From: Ferruh Yigit <ferruh.yigit@intel.com>
To: Aaron Conole <aconole@redhat.com>
Cc: oulijun <oulijun@huawei.com>,
xiaoyun.li@intel.com, dev@dpdk.org, linuxarm@openeuler.org,
Andrew Rybchenko <arybchenko@solarflare.com>,
Thomas Monjalon <thomas@monjalon.net>,
Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
Subject: Re: [dpdk-dev] [PATCH V2] app/testpmd: support Tx mbuf free on demand cmd
Date: Tue, 9 Mar 2021 14:13:15 +0000 [thread overview]
Message-ID: <f0e452ac-f4f8-4cf1-1700-e54d36e2cadd@intel.com> (raw)
In-Reply-To: <f7to8fsig07.fsf@dhcp-25.97.bos.redhat.com>
On 3/9/2021 2:00 PM, Aaron Conole wrote:
> Ferruh Yigit <ferruh.yigit@intel.com> writes:
>
>> On 3/9/2021 8:49 AM, oulijun wrote:
>>>
>>>
>>> 在 2021/3/9 1:33, Ferruh Yigit 写道:
>>>> On 3/5/2021 9:57 AM, Lijun Ou wrote:
>>>>> From: Chengwen Feng <fengchengwen@huawei.com>
>>>>>
>>>>> This patch support tx_done_cleanup command:
>>>>> tx_done_cleanup port (port_id) (queue_id) (free_cnt)
>>>>>
>>>>> Users must make sure there are no concurrent access to the same Tx
>>>>> queue (like rte_eth_tx_burst, rte_eth_dev_tx_queue_stop and so on)
>>>>> this command executed.
>>>>>
>>>>
>>>> Hi Lijun,
>>>>
>>>> Is the intention to test the PMD implementation?
>>> Yes
>>>> As you highlighted the API is for the datapath, a command for it is
>>>> not easy to use, not sure how useful it will be.
>>>> Perhaps it can be option to use this API in a forwarding engine,
>>>> like 'txonly', controlled by a command, but again not sure what to
>>>> observe/measure etc..
>>>>
>>> We want to do this. But it is diffcult to control the number of sent
>>> packets when used together with other txonly.
>>
>> Agree hard to verify that the implementation this way.
>>
>> What do you think adding an unit test for it,
>> 'app/test/test_ethdev_xx', that can send some packets get the free
>> mbufs number, call the 'rte_eth_tx_done_cleanup()' and check the free
>> mbuf numbers again and return a fail/success accordingly.
>>
>> And this can be a good start for our long missing ethdev unit tests,
>> cc'ed Aaron and Honnappa for the unit test perspective.
>
> Definitely, let's do it. There's a start to a guide detailing how to
> create unit tests and suites ;). I'll post the latest version this week.
>
>> And if we go with unit test, I think we need to find a way to mark the
>> unit tests that requires HW (this case) for the automation usecases.
>
> Does it really need HW, though? Can we use a software device for it?
> Maybe it's a good time to use the null dev for test purposes for these
> libraries. After all, we want to be testing the library.
>
For some cases we can use virtual devices, but for this case the actual
intention is to test the PMD implementation.
Overall I guess we need both, the HW dependent and independent unit tests.
>>>>> Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
>>>>> Signed-off-by: Lijun Ou <oulijun@huawei.com>
>>>>> ---
>>>>> V1->V2:
>>>>> - use Tx instead of TX
>>>>> - add note in doc
>>>>> ---
>>>>> app/test-pmd/cmdline.c | 91 +++++++++++++++++++++++++++++
>>>>> doc/guides/rel_notes/release_21_05.rst | 2 +
>>>>> doc/guides/testpmd_app_ug/testpmd_funcs.rst | 11 ++++
>>>>> 3 files changed, 104 insertions(+)
>>>>>
>>>>> diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
>>>>> index 14110eb..4df0c32 100644
>>>>> --- a/app/test-pmd/cmdline.c
>>>>> +++ b/app/test-pmd/cmdline.c
>>>>> @@ -36,6 +36,7 @@
>>>>> #include <rte_pci.h>
>>>>> #include <rte_ether.h>
>>>>> #include <rte_ethdev.h>
>>>>> +#include <rte_ethdev_driver.h>
>>>>
>>>> This header for PMDs to include, applications shouldn't include
>>>> this, including this means you are accessing dpdk internals which
>>>> you shouldn't access.
>>>>
>>> Thanks. I will fix it.
>>>>> #include <rte_string_fns.h>
>>>>> #include <rte_devargs.h>
>>>>> #include <rte_flow.h>
>>>>> @@ -675,6 +676,9 @@ static void cmd_help_long_parsed(void *parsed_result,
>>>>> "set port (port_id) ptype_mask (ptype_mask)\n"
>>>>> " set packet types classification for a specific port\n\n"
>>>>> + "tx_done_cleanup (port_id) (queue_id) (free_cnt)\n"
>>>>> + " Cleanup a Tx queue's mbuf on a port\n\n"
>>>>> +
>>>>> "set port (port_id) queue-region region_id (value) "
>>>>> "queue_start_index (value) queue_num (value)\n"
>>>>> " Set a queue region on a port\n\n"
>>>>> @@ -16910,6 +16914,92 @@ cmdline_parse_inst_t cmd_showport_macs = {
>>>>> },
>>>>> };
>>>>> +/* *** tx_done_cleanup *** */
>>>>> +struct cmd_tx_done_cleanup_result {
>>>>> + cmdline_fixed_string_t clean;
>>>>> + cmdline_fixed_string_t port;
>>>>> + uint16_t port_id;
>>>>> + uint16_t queue_id;
>>>>> + uint32_t free_cnt;
>>>>> +};
>>>>> +
>>>>> +static void
>>>>> +cmd_tx_done_cleanup_parsed(void *parsed_result,
>>>>> + __rte_unused struct cmdline *cl,
>>>>> + __rte_unused void *data)
>>>>> +{
>>>>> + struct cmd_tx_done_cleanup_result *res = parsed_result;
>>>>> + struct rte_eth_dev *dev;
>>>>> + uint16_t port_id = res->port_id;
>>>>> + uint16_t queue_id = res->queue_id;
>>>>> + uint32_t free_cnt = res->free_cnt;
>>>>> + int ret;
>>>>> +
>>>>> + if (!rte_eth_dev_is_valid_port(port_id)) {
>>>>> + printf("Invalid port_id %u\n", port_id);
>>>>> + return;
>>>>> + }
>>>>> +
>>>>> + dev = &rte_eth_devices[port_id];
>>>>
>>>> Similar to above comment 'rte_eth_devices' is the internal
>>>> variable, applications should not access it directly.
>>>>
>>> No API is available, and multiple references exist in the testpmd file.
>>
>> Technically 'rte_eth_devices' is still visible to the applications
>> because of the static inline functions, in theory it should be hidden.
>>
>> But this variable accessed by our test application multiple times may
>> be the sign that something more is missing.
>>
>> Thomas, Andrew, what to you think to try to clean this usage from
>> testpmd and add more APIs if needed for this?
>>
>>>>> + if (queue_id >= dev->data->nb_tx_queues) {
>>>>> + printf("Invalid Tx queue_id %u\n", queue_id);
>>>>> + return;
>>>>> + }
>>>>> +
>>>>
>>>> Number of the queues can be get via 'rte_eth_dev_info_get()'.
>>>>
>>> This is also called in txonly. Do you want to replace it?
>>
>> That would be good if you can do it in a separate patch, thank you.
>
next prev parent reply other threads:[~2021-03-09 14:13 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-05 7:33 [dpdk-dev] [PATCH] " Lijun Ou
2021-03-05 7:46 ` Li, Xiaoyun
2021-03-05 9:58 ` oulijun
2021-03-05 9:57 ` [dpdk-dev] [PATCH V2] " Lijun Ou
2021-03-08 17:33 ` Ferruh Yigit
2021-03-09 8:49 ` oulijun
2021-03-09 9:53 ` Ferruh Yigit
2021-03-09 9:57 ` Thomas Monjalon
2021-03-09 10:18 ` Andrew Rybchenko
2021-03-09 14:00 ` Aaron Conole
2021-03-09 14:13 ` Ferruh Yigit [this message]
2021-03-10 1:48 ` oulijun
2021-03-10 7:59 ` Thomas Monjalon
2021-03-12 10:29 ` [dpdk-dev] [Linuxarm] " oulijun
2021-03-12 11:21 ` Thomas Monjalon
2021-03-17 11:30 ` oulijun
2021-03-17 12:07 ` Thomas Monjalon
2021-03-18 3:56 ` oulijun
2021-03-18 7:51 ` Thomas Monjalon
2021-04-12 13:12 ` [dpdk-dev] [PATCH V3] " Lijun Ou
2021-04-19 3:11 ` Li, Xiaoyun
2021-04-19 12:40 ` oulijun
2021-04-19 14:56 ` Ferruh Yigit
2021-04-19 12:36 ` [dpdk-dev] [PATCH V4] " Lijun Ou
2021-04-19 15:28 ` Ferruh Yigit
2021-04-21 1:44 ` oulijun
2021-04-21 8:09 ` [dpdk-dev] [PATCH V5] app/test-pmd: support cleanup txq mbufs command Lijun Ou
2021-04-21 8:15 ` Ferruh Yigit
2021-04-21 8:32 ` oulijun
2021-04-21 8:45 ` [dpdk-dev] [PATCH V6] " Lijun Ou
2021-04-21 11:26 ` Ferruh Yigit
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