DPDK patches and discussions
 help / color / mirror / Atom feed
From: "Varghese, Vipin" <vipin.varghese@intel.com>
To: "Pattan, Reshma" <reshma.pattan@intel.com>,
	"dev@dpdk.org" <dev@dpdk.org>
Cc: "Wiles, Keith" <keith.wiles@intel.com>,
	"Mcnamara, John" <john.mcnamara@intel.com>,
	"Byrne, Stephen1" <stephen1.byrne@intel.com>,
	"Tamboli, Amit S" <amit.tamboli@intel.com>,
	"Padubidri, Sanjay A" <sanjay.padubidri@intel.com>,
	"Patel, Amol" <amol.patel@intel.com>,
	"Kovacevic, Marko" <marko.kovacevic@intel.com>
Subject: Re: [dpdk-dev] [PATCH v3] app/pdump: enhance to support multi-core capture
Date: Fri, 29 Mar 2019 10:22:04 +0000	[thread overview]
Message-ID: <4C9E0AB70F954A408CC4ADDBF0F8FA7D4D32780A@BGSMSX101.gar.corp.intel.com> (raw)
Message-ID: <20190329102204.7YcbsrsoLqgFBMOrOAPjvuFxKN9N8ztyGp2e7yclHUI@z> (raw)
In-Reply-To: <3AEA2BF9852C6F48A459DA490692831F2A432BA2@irsmsx110.ger.corp.intel.com>

Hi Reshma,

snipped
> >
> >  /* true if x is a power of 2 */
> >  #define POWEROF2(x) ((((x)-1) & (x)) == 0) @@ -144,7 +145,7 @@ static
> > volatile uint8_t quit_signal;  static void  pdump_usage(const char *prgname)  {
> > -	printf("usage: %s [EAL options] -- --pdump "
> > +	printf("usage: %s [EAL options] -- [-l <list of cores>] --pdump "
> 
> Using -l option same as eal is confusing. Please use other name.
Current implementation passes core-mask '-cx1' as EAL argument. The check for user argument '-l <core1,core2,core3' is done before rte_eal_init. Once identified it is replaced with c_flag.

Hence I disagree to the point it is confusing.

> Also how about moving this  new option inside --pdump"" so it will be clearly
> known that the particular core will be associated to that tuple.
Yes, this can be done.

> 
> Also, I have some major concern, check my below comments.
Thanks for your concerns, let me try to address them below.

> 
> >  			"'(port=<port id> | device_id=<pci id or vdev name>),"
> >  			"(queue=<queue_id>),"
> >  			"(rx-dev=<iface or pcap file> |"
> > @@ -415,6 +416,7 @@ print_pdump_stats(void)
> >  	for (i = 0; i < num_tuples; i++) {
> >  		printf("##### PDUMP DEBUG STATS #####\n");
> >  		pt = &pdump_t[i];
> > +		printf(" == DPDK interface (%d) ==\n", i);
> 
> Here good to print the portid/deviceid and queue info, instead of printing pdump
> tuple index  i? User might not understand that.
I am not sure, why you mention that I am displaying tuple index with I here?

> Use ### instead of === as above.
I can do this, but is there specific reasoning for "####" as it is used to represent main header?

> 
> > +
> >  static inline void
> >  dump_packets(void)
> >  {
> >  	int i;
> > -	struct pdump_tuples *pt;
> > +	uint32_t lcore_id = 0;
> > +
> > +	lcore_id = rte_get_next_lcore(lcore_id, 1, 1);
> > +
> > +	if (rte_lcore_count() == 1) {
> > +		while (!quit_signal) {
> > +			for (i = 0; i < num_tuples; i++) {
> > +				struct pdump_tuples *pt = &pdump_t[i];
> > +				pdump_packets(pt);
> > +			}
> > +		}
> > +	} else {
> > +		printf(" Tuples (%u) lcores (%u)\n",
> > +			num_tuples, rte_lcore_count());
> > +
> > +		if ((uint32_t)num_tuples >= rte_lcore_count()) {
> > +			printf("Insufficent Cores\n");
> Typo %s/Insufficent/
Ok

> 
> 
> > +	for (i = 0; i < argc; i++) {
> > +		if (strstr(argv[i], "-l")) {
> > +			snprintf(c_flag, RTE_DIM(c_flag), "-l %s", argv[i+1]);
> 
> You are taking this as application arguments then making it as eal argument  to
> run the application.
I have explained the same above.

> Why not enable the needed number of cores in core mask using eal options -l 
I think what you are saying is "allow user to pass -l option or -c option before `--`". Then before invoking rte_eal_init replace it. Is this your requirement?

and
> have new core param in pdump tuple to run that tuple on that core.
> 
> Ex:
> If you check l3fwd as an example the cores should enabled using -c or -l and then
> they have separate --config l3fwd option in which they specify the core on which
> the packet processing should be run. Please check that and similar would be good
> here too.
I have already explained, pdump application makes static assignment of '-cx1'. If you try passing '-c' or '-l' the error check in rte_eal_init will prevent such assignment.

> 
> > +			strlcpy(argv[i], "", 2);
> > +			strlcpy(argv[i + 1], "", 2);
> 
> Why is this?
I have explained this above.


 Anyway, rte_strlcpy should be used instead of strlcpy.
Ok

> 
> Thanks,
> Reshma
Hi Reshma, thanks for feedbacks on cosmetic, spelling and using rte_strlcpy

  parent reply	other threads:[~2019-03-29 10:22 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-28  6:00 [dpdk-dev] [PATCH] " Vipin Varghese
2019-03-28  6:00 ` Vipin Varghese
2019-03-28 14:57 ` [dpdk-dev] [PATCH v2] " Vipin Varghese
2019-03-28 14:57   ` Vipin Varghese
2019-03-28 15:04   ` [dpdk-dev] [PATCH v3] " Vipin Varghese
2019-03-28 15:04     ` Vipin Varghese
2019-03-28 15:34     ` Wiles, Keith
2019-03-28 15:34       ` Wiles, Keith
2019-03-29 10:08     ` Pattan, Reshma
2019-03-29 10:08       ` Pattan, Reshma
2019-03-29 10:22       ` Varghese, Vipin [this message]
2019-03-29 10:22         ` Varghese, Vipin
2019-03-29 10:52         ` Pattan, Reshma
2019-03-29 10:52           ` Pattan, Reshma
2019-03-29 17:03         ` Ferruh Yigit
2019-03-29 17:03           ` Ferruh Yigit
2019-04-01  4:05           ` Varghese, Vipin
2019-04-01  4:05             ` Varghese, Vipin
2019-04-02  4:33     ` [dpdk-dev] [PATCH v4 0/2] app/pdump: enhance to support unique cores Vipin Varghese
2019-04-02  4:33       ` Vipin Varghese
2019-04-02  4:33       ` [dpdk-dev] [PATCH v4 1/2] app/pdump: remove core restriction Vipin Varghese
2019-04-02  4:33         ` Vipin Varghese
2019-04-02  4:33       ` [dpdk-dev] [PATCH v4 2/2] app/pdump: enhance to support multi-core capture Vipin Varghese
2019-04-02  4:33         ` Vipin Varghese
2019-04-02  7:05         ` David Marchand
2019-04-02  7:05           ` David Marchand
2019-04-02  8:06           ` Varghese, Vipin
2019-04-02  8:06             ` Varghese, Vipin
2019-04-02  9:18         ` [dpdk-dev] [PATCH v5 0/2] app/pdump: enhance to support unique cores Vipin Varghese
2019-04-02  9:18           ` Vipin Varghese
2019-04-02  9:18           ` [dpdk-dev] [PATCH v5 1/2] app/pdump: remove core restriction Vipin Varghese
2019-04-02  9:18             ` Vipin Varghese
2019-04-02  9:18           ` [dpdk-dev] [PATCH v5 2/2] app/pdump: enhance to support multi-core capture Vipin Varghese
2019-04-02  9:18             ` Vipin Varghese
2019-04-02 10:01             ` David Marchand
2019-04-02 10:01               ` David Marchand
2019-04-02 15:30               ` Varghese, Vipin
2019-04-02 15:30                 ` Varghese, Vipin
2019-04-04  7:39                 ` David Marchand
2019-04-04  7:39                   ` David Marchand
2019-04-02 16:13             ` Pattan, Reshma
2019-04-02 16:13               ` Pattan, Reshma
2019-04-03  3:53               ` Varghese, Vipin
2019-04-03  3:53                 ` Varghese, Vipin
2019-04-05 17:10                 ` Pattan, Reshma
2019-04-05 17:10                   ` Pattan, Reshma
2019-04-08  3:03                   ` Varghese, Vipin
2019-04-08  3:03                     ` Varghese, Vipin
2019-04-04  8:55             ` [dpdk-dev] [PATCH v6 0/2] app/pdump: enhance to support unique cores Vipin Varghese
2019-04-04  8:55               ` Vipin Varghese
2019-04-04  8:55               ` [dpdk-dev] [PATCH v6 1/2] app/pdump: remove core restriction Vipin Varghese
2019-04-04  8:55                 ` Vipin Varghese
2019-04-09  9:04                 ` Pattan, Reshma
2019-04-09  9:04                   ` Pattan, Reshma
2019-04-04  8:55               ` [dpdk-dev] [PATCH v6 2/2] app/pdump: enhance to support multi-core capture Vipin Varghese
2019-04-04  8:55                 ` Vipin Varghese
2019-04-05 17:09                 ` Pattan, Reshma
2019-04-05 17:09                   ` Pattan, Reshma
2019-04-08  3:01                   ` Varghese, Vipin
2019-04-08  3:01                     ` Varghese, Vipin
2019-04-09  9:05                 ` Pattan, Reshma
2019-04-09  9:05                   ` Pattan, Reshma
2019-04-22 19:49               ` [dpdk-dev] [PATCH v6 0/2] app/pdump: enhance to support unique cores Thomas Monjalon
2019-04-22 19:49                 ` Thomas Monjalon

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=4C9E0AB70F954A408CC4ADDBF0F8FA7D4D32780A@BGSMSX101.gar.corp.intel.com \
    --to=vipin.varghese@intel.com \
    --cc=amit.tamboli@intel.com \
    --cc=amol.patel@intel.com \
    --cc=dev@dpdk.org \
    --cc=john.mcnamara@intel.com \
    --cc=keith.wiles@intel.com \
    --cc=marko.kovacevic@intel.com \
    --cc=reshma.pattan@intel.com \
    --cc=sanjay.padubidri@intel.com \
    --cc=stephen1.byrne@intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).