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-rw-r--r--tools/testing/selftests/net/txtimestamp.c (renamed from tools/testing/selftests/networking/timestamping/txtimestamp.c)193
1 files changed, 169 insertions, 24 deletions
diff --git a/tools/testing/selftests/networking/timestamping/txtimestamp.c b/tools/testing/selftests/net/txtimestamp.c
index 7e386be47120..10f2fde3686b 100644
--- a/tools/testing/selftests/networking/timestamping/txtimestamp.c
+++ b/tools/testing/selftests/net/txtimestamp.c
@@ -26,6 +26,7 @@
#include <inttypes.h>
#include <linux/errqueue.h>
#include <linux/if_ether.h>
+#include <linux/if_packet.h>
#include <linux/ipv6.h>
#include <linux/net_tstamp.h>
#include <netdb.h>
@@ -34,13 +35,13 @@
#include <netinet/ip.h>
#include <netinet/udp.h>
#include <netinet/tcp.h>
-#include <netpacket/packet.h>
#include <poll.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/epoll.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/socket.h>
@@ -49,6 +50,10 @@
#include <time.h>
#include <unistd.h>
+#define NSEC_PER_USEC 1000L
+#define USEC_PER_SEC 1000000L
+#define NSEC_PER_SEC 1000000000LL
+
/* command line parameters */
static int cfg_proto = SOCK_STREAM;
static int cfg_ipproto = IPPROTO_TCP;
@@ -59,14 +64,19 @@ static int cfg_payload_len = 10;
static int cfg_poll_timeout = 100;
static int cfg_delay_snd;
static int cfg_delay_ack;
+static int cfg_delay_tolerance_usec = 500;
static bool cfg_show_payload;
static bool cfg_do_pktinfo;
+static bool cfg_busy_poll;
+static int cfg_sleep_usec = 50 * 1000;
static bool cfg_loop_nodata;
-static bool cfg_no_delay;
static bool cfg_use_cmsg;
static bool cfg_use_pf_packet;
+static bool cfg_use_epoll;
+static bool cfg_epollet;
static bool cfg_do_listen;
static uint16_t dest_port = 9000;
+static bool cfg_print_nsec;
static struct sockaddr_in daddr;
static struct sockaddr_in6 daddr6;
@@ -75,11 +85,48 @@ static struct timespec ts_usr;
static int saved_tskey = -1;
static int saved_tskey_type = -1;
+struct timing_event {
+ int64_t min;
+ int64_t max;
+ int64_t total;
+ int count;
+};
+
+static struct timing_event usr_enq;
+static struct timing_event usr_snd;
+static struct timing_event usr_ack;
+
static bool test_failed;
+static int64_t timespec_to_ns64(struct timespec *ts)
+{
+ return ts->tv_sec * NSEC_PER_SEC + ts->tv_nsec;
+}
+
static int64_t timespec_to_us64(struct timespec *ts)
{
- return ts->tv_sec * 1000 * 1000 + ts->tv_nsec / 1000;
+ return ts->tv_sec * USEC_PER_SEC + ts->tv_nsec / NSEC_PER_USEC;
+}
+
+static void init_timing_event(struct timing_event *te)
+{
+ te->min = INT64_MAX;
+ te->max = 0;
+ te->total = 0;
+ te->count = 0;
+}
+
+static void add_timing_event(struct timing_event *te,
+ struct timespec *t_start, struct timespec *t_end)
+{
+ int64_t ts_delta = timespec_to_ns64(t_end) - timespec_to_ns64(t_start);
+
+ te->count++;
+ if (ts_delta < te->min)
+ te->min = ts_delta;
+ if (ts_delta > te->max)
+ te->max = ts_delta;
+ te->total += ts_delta;
}
static void validate_key(int tskey, int tstype)
@@ -106,32 +153,51 @@ static void validate_key(int tskey, int tstype)
static void validate_timestamp(struct timespec *cur, int min_delay)
{
- int max_delay = min_delay + 500 /* processing time upper bound */;
int64_t cur64, start64;
+ int max_delay;
cur64 = timespec_to_us64(cur);
start64 = timespec_to_us64(&ts_usr);
+ max_delay = min_delay + cfg_delay_tolerance_usec;
if (cur64 < start64 + min_delay || cur64 > start64 + max_delay) {
- fprintf(stderr, "ERROR: delay %lu expected between %d and %d\n",
+ fprintf(stderr, "ERROR: %" PRId64 " us expected between %d and %d\n",
cur64 - start64, min_delay, max_delay);
test_failed = true;
}
}
+static void __print_ts_delta_formatted(int64_t ts_delta)
+{
+ if (cfg_print_nsec)
+ fprintf(stderr, "%" PRId64 " ns", ts_delta);
+ else
+ fprintf(stderr, "%" PRId64 " us", ts_delta / NSEC_PER_USEC);
+}
+
static void __print_timestamp(const char *name, struct timespec *cur,
uint32_t key, int payload_len)
{
+ int64_t ts_delta;
+
if (!(cur->tv_sec | cur->tv_nsec))
return;
- fprintf(stderr, " %s: %lu s %lu us (seq=%u, len=%u)",
- name, cur->tv_sec, cur->tv_nsec / 1000,
- key, payload_len);
-
- if (cur != &ts_usr)
- fprintf(stderr, " (USR %+" PRId64 " us)",
- timespec_to_us64(cur) - timespec_to_us64(&ts_usr));
+ if (cfg_print_nsec)
+ fprintf(stderr, " %s: %lu s %lu ns (seq=%u, len=%u)",
+ name, cur->tv_sec, cur->tv_nsec,
+ key, payload_len);
+ else
+ fprintf(stderr, " %s: %lu s %lu us (seq=%u, len=%u)",
+ name, cur->tv_sec, cur->tv_nsec / NSEC_PER_USEC,
+ key, payload_len);
+
+ if (cur != &ts_usr) {
+ ts_delta = timespec_to_ns64(cur) - timespec_to_ns64(&ts_usr);
+ fprintf(stderr, " (USR +");
+ __print_ts_delta_formatted(ts_delta);
+ fprintf(stderr, ")");
+ }
fprintf(stderr, "\n");
}
@@ -155,14 +221,17 @@ static void print_timestamp(struct scm_timestamping *tss, int tstype,
case SCM_TSTAMP_SCHED:
tsname = " ENQ";
validate_timestamp(&tss->ts[0], 0);
+ add_timing_event(&usr_enq, &ts_usr, &tss->ts[0]);
break;
case SCM_TSTAMP_SND:
tsname = " SND";
validate_timestamp(&tss->ts[0], cfg_delay_snd);
+ add_timing_event(&usr_snd, &ts_usr, &tss->ts[0]);
break;
case SCM_TSTAMP_ACK:
tsname = " ACK";
validate_timestamp(&tss->ts[0], cfg_delay_ack);
+ add_timing_event(&usr_ack, &ts_usr, &tss->ts[0]);
break;
default:
error(1, 0, "unknown timestamp type: %u",
@@ -171,6 +240,21 @@ static void print_timestamp(struct scm_timestamping *tss, int tstype,
__print_timestamp(tsname, &tss->ts[0], tskey, payload_len);
}
+static void print_timing_event(char *name, struct timing_event *te)
+{
+ if (!te->count)
+ return;
+
+ fprintf(stderr, " %s: count=%d", name, te->count);
+ fprintf(stderr, ", avg=");
+ __print_ts_delta_formatted((int64_t)(te->total / te->count));
+ fprintf(stderr, ", min=");
+ __print_ts_delta_formatted(te->min);
+ fprintf(stderr, ", max=");
+ __print_ts_delta_formatted(te->max);
+ fprintf(stderr, "\n");
+}
+
/* TODO: convert to check_and_print payload once API is stable */
static void print_payload(char *data, int len)
{
@@ -198,6 +282,17 @@ static void print_pktinfo(int family, int ifindex, void *saddr, void *daddr)
daddr ? inet_ntop(family, daddr, da, sizeof(da)) : "unknown");
}
+static void __epoll(int epfd)
+{
+ struct epoll_event events;
+ int ret;
+
+ memset(&events, 0, sizeof(events));
+ ret = epoll_wait(epfd, &events, 1, cfg_poll_timeout);
+ if (ret != 1)
+ error(1, errno, "epoll_wait");
+}
+
static void __poll(int fd)
{
struct pollfd pollfd;
@@ -391,17 +486,21 @@ static void do_test(int family, unsigned int report_opt)
struct msghdr msg;
struct iovec iov;
char *buf;
- int fd, i, val = 1, total_len;
+ int fd, i, val = 1, total_len, epfd = 0;
+
+ init_timing_event(&usr_enq);
+ init_timing_event(&usr_snd);
+ init_timing_event(&usr_ack);
total_len = cfg_payload_len;
if (cfg_use_pf_packet || cfg_proto == SOCK_RAW) {
total_len += sizeof(struct udphdr);
- if (cfg_use_pf_packet || cfg_ipproto == IPPROTO_RAW)
+ if (cfg_use_pf_packet || cfg_ipproto == IPPROTO_RAW) {
if (family == PF_INET)
total_len += sizeof(struct iphdr);
else
total_len += sizeof(struct ipv6hdr);
-
+ }
/* special case, only rawv6_sendmsg:
* pass proto in sin6_port if not connected
* also see ANK comment in net/ipv4/raw.c
@@ -418,6 +517,20 @@ static void do_test(int family, unsigned int report_opt)
if (fd < 0)
error(1, errno, "socket");
+ if (cfg_use_epoll) {
+ struct epoll_event ev;
+
+ memset(&ev, 0, sizeof(ev));
+ ev.data.fd = fd;
+ if (cfg_epollet)
+ ev.events |= EPOLLET;
+ epfd = epoll_create(1);
+ if (epfd <= 0)
+ error(1, errno, "epoll_create");
+ if (epoll_ctl(epfd, EPOLL_CTL_ADD, fd, &ev))
+ error(1, errno, "epoll_ctl");
+ }
+
/* reset expected key on each new socket */
saved_tskey = -1;
@@ -525,19 +638,28 @@ static void do_test(int family, unsigned int report_opt)
error(1, errno, "send");
/* wait for all errors to be queued, else ACKs arrive OOO */
- if (!cfg_no_delay)
- usleep(50 * 1000);
+ if (cfg_sleep_usec)
+ usleep(cfg_sleep_usec);
- __poll(fd);
+ if (!cfg_busy_poll) {
+ if (cfg_use_epoll)
+ __epoll(epfd);
+ else
+ __poll(fd);
+ }
while (!recv_errmsg(fd)) {}
}
+ print_timing_event("USR-ENQ", &usr_enq);
+ print_timing_event("USR-SND", &usr_snd);
+ print_timing_event("USR-ACK", &usr_ack);
+
if (close(fd))
error(1, errno, "close");
free(buf);
- usleep(100 * 1000);
+ usleep(100 * NSEC_PER_USEC);
}
static void __attribute__((noreturn)) usage(const char *filepath)
@@ -547,18 +669,23 @@ static void __attribute__((noreturn)) usage(const char *filepath)
" -4: only IPv4\n"
" -6: only IPv6\n"
" -h: show this message\n"
+ " -b: busy poll to read from error queue\n"
" -c N: number of packets for each test\n"
" -C: use cmsg to set tstamp recording options\n"
- " -D: no delay between packets\n"
- " -F: poll() waits forever for an event\n"
+ " -e: use level-triggered epoll() instead of poll()\n"
+ " -E: use event-triggered epoll() instead of poll()\n"
+ " -F: poll()/epoll() waits forever for an event\n"
" -I: request PKTINFO\n"
" -l N: send N bytes at a time\n"
" -L listen on hostname and port\n"
" -n: set no-payload option\n"
+ " -N: print timestamps and durations in nsec (instead of usec)\n"
" -p N: connect to port N\n"
" -P: use PF_PACKET\n"
" -r: use raw\n"
" -R: use raw (IP_HDRINCL)\n"
+ " -S N: usec to sleep before reading error queue\n"
+ " -t N: tolerance (usec) for timestamp validation\n"
" -u: use udp\n"
" -v: validate SND delay (usec)\n"
" -V: validate ACK delay (usec)\n"
@@ -572,7 +699,8 @@ static void parse_opt(int argc, char **argv)
int proto_count = 0;
int c;
- while ((c = getopt(argc, argv, "46c:CDFhIl:Lnp:PrRuv:V:x")) != -1) {
+ while ((c = getopt(argc, argv,
+ "46bc:CeEFhIl:LnNp:PrRS:t:uv:V:x")) != -1) {
switch (c) {
case '4':
do_ipv6 = 0;
@@ -580,15 +708,21 @@ static void parse_opt(int argc, char **argv)
case '6':
do_ipv4 = 0;
break;
+ case 'b':
+ cfg_busy_poll = true;
+ break;
case 'c':
cfg_num_pkts = strtoul(optarg, NULL, 10);
break;
case 'C':
cfg_use_cmsg = true;
break;
- case 'D':
- cfg_no_delay = true;
+ case 'e':
+ cfg_use_epoll = true;
break;
+ case 'E':
+ cfg_use_epoll = true;
+ cfg_epollet = true;
case 'F':
cfg_poll_timeout = -1;
break;
@@ -604,6 +738,9 @@ static void parse_opt(int argc, char **argv)
case 'n':
cfg_loop_nodata = true;
break;
+ case 'N':
+ cfg_print_nsec = true;
+ break;
case 'p':
dest_port = strtoul(optarg, NULL, 10);
break;
@@ -623,6 +760,12 @@ static void parse_opt(int argc, char **argv)
cfg_proto = SOCK_RAW;
cfg_ipproto = IPPROTO_RAW;
break;
+ case 'S':
+ cfg_sleep_usec = strtoul(optarg, NULL, 10);
+ break;
+ case 't':
+ cfg_delay_tolerance_usec = strtoul(optarg, NULL, 10);
+ break;
case 'u':
proto_count++;
cfg_proto = SOCK_DGRAM;
@@ -653,6 +796,8 @@ static void parse_opt(int argc, char **argv)
error(1, 0, "pass -P, -r, -R or -u, not multiple");
if (cfg_do_pktinfo && cfg_use_pf_packet)
error(1, 0, "cannot ask for pktinfo over pf_packet");
+ if (cfg_busy_poll && cfg_use_epoll)
+ error(1, 0, "pass epoll or busy_poll, not both");
if (optind != argc - 1)
error(1, 0, "missing required hostname argument");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.