* [dpdk-dev] [PATCH] Function __mempool_get_bulk() returns wrong count.
@ 2014-09-27 18:41 Wiles, Roger Keith
2014-09-28 0:38 ` Neil Horman
2014-09-28 22:25 ` Ananyev, Konstantin
0 siblings, 2 replies; 5+ messages in thread
From: Wiles, Roger Keith @ 2014-09-27 18:41 UTC (permalink / raw)
To: <dev@dpdk.org>
When __mempool_get_bulk() grabs entries from the cache it
returns zero instead of the number of entries obtained. Plus
the stats were increased by the wrong count of objects.
Signed-off-by: Keith Wiles <keith.wiles@windriver.com>
---
lib/librte_mempool/rte_mempool.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
index 299d4d7..6750e78 100644
--- a/lib/librte_mempool/rte_mempool.h
+++ b/lib/librte_mempool/rte_mempool.h
@@ -988,9 +988,9 @@ __mempool_get_bulk(struct rte_mempool *mp, void **obj_table,
cache->len -= n;
- __MEMPOOL_STAT_ADD(mp, get_success, n_orig);
+ __MEMPOOL_STAT_ADD(mp, get_success, n);
- return 0;
+ return n;
ring_dequeue:
#endif /* RTE_MEMPOOL_CACHE_MAX_SIZE > 0 */
@@ -1004,7 +1004,7 @@ ring_dequeue:
if (ret < 0)
__MEMPOOL_STAT_ADD(mp, get_fail, n_orig);
else
- __MEMPOOL_STAT_ADD(mp, get_success, n_orig);
+ __MEMPOOL_STAT_ADD(mp, get_success, ret);
return ret;
}
--
2.1.0Keith Wiles, Principal Technologist with CTO office, Wind River mobile 972-213-5533
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-dev] [PATCH] Function __mempool_get_bulk() returns wrong count.
2014-09-27 18:41 [dpdk-dev] [PATCH] Function __mempool_get_bulk() returns wrong count Wiles, Roger Keith
@ 2014-09-28 0:38 ` Neil Horman
2014-09-28 22:25 ` Ananyev, Konstantin
1 sibling, 0 replies; 5+ messages in thread
From: Neil Horman @ 2014-09-28 0:38 UTC (permalink / raw)
To: Wiles, Roger Keith; +Cc: <dev@dpdk.org>
On Sat, Sep 27, 2014 at 06:41:41PM +0000, Wiles, Roger Keith wrote:
>
> When __mempool_get_bulk() grabs entries from the cache it
> returns zero instead of the number of entries obtained. Plus
> the stats were increased by the wrong count of objects.
>
> Signed-off-by: Keith Wiles <keith.wiles@windriver.com>
> ---
> lib/librte_mempool/rte_mempool.h | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
> index 299d4d7..6750e78 100644
> --- a/lib/librte_mempool/rte_mempool.h
> +++ b/lib/librte_mempool/rte_mempool.h
> @@ -988,9 +988,9 @@ __mempool_get_bulk(struct rte_mempool *mp, void **obj_table,
>
> cache->len -= n;
>
> - __MEMPOOL_STAT_ADD(mp, get_success, n_orig);
> + __MEMPOOL_STAT_ADD(mp, get_success, n);
>
> - return 0;
> + return n;
>
> ring_dequeue:
> #endif /* RTE_MEMPOOL_CACHE_MAX_SIZE > 0 */
> @@ -1004,7 +1004,7 @@ ring_dequeue:
> if (ret < 0)
> __MEMPOOL_STAT_ADD(mp, get_fail, n_orig);
> else
> - __MEMPOOL_STAT_ADD(mp, get_success, n_orig);
> + __MEMPOOL_STAT_ADD(mp, get_success, ret);
>
> return ret;
> }
> --
> 2.1.0Keith Wiles, Principal Technologist with CTO office, Wind River mobile 972-213-5533
>
>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-dev] [PATCH] Function __mempool_get_bulk() returns wrong count.
2014-09-27 18:41 [dpdk-dev] [PATCH] Function __mempool_get_bulk() returns wrong count Wiles, Roger Keith
2014-09-28 0:38 ` Neil Horman
@ 2014-09-28 22:25 ` Ananyev, Konstantin
2014-09-28 22:57 ` Wiles, Roger Keith
1 sibling, 1 reply; 5+ messages in thread
From: Ananyev, Konstantin @ 2014-09-28 22:25 UTC (permalink / raw)
To: Wiles, Roger Keith (Wind River), <dev@dpdk.org>
> -----Original Message-----
> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Wiles, Roger Keith
> Sent: Saturday, September 27, 2014 7:42 PM
> To: <dev@dpdk.org>
> Subject: [dpdk-dev] [PATCH] Function __mempool_get_bulk() returns wrong count.
>
>
> When __mempool_get_bulk() grabs entries from the cache it
> returns zero instead of the number of entries obtained. Plus
> the stats were increased by the wrong count of objects.
>
> Signed-off-by: Keith Wiles <keith.wiles@windriver.com>
> ---
> lib/librte_mempool/rte_mempool.h | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
> index 299d4d7..6750e78 100644
> --- a/lib/librte_mempool/rte_mempool.h
> +++ b/lib/librte_mempool/rte_mempool.h
> @@ -988,9 +988,9 @@ __mempool_get_bulk(struct rte_mempool *mp, void **obj_table,
>
> cache->len -= n;
>
> - __MEMPOOL_STAT_ADD(mp, get_success, n_orig);
> + __MEMPOOL_STAT_ADD(mp, get_success, n);
As I can see n == n_orig.
We can completely remove n_orig, but from other side - I don't see any harm here.
>
> - return 0;
> + return n;
As I can see, __mempool_get_bulk supposed to return 0,
if all n objects were allocated from mbuf, or a negative error code otherwise.
Check all usages of __mempool_get_bulk(), plus the fact that it does below:
ret = rte_ring_mc_dequeue_bulk(mp->ring, obj_table, n);
and rte_ring_mc_dequeue_bulk() is just wrapper for __rte_ring_mc_do_dequeue(..., n, RTE_RING_QUEUE_FIXED);
I.e. - either allocate all n objects, or return with failure.
So, yes we should return 0 here.
The only thing that probably needs to be done here: fix the comments.
Instead of:
- >=0: Success; number of objects supplied.
Something like:
- 0: Success; n objects supplied.
>
> ring_dequeue:
> #endif /* RTE_MEMPOOL_CACHE_MAX_SIZE > 0 */
> @@ -1004,7 +1004,7 @@ ring_dequeue:
> if (ret < 0)
> __MEMPOOL_STAT_ADD(mp, get_fail, n_orig);
> else
> - __MEMPOOL_STAT_ADD(mp, get_success, n_orig);
> + __MEMPOOL_STAT_ADD(mp, get_success, ret);
That seems incorrect tom me.
ret would be either 0 on success, or negative error value.
Konstantin
>
> return ret;
> }
> --
> 2.1.0Keith Wiles, Principal Technologist with CTO office, Wind River mobile 972-213-5533
As I can see
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-dev] [PATCH] Function __mempool_get_bulk() returns wrong count.
2014-09-28 22:25 ` Ananyev, Konstantin
@ 2014-09-28 22:57 ` Wiles, Roger Keith
2014-09-28 23:00 ` Ananyev, Konstantin
0 siblings, 1 reply; 5+ messages in thread
From: Wiles, Roger Keith @ 2014-09-28 22:57 UTC (permalink / raw)
To: ANANYEV, KONSTANTIN; +Cc: <dev@dpdk.org>
On Sep 28, 2014, at 5:25 PM, Ananyev, Konstantin <konstantin.ananyev@intel.com> wrote:
>
>
>> -----Original Message-----
>> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Wiles, Roger Keith
>> Sent: Saturday, September 27, 2014 7:42 PM
>> To: <dev@dpdk.org>
>> Subject: [dpdk-dev] [PATCH] Function __mempool_get_bulk() returns wrong count.
>>
>>
>> When __mempool_get_bulk() grabs entries from the cache it
>> returns zero instead of the number of entries obtained. Plus
>> the stats were increased by the wrong count of objects.
>>
>> Signed-off-by: Keith Wiles <keith.wiles@windriver.com>
>> ---
>> lib/librte_mempool/rte_mempool.h | 6 +++---
>> 1 file changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
>> index 299d4d7..6750e78 100644
>> --- a/lib/librte_mempool/rte_mempool.h
>> +++ b/lib/librte_mempool/rte_mempool.h
>> @@ -988,9 +988,9 @@ __mempool_get_bulk(struct rte_mempool *mp, void **obj_table,
>>
>> cache->len -= n;
>>
>> - __MEMPOOL_STAT_ADD(mp, get_success, n_orig);
>> + __MEMPOOL_STAT_ADD(mp, get_success, n);
>
> As I can see n == n_orig.
> We can completely remove n_orig, but from other side - I don't see any harm here.
In the RFC patch I sent I remove n_orig.
>
>>
>> - return 0;
>> + return n;
>
> As I can see, __mempool_get_bulk supposed to return 0,
> if all n objects were allocated from mbuf, or a negative error code otherwise.
> Check all usages of __mempool_get_bulk(), plus the fact that it does below:
> ret = rte_ring_mc_dequeue_bulk(mp->ring, obj_table, n);
> and rte_ring_mc_dequeue_bulk() is just wrapper for __rte_ring_mc_do_dequeue(..., n, RTE_RING_QUEUE_FIXED);
> I.e. - either allocate all n objects, or return with failure.
> So, yes we should return 0 here.
> The only thing that probably needs to be done here: fix the comments.
> Instead of:
> - >=0: Success; number of objects supplied.
> Something like:
> - 0: Success; n objects supplied.
>
>>
>> ring_dequeue:
>> #endif /* RTE_MEMPOOL_CACHE_MAX_SIZE > 0 */
>> @@ -1004,7 +1004,7 @@ ring_dequeue:
>> if (ret < 0)
>> __MEMPOOL_STAT_ADD(mp, get_fail, n_orig);
>> else
>> - __MEMPOOL_STAT_ADD(mp, get_success, n_orig);
>> + __MEMPOOL_STAT_ADD(mp, get_success, ret);
>
> That seems incorrect tom me.
> ret would be either 0 on success, or negative error value.
Notice ‘if (ret < 0)’ above so ret can not be negative in this case only zero or positive.
>
> Konstantin
>
>
>>
>> return ret;
>> }
>> --
>> 2.1.0Keith Wiles, Principal Technologist with CTO office, Wind River mobile 972-213-5533
>
>
> As I can see
Keith Wiles, Principal Technologist with CTO office, Wind River mobile 972-213-5533
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-dev] [PATCH] Function __mempool_get_bulk() returns wrong count.
2014-09-28 22:57 ` Wiles, Roger Keith
@ 2014-09-28 23:00 ` Ananyev, Konstantin
0 siblings, 0 replies; 5+ messages in thread
From: Ananyev, Konstantin @ 2014-09-28 23:00 UTC (permalink / raw)
To: Wiles, Roger Keith (Wind River); +Cc: <dev@dpdk.org>
> -----Original Message-----
> From: Wiles, Roger Keith [mailto:keith.wiles@windriver.com]
> Sent: Sunday, September 28, 2014 11:57 PM
> To: Ananyev, Konstantin
> Cc: <dev@dpdk.org>
> Subject: Re: [dpdk-dev] [PATCH] Function __mempool_get_bulk() returns wrong count.
>
>
> On Sep 28, 2014, at 5:25 PM, Ananyev, Konstantin <konstantin.ananyev@intel.com> wrote:
>
> >
> >
> >> -----Original Message-----
> >> From: dev [mailto:dev-bounces@dpdk.org] On Behalf Of Wiles, Roger Keith
> >> Sent: Saturday, September 27, 2014 7:42 PM
> >> To: <dev@dpdk.org>
> >> Subject: [dpdk-dev] [PATCH] Function __mempool_get_bulk() returns wrong count.
> >>
> >>
> >> When __mempool_get_bulk() grabs entries from the cache it
> >> returns zero instead of the number of entries obtained. Plus
> >> the stats were increased by the wrong count of objects.
> >>
> >> Signed-off-by: Keith Wiles <keith.wiles@windriver.com>
> >> ---
> >> lib/librte_mempool/rte_mempool.h | 6 +++---
> >> 1 file changed, 3 insertions(+), 3 deletions(-)
> >>
> >> diff --git a/lib/librte_mempool/rte_mempool.h b/lib/librte_mempool/rte_mempool.h
> >> index 299d4d7..6750e78 100644
> >> --- a/lib/librte_mempool/rte_mempool.h
> >> +++ b/lib/librte_mempool/rte_mempool.h
> >> @@ -988,9 +988,9 @@ __mempool_get_bulk(struct rte_mempool *mp, void **obj_table,
> >>
> >> cache->len -= n;
> >>
> >> - __MEMPOOL_STAT_ADD(mp, get_success, n_orig);
> >> + __MEMPOOL_STAT_ADD(mp, get_success, n);
> >
> > As I can see n == n_orig.
> > We can completely remove n_orig, but from other side - I don't see any harm here.
>
> In the RFC patch I sent I remove n_orig.
> >
> >>
> >> - return 0;
> >> + return n;
> >
> > As I can see, __mempool_get_bulk supposed to return 0,
> > if all n objects were allocated from mbuf, or a negative error code otherwise.
> > Check all usages of __mempool_get_bulk(), plus the fact that it does below:
> > ret = rte_ring_mc_dequeue_bulk(mp->ring, obj_table, n);
> > and rte_ring_mc_dequeue_bulk() is just wrapper for __rte_ring_mc_do_dequeue(..., n, RTE_RING_QUEUE_FIXED);
> > I.e. - either allocate all n objects, or return with failure.
> > So, yes we should return 0 here.
> > The only thing that probably needs to be done here: fix the comments.
> > Instead of:
> > - >=0: Success; number of objects supplied.
> > Something like:
> > - 0: Success; n objects supplied.
> >
> >>
> >> ring_dequeue:
> >> #endif /* RTE_MEMPOOL_CACHE_MAX_SIZE > 0 */
> >> @@ -1004,7 +1004,7 @@ ring_dequeue:
> >> if (ret < 0)
> >> __MEMPOOL_STAT_ADD(mp, get_fail, n_orig);
> >> else
> >> - __MEMPOOL_STAT_ADD(mp, get_success, n_orig);
> >> + __MEMPOOL_STAT_ADD(mp, get_success, ret);
> >
> > That seems incorrect tom me.
> > ret would be either 0 on success, or negative error value.
>
> Notice 'if (ret < 0)' above so ret can not be negative in this case only zero or positive.
It can't be positive here. Only zero.
See above why.
> >
> > Konstantin
> >
> >
> >>
> >> return ret;
> >> }
> >> --
> >> 2.1.0Keith Wiles, Principal Technologist with CTO office, Wind River mobile 972-213-5533
> >
> >
> > As I can see
>
> Keith Wiles, Principal Technologist with CTO office, Wind River mobile 972-213-5533
>
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2014-09-28 22:53 UTC | newest]
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2014-09-27 18:41 [dpdk-dev] [PATCH] Function __mempool_get_bulk() returns wrong count Wiles, Roger Keith
2014-09-28 0:38 ` Neil Horman
2014-09-28 22:25 ` Ananyev, Konstantin
2014-09-28 22:57 ` Wiles, Roger Keith
2014-09-28 23:00 ` Ananyev, Konstantin
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