This series fixes error handling, timeout and data verification in test_sockmap. Previously it was not able to detect failure/timeout in RX/TX thread because error was not notified to the main thread.
Also slightly improved test output by printing parameter values (cork, apply, start, end) so that parameters for all tests are displayed.
Changes in v3: - Skipped error checking for corked tests
Prashant Bhole (5): selftests/bpf: test_sockmap, check test failure selftests/bpf: test_sockmap, join cgroup in selftest mode selftests/bpf: test_sockmap, fix test timeout selftests/bpf: test_sockmap, fix data verification selftests/bpf: test_sockmap, print additional test options
tools/testing/selftests/bpf/test_sockmap.c | 76 +++++++++++++++++----- 1 file changed, 58 insertions(+), 18 deletions(-)
Test failures are not identified because exit code of RX/TX threads is not checked. Also threads are not returning correct exit code.
- Return exit code from threads depending on test execution status - In main thread, check the exit code of RX/TX threads - Skip error checking for corked tests as they are expected to timeout
Fixes: 16962b2404ac ("bpf: sockmap, add selftests") Signed-off-by: Prashant Bhole bhole_prashant_q7@lab.ntt.co.jp --- tools/testing/selftests/bpf/test_sockmap.c | 25 ++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-)
diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c index eb17fae458e6..01bc9c6745e8 100644 --- a/tools/testing/selftests/bpf/test_sockmap.c +++ b/tools/testing/selftests/bpf/test_sockmap.c @@ -429,8 +429,8 @@ static int sendmsg_test(struct sockmap_options *opt) struct msg_stats s = {0}; int iov_count = opt->iov_count; int iov_buf = opt->iov_length; + int rx_status, tx_status; int cnt = opt->rate; - int status;
errno = 0;
@@ -442,7 +442,7 @@ static int sendmsg_test(struct sockmap_options *opt) rxpid = fork(); if (rxpid == 0) { if (opt->drop_expected) - exit(1); + exit(0);
if (opt->sendpage) iov_count = 1; @@ -463,7 +463,7 @@ static int sendmsg_test(struct sockmap_options *opt) "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); + exit(err ? 1 : 0); } else if (rxpid == -1) { perror("msg_loop_rx: "); return errno; @@ -491,14 +491,27 @@ static int sendmsg_test(struct sockmap_options *opt) "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); + exit(err ? 1 : 0); } else if (txpid == -1) { perror("msg_loop_tx: "); return errno; }
- assert(waitpid(rxpid, &status, 0) == rxpid); - assert(waitpid(txpid, &status, 0) == txpid); + assert(waitpid(rxpid, &rx_status, 0) == rxpid); + assert(waitpid(txpid, &tx_status, 0) == txpid); + if (WIFEXITED(rx_status)) { + err = WEXITSTATUS(rx_status); + if (err && !txmsg_cork) { + fprintf(stderr, "rx thread exited with err %d. ", err); + goto out; + } + } + if (WIFEXITED(tx_status)) { + err = WEXITSTATUS(tx_status); + if (err) + fprintf(stderr, "tx thread exited with err %d. ", err); + } +out: return err; }
In case of selftest mode, temporary cgroup environment is created but cgroup is not joined. It causes test failures. Fixed by joining the cgroup
Fixes: 16962b2404ac ("bpf: sockmap, add selftests") Acked-by: John Fastabend john.fastabend@gmail.com Signed-off-by: Prashant Bhole bhole_prashant_q7@lab.ntt.co.jp --- tools/testing/selftests/bpf/test_sockmap.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c index 01bc9c6745e8..64f9e25c451f 100644 --- a/tools/testing/selftests/bpf/test_sockmap.c +++ b/tools/testing/selftests/bpf/test_sockmap.c @@ -1342,6 +1342,11 @@ static int __test_suite(char *bpf_file) return cg_fd; }
+ if (join_cgroup(CG_PATH)) { + fprintf(stderr, "ERROR: failed to join cgroup\n"); + return -EINVAL; + } + /* Tests basic commands and APIs with range of iov values */ txmsg_start = txmsg_end = 0; err = test_txmsg(cg_fd);
In order to reduce runtime of tests, recently timout for select() call was reduced from 1sec to 10usec. This was causing many tests failures. It was caught with failure handling commits in this series.
Restoring the timeout from 10usec to 1sec
Fixes: a18fda1a62c3 ("bpf: reduce runtime of test_sockmap tests") Signed-off-by: Prashant Bhole bhole_prashant_q7@lab.ntt.co.jp --- tools/testing/selftests/bpf/test_sockmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c index 64f9e25c451f..9d01f5c2abe2 100644 --- a/tools/testing/selftests/bpf/test_sockmap.c +++ b/tools/testing/selftests/bpf/test_sockmap.c @@ -345,8 +345,8 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt, if (err < 0) perror("recv start time: "); while (s->bytes_recvd < total_bytes) { - timeout.tv_sec = 0; - timeout.tv_usec = 10; + timeout.tv_sec = 1; + timeout.tv_usec = 0;
/* FD sets */ FD_ZERO(&w);
When data verification is enabled, some tests fail because verification is done incorrectly. Following changes fix it.
- Identify the size of data block to be verified - Reset verification counter when data block size is reached - Fixed the value printed in case of verfication failure
Fixes: 16962b2404ac ("bpf: sockmap, add selftests") Acked-by: John Fastabend john.fastabend@gmail.com Signed-off-by: Prashant Bhole bhole_prashant_q7@lab.ntt.co.jp --- tools/testing/selftests/bpf/test_sockmap.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c index 9d01f5c2abe2..664f268dc02a 100644 --- a/tools/testing/selftests/bpf/test_sockmap.c +++ b/tools/testing/selftests/bpf/test_sockmap.c @@ -337,8 +337,15 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt, int fd_flags = O_NONBLOCK; struct timeval timeout; float total_bytes; + int bytes_cnt = 0; + int chunk_sz; fd_set w;
+ if (opt->sendpage) + chunk_sz = iov_length * cnt; + else + chunk_sz = iov_length * iov_count; + fcntl(fd, fd_flags); total_bytes = (float)iov_count * (float)iov_length * (float)cnt; err = clock_gettime(CLOCK_MONOTONIC, &s->start); @@ -388,9 +395,14 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt, errno = -EIO; fprintf(stderr, "detected data corruption @iov[%i]:%i %02x != %02x, %02x ?= %02x\n", - i, j, d[j], k - 1, d[j+1], k + 1); + i, j, d[j], k - 1, d[j+1], k); goto out_errno; } + bytes_cnt++; + if (bytes_cnt == chunk_sz) { + k = 0; + bytes_cnt = 0; + } recv--; } }
Print values of test options like apply, cork, start, end so that individual failed tests can be identified for manual run
Acked-by: John Fastabend john.fastabend@gmail.com Signed-off-by: Prashant Bhole bhole_prashant_q7@lab.ntt.co.jp --- tools/testing/selftests/bpf/test_sockmap.c | 28 +++++++++++++++------- 1 file changed, 19 insertions(+), 9 deletions(-)
diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c index 664f268dc02a..637c6585ff80 100644 --- a/tools/testing/selftests/bpf/test_sockmap.c +++ b/tools/testing/selftests/bpf/test_sockmap.c @@ -869,6 +869,8 @@ static char *test_to_str(int test) #define OPTSTRING 60 static void test_options(char *options) { + char tstr[OPTSTRING]; + memset(options, 0, OPTSTRING);
if (txmsg_pass) @@ -881,14 +883,22 @@ static void test_options(char *options) strncat(options, "redir_noisy,", OPTSTRING); if (txmsg_drop) strncat(options, "drop,", OPTSTRING); - if (txmsg_apply) - strncat(options, "apply,", OPTSTRING); - if (txmsg_cork) - strncat(options, "cork,", OPTSTRING); - if (txmsg_start) - strncat(options, "start,", OPTSTRING); - if (txmsg_end) - strncat(options, "end,", OPTSTRING); + if (txmsg_apply) { + snprintf(tstr, OPTSTRING, "apply %d,", txmsg_apply); + strncat(options, tstr, OPTSTRING); + } + if (txmsg_cork) { + snprintf(tstr, OPTSTRING, "cork %d,", txmsg_cork); + strncat(options, tstr, OPTSTRING); + } + if (txmsg_start) { + snprintf(tstr, OPTSTRING, "start %d,", txmsg_start); + strncat(options, tstr, OPTSTRING); + } + if (txmsg_end) { + snprintf(tstr, OPTSTRING, "end %d,", txmsg_end); + strncat(options, tstr, OPTSTRING); + } if (txmsg_ingress) strncat(options, "ingress,", OPTSTRING); if (txmsg_skb) @@ -897,7 +907,7 @@ static void test_options(char *options)
static int __test_exec(int cgrp, int test, struct sockmap_options *opt) { - char *options = calloc(60, sizeof(char)); + char *options = calloc(OPTSTRING, sizeof(char)); int err;
if (test == SENDPAGE)
On 05/29/2018 10:56 PM, Prashant Bhole wrote:
Test failures are not identified because exit code of RX/TX threads is not checked. Also threads are not returning correct exit code.
- Return exit code from threads depending on test execution status
- In main thread, check the exit code of RX/TX threads
- Skip error checking for corked tests as they are expected to timeout
Fixes: 16962b2404ac ("bpf: sockmap, add selftests") Signed-off-by: Prashant Bhole bhole_prashant_q7@lab.ntt.co.jp
tools/testing/selftests/bpf/test_sockmap.c | 25 ++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-)
Looks good. Thanks.
Acked-by: John Fastabend john.fastabend@gmail.com -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 05/29/2018 10:56 PM, Prashant Bhole wrote:
In order to reduce runtime of tests, recently timout for select() call was reduced from 1sec to 10usec. This was causing many tests failures. It was caught with failure handling commits in this series.
Restoring the timeout from 10usec to 1sec
Fixes: a18fda1a62c3 ("bpf: reduce runtime of test_sockmap tests") Signed-off-by: Prashant Bhole bhole_prashant_q7@lab.ntt.co.jp
Quick question, how long does it take to run now with the time increase? If its taking too long we may need to remove some tests. I have a longer running test_sockmap script that I run as part of Cilium[1] project where I put longer running stress tests.
Acked-by: John Fastabend john.fastabend@gmail.com
[1] cilium.io -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 05/29/2018 10:56 PM, Prashant Bhole wrote:
This series fixes error handling, timeout and data verification in test_sockmap. Previously it was not able to detect failure/timeout in RX/TX thread because error was not notified to the main thread.
Also slightly improved test output by printing parameter values (cork, apply, start, end) so that parameters for all tests are displayed.
Changes in v3:
- Skipped error checking for corked tests
Prashant Bhole (5): selftests/bpf: test_sockmap, check test failure selftests/bpf: test_sockmap, join cgroup in selftest mode selftests/bpf: test_sockmap, fix test timeout selftests/bpf: test_sockmap, fix data verification selftests/bpf: test_sockmap, print additional test options
tools/testing/selftests/bpf/test_sockmap.c | 76 +++++++++++++++++----- 1 file changed, 58 insertions(+), 18 deletions(-)
Looks good thanks. We may want to tune the running time a bit but lets get this applied first. A lot of nice improvements!
.John -- To unsubscribe from this list: send the line "unsubscribe linux-kselftest" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, May 30, 2018 at 02:56:09PM +0900, Prashant Bhole wrote:
In order to reduce runtime of tests, recently timout for select() call was reduced from 1sec to 10usec. This was causing many tests failures. It was caught with failure handling commits in this series.
Restoring the timeout from 10usec to 1sec
Fixes: a18fda1a62c3 ("bpf: reduce runtime of test_sockmap tests") Signed-off-by: Prashant Bhole bhole_prashant_q7@lab.ntt.co.jp
tools/testing/selftests/bpf/test_sockmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c index 64f9e25c451f..9d01f5c2abe2 100644 --- a/tools/testing/selftests/bpf/test_sockmap.c +++ b/tools/testing/selftests/bpf/test_sockmap.c @@ -345,8 +345,8 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt, if (err < 0) perror("recv start time: "); while (s->bytes_recvd < total_bytes) {
timeout.tv_sec = 0;timeout.tv_usec = 10;
timeout.tv_sec = 1;timeout.tv_usec = 0;
I've applied the set, but had to revert it, since it takes too long.
real 1m40.124s user 0m0.375s sys 0m14.521s
Myself and Daniel run the test semi-manually when we apply patches. Adding 2 extra minutes of wait time is unnecessary. Especially since most of it is idle time. Please find a way to fix tests differently. btw I don't see any failures today. Not sure what is being fixed by incresing a timeout.
Also please mention [PATCH bpf-next] in the subject when you respin. Thanks!
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On 05/30/2018 12:29 PM, Alexei Starovoitov wrote:
On Wed, May 30, 2018 at 02:56:09PM +0900, Prashant Bhole wrote:
In order to reduce runtime of tests, recently timout for select() call was reduced from 1sec to 10usec. This was causing many tests failures. It was caught with failure handling commits in this series.
Restoring the timeout from 10usec to 1sec
Fixes: a18fda1a62c3 ("bpf: reduce runtime of test_sockmap tests") Signed-off-by: Prashant Bhole bhole_prashant_q7@lab.ntt.co.jp
tools/testing/selftests/bpf/test_sockmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c index 64f9e25c451f..9d01f5c2abe2 100644 --- a/tools/testing/selftests/bpf/test_sockmap.c +++ b/tools/testing/selftests/bpf/test_sockmap.c @@ -345,8 +345,8 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt, if (err < 0) perror("recv start time: "); while (s->bytes_recvd < total_bytes) {
timeout.tv_sec = 0;timeout.tv_usec = 10;
timeout.tv_sec = 1;timeout.tv_usec = 0;I've applied the set, but had to revert it, since it takes too long.
real 1m40.124s user 0m0.375s sys 0m14.521s
Dang, I thought it would be a bit longer but not minutes.
Myself and Daniel run the test semi-manually when we apply patches.> Adding 2 extra minutes of wait time is unnecessary.
Yep.
Especially since most of it is idle time. Please find a way to fix tests differently. btw I don't see any failures today. Not sure what is being fixed by incresing a timeout.
Calling these fixes is a bit much, they are primarily improvements.
The background is, when I originally wrote the tests my goal was to exercise the kernel code paths. Because of this I didn't really care if the tests actually sent/recv all bytes in the test. (I have long running tests using netperf/wrk/apached/etc. for that) But, the manual tests do have an option to verify the data if specified. The 'verify' option is a bit fragile in that with the right tests (e.g. drop) or the certain options (e.g. cork) it can fail which is expected.
What Prashant added was support to actually verify the data correctly. And also fix a few cgroup handling and some pretty printing as well. He noticed the low timeout causing issue in these cases though so increased it.
@Prashant, how about increasing this less dramatically because now all cork tests are going to stall for 1s unless perfectly aligned. How about 100us? Or even better we can conditionally set it based on if tx_cork is set. If tx_cork is set use 1us otherwise use 200us or something. (1s is really to high in any cases for lo)
Also capturing some of the above in the cover letter would help folks understand the context a bit better.
Thanks! John
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On 5/31/2018 4:59 AM, John Fastabend wrote:
On 05/30/2018 12:29 PM, Alexei Starovoitov wrote:
On Wed, May 30, 2018 at 02:56:09PM +0900, Prashant Bhole wrote:
In order to reduce runtime of tests, recently timout for select() call was reduced from 1sec to 10usec. This was causing many tests failures. It was caught with failure handling commits in this series.
Restoring the timeout from 10usec to 1sec
Fixes: a18fda1a62c3 ("bpf: reduce runtime of test_sockmap tests") Signed-off-by: Prashant Bhole bhole_prashant_q7@lab.ntt.co.jp
tools/testing/selftests/bpf/test_sockmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c index 64f9e25c451f..9d01f5c2abe2 100644 --- a/tools/testing/selftests/bpf/test_sockmap.c +++ b/tools/testing/selftests/bpf/test_sockmap.c @@ -345,8 +345,8 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt, if (err < 0) perror("recv start time: "); while (s->bytes_recvd < total_bytes) {
timeout.tv_sec = 0;timeout.tv_usec = 10;
timeout.tv_sec = 1;timeout.tv_usec = 0;I've applied the set, but had to revert it, since it takes too long.
real 1m40.124s user 0m0.375s sys 0m14.521s
Dang, I thought it would be a bit longer but not minutes.
Myself and Daniel run the test semi-manually when we apply patches.> Adding 2 extra minutes of wait time is unnecessary.
Yep.
Especially since most of it is idle time. Please find a way to fix tests differently. btw I don't see any failures today. Not sure what is being fixed by incresing a timeout.
Calling these fixes is a bit much, they are primarily improvements.
The background is, when I originally wrote the tests my goal was to exercise the kernel code paths. Because of this I didn't really care if the tests actually sent/recv all bytes in the test. (I have long running tests using netperf/wrk/apached/etc. for that) But, the manual tests do have an option to verify the data if specified. The 'verify' option is a bit fragile in that with the right tests (e.g. drop) or the certain options (e.g. cork) it can fail which is expected.
What Prashant added was support to actually verify the data correctly. And also fix a few cgroup handling and some pretty printing as well. He noticed the low timeout causing issue in these cases though so increased it.
@Prashant, how about increasing this less dramatically because now all cork tests are going to stall for 1s unless perfectly aligned. How about 100us? Or even better we can conditionally set it based on if tx_cork is set. If tx_cork is set use 1us otherwise use 200us or something. (1s is really to high in any cases for lo)
Also capturing some of the above in the cover letter would help folks understand the context a bit better.
I did trial and error for timeout values. Currently 1000us for corked tests and 1 sec for other tests works fine. I observed broken-pipe error at tx side when timeout was < 1000us.
Also tests with apply=1 and higher number of iterations were taking time, so reducing iterations reduces the test run time drastically.
real 0m12.968s user 0m0.219s sys 0m14.337s
Also I will try to explain background in the cover letter of next series.
-Prashant
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On 05/30/2018 09:13 PM, Prashant Bhole wrote:
On 5/31/2018 4:59 AM, John Fastabend wrote:
On 05/30/2018 12:29 PM, Alexei Starovoitov wrote:
On Wed, May 30, 2018 at 02:56:09PM +0900, Prashant Bhole wrote:
In order to reduce runtime of tests, recently timout for select() call was reduced from 1sec to 10usec. This was causing many tests failures. It was caught with failure handling commits in this series.
Restoring the timeout from 10usec to 1sec
Fixes: a18fda1a62c3 ("bpf: reduce runtime of test_sockmap tests") Signed-off-by: Prashant Bhole bhole_prashant_q7@lab.ntt.co.jp
tools/testing/selftests/bpf/test_sockmap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/test_sockmap.c b/tools/testing/selftests/bpf/test_sockmap.c index 64f9e25c451f..9d01f5c2abe2 100644 --- a/tools/testing/selftests/bpf/test_sockmap.c +++ b/tools/testing/selftests/bpf/test_sockmap.c @@ -345,8 +345,8 @@ static int msg_loop(int fd, int iov_count, int iov_length, int cnt, if (err < 0) perror("recv start time: "); while (s->bytes_recvd < total_bytes) { - timeout.tv_sec = 0; - timeout.tv_usec = 10; + timeout.tv_sec = 1; + timeout.tv_usec = 0;
I've applied the set, but had to revert it, since it takes too long.
real 1m40.124s user 0m0.375s sys 0m14.521s
Dang, I thought it would be a bit longer but not minutes.
Myself and Daniel run the test semi-manually when we apply patches.> Adding 2 extra minutes of wait time is unnecessary.
Yep.
Especially since most of it is idle time. Please find a way to fix tests differently. btw I don't see any failures today. Not sure what is being fixed by incresing a timeout.
Calling these fixes is a bit much, they are primarily improvements.
The background is, when I originally wrote the tests my goal was to exercise the kernel code paths. Because of this I didn't really care if the tests actually sent/recv all bytes in the test. (I have long running tests using netperf/wrk/apached/etc. for that) But, the manual tests do have an option to verify the data if specified. The 'verify' option is a bit fragile in that with the right tests (e.g. drop) or the certain options (e.g. cork) it can fail which is expected.
What Prashant added was support to actually verify the data correctly. And also fix a few cgroup handling and some pretty printing as well. He noticed the low timeout causing issue in these cases though so increased it.
@Prashant, how about increasing this less dramatically because now all cork tests are going to stall for 1s unless perfectly aligned. How about 100us? Or even better we can conditionally set it based on if tx_cork is set. If tx_cork is set use 1us otherwise use 200us or something. (1s is really to high in any cases for lo)
Also capturing some of the above in the cover letter would help folks understand the context a bit better.
I did trial and error for timeout values. Currently 1000us for corked tests and 1 sec for other tests works fine. I observed broken-pipe error at tx side when timeout was < 1000us.
Also tests with apply=1 and higher number of iterations were taking time, so reducing iterations reduces the test run time drastically.
Yep, sending 1B at a time is slow.
real 0m12.968s user 0m0.219s sys 0m14.337s
Also I will try to explain background in the cover letter of next series.
Seems more reasonable to me now. Thanks.
-Prashant
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