b->use_memfd = 1;
assert_se(sd_bus_message_new_method_call(b, ":1.1", "/", "benchmark.server", "Exit", &x) >= 0);
assert_se(sd_bus_message_append(x, "t", csize) >= 0);
assert_se(sd_bus_send(b, x, NULL) >= 0);
@@ -163,6 +214,11 @@ static void client(const char *address) {
}
int main(int argc, char *argv[]) {
+ enum {
+ MODE_BISECT,
+ MODE_CHART,
+ } mode = MODE_BISECT;
+ int i;
_cleanup_free_ char *bus_name = NULL, *address = NULL;
_cleanup_close_ int bus_ref = -1;
cpu_set_t cpuset;
@@ -173,8 +229,14 @@ int main(int argc, char *argv[]) {
log_set_max_level(LOG_DEBUG);
- if (argc > 1)
- assert_se(parse_sec(argv[1], &arg_loop_usec) >= 0);
+ for (i = 1; i < argc; i++) {
+ if (streq(argv[i], "chart")) {
+ mode = MODE_CHART;
+ continue;
+ }
+
+ assert_se(parse_sec(argv[i], &arg_loop_usec) >= 0);
+ }
assert_se(arg_loop_usec > 0);
@@ -210,7 +272,16 @@ int main(int argc, char *argv[]) {
close_nointr_nofail(bus_ref);
sd_bus_unref(b);
- client(address);
+ switch (mode) {
+ case MODE_BISECT:
+ client_bisect(address);
+ break;
+
+ case MODE_CHART:
+ client_chart(address);
+ break;
+ }
+
_exit(0);
}
@@ -220,7 +291,8 @@ int main(int argc, char *argv[]) {
server(b, &result);
- log_info("Copying/memfd are equally fast at %zu", result);
+ if (mode == MODE_BISECT)
+ printf("Copying/memfd are equally fast at %zu bytes\n", result);
assert_se(waitpid(pid, NULL, 0) == pid);