[bpf-next PATCH v3 4/7] bpf: sockmap sample, report bytes/sec

John Fastabend
2018-01-12T05:07:23Z

Report bytes/sec sent as well as total bytes. Useful to get rough
idea how different configurations and usage patterns perform with
sockmap.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
---
samples/sockmap/sockmap_user.c | 37 ++++++++++++++++++++++++++++++++-----
1 file changed, 32 insertions(+), 5 deletions(-)

diff --git a/samples/sockmap/sockmap_user.c b/samples/sockmap/sockmap_user.c
index bbe9587..442fc00 100644
--- a/samples/sockmap/sockmap_user.c
+++ b/samples/sockmap/sockmap_user.c
@@ -24,6 +24,7 @@
#include <signal.h>
#include <fcntl.h>
#include <sys/wait.h>
+#include <time.h>

#include <sys/time.h>
#include <sys/types.h>
@@ -189,14 +190,16 @@ static int sockmap_init_sockets(void)
struct msg_stats {
size_t bytes_sent;
size_t bytes_recvd;
+ struct timespec start;
+ struct timespec end;
};

static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
struct msg_stats *s, bool tx)
{
struct msghdr msg = {0};
+ int err, i, flags = MSG_NOSIGNAL;
struct iovec *iov;
- int i, flags = MSG_NOSIGNAL;

iov = calloc(iov_count, sizeof(struct iovec));
if (!iov)
@@ -218,6 +221,7 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
msg.msg_iovlen = iov_count;

if (tx) {
+ clock_gettime(CLOCK_MONOTONIC, &s->start);
for (i = 0; i < cnt; i++) {
int sent = sendmsg(fd, &msg, flags);

@@ -228,6 +232,7 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
}
s->bytes_sent += sent;
}
+ clock_gettime(CLOCK_MONOTONIC, &s->end);
} else {
int slct, recv, max_fd = fd;
struct timeval timeout;
@@ -235,6 +240,9 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
fd_set w;

total_bytes = (float)iov_count * (float)iov_length * (float)cnt;
+ err = clock_gettime(CLOCK_MONOTONIC, &s->start);
+ if (err < 0)
+ perror("recv start time: ");
while (s->bytes_recvd < total_bytes) {
timeout.tv_sec = 1;
timeout.tv_usec = 0;
@@ -246,15 +254,18 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
slct = select(max_fd + 1, &w, NULL, NULL, &timeout);
if (slct == -1) {
perror("select()");
+ clock_gettime(CLOCK_MONOTONIC, &s->end);
goto out_errno;
} else if (!slct) {
fprintf(stderr, "unexpected timeout\n");
+ clock_gettime(CLOCK_MONOTONIC, &s->end);
goto out_errno;
}

recv = recvmsg(fd, &msg, flags);
if (recv < 0) {
if (errno != EWOULDBLOCK) {
+ clock_gettime(CLOCK_MONOTONIC, &s->end);
perror("recv failed()\n");
goto out_errno;
}
@@ -262,6 +273,7 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,

s->bytes_recvd += recv;
}
+ clock_gettime(CLOCK_MONOTONIC, &s->end);
}

for (i = 0; i < iov_count; i++)
@@ -273,11 +285,14 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt,
return errno;
}

+static float giga = 1000000000;
+
static int sendmsg_test(int iov_count, int iov_buf, int cnt, int verbose)
{
int txpid, rxpid, err = 0;
struct msg_stats s = {0};
int status;
+ float sent_Bps = 0, recvd_Bps = 0;

errno = 0;

@@ -288,10 +303,16 @@ static int sendmsg_test(int iov_count, int iov_buf, int cnt, int verbose)
fprintf(stderr,
"msg_loop_rx: iov_count %i iov_buf %i cnt %i err %i\n",
iov_count, iov_buf, cnt, err);
- fprintf(stdout, "rx_sendmsg: TX_bytes %zu RX_bytes %zu\n",
- s.bytes_sent, s.bytes_recvd);
shutdown(p2, SHUT_RDWR);
shutdown(p1, SHUT_RDWR);
+ if (s.end.tv_sec - s.start.tv_sec) {
+ sent_Bps = s.bytes_sent / (s.end.tv_sec - s.start.tv_sec);
+ recvd_Bps = s.bytes_recvd / (s.end.tv_sec - s.start.tv_sec);
+ }
+ fprintf(stdout,
+ "rx_sendmsg: TX: %zuB %fB/s %fGB/s RX: %zuB %fB/s %fGB/s\n",
+ s.bytes_sent, sent_Bps, sent_Bps/giga,
+ s.bytes_recvd, recvd_Bps, recvd_Bps/giga);
exit(1);
} else if (rxpid == -1) {
perror("msg_loop_rx: ");
@@ -305,9 +326,15 @@ static int sendmsg_test(int iov_count, int iov_buf, int cnt, int verbose)
fprintf(stderr,
"msg_loop_tx: iov_count %i iov_buf %i cnt %i err %i\n",
iov_count, iov_buf, cnt, err);
- fprintf(stdout, "tx_sendmsg: TX_bytes %zu RX_bytes %zu\n",
- s.bytes_sent, s.bytes_recvd);
shutdown(c1, SHUT_RDWR);
+ if (s.end.tv_sec - s.start.tv_sec) {
+ sent_Bps = s.bytes_sent / (s.end.tv_sec - s.start.tv_sec);
+ recvd_Bps = s.bytes_recvd / (s.end.tv_sec - s.start.tv_sec);
+ }
+ fprintf(stdout,
+ "tx_sendmsg: TX: %zuB %fB/s %f GB/s RX: %zuB %fB/s %fGB/s\n",
+ s.bytes_sent, sent_Bps, sent_Bps/giga,
+ s.bytes_recvd, recvd_Bps, recvd_Bps/giga);
exit(1);
} else if (txpid == -1) {
perror("msg_loop_tx: ");