* [PATCH] mempool: add cache guard to per-lcore debug statistics
@ 2023-09-04 9:10 Morten Brørup
2023-09-29 18:32 ` Morten Brørup
2023-09-30 6:24 ` Andrew Rybchenko
0 siblings, 2 replies; 4+ messages in thread
From: Morten Brørup @ 2023-09-04 9:10 UTC (permalink / raw)
To: thomas, david.marchand, olivier.matz, andrew.rybchenko,
bruce.richardson, mattias.ronnblom
Cc: honnappa.nagarahalli, konstantin.v.ananyev, dev, Morten Brørup
The per-lcore debug statistics, if enabled, are frequently written by
their individual lcores, so add a cache guard to prevent CPU cache
thrashing.
Depends-on: series-29415 ("clarify purpose of empty cache lines")
Signed-off-by: Morten Brørup <mb@smartsharesystems.com>
---
lib/mempool/rte_mempool.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/lib/mempool/rte_mempool.h b/lib/mempool/rte_mempool.h
index a05b25d5b9..f70bf36080 100644
--- a/lib/mempool/rte_mempool.h
+++ b/lib/mempool/rte_mempool.h
@@ -78,6 +78,7 @@ struct rte_mempool_debug_stats {
uint64_t get_fail_objs; /**< Objects that failed to be allocated. */
uint64_t get_success_blks; /**< Successful allocation number of contiguous blocks. */
uint64_t get_fail_blks; /**< Failed allocation number of contiguous blocks. */
+ RTE_CACHE_GUARD;
} __rte_cache_aligned;
#endif
--
2.17.1
^ permalink raw reply [flat|nested] 4+ messages in thread
* RE: [PATCH] mempool: add cache guard to per-lcore debug statistics
2023-09-04 9:10 [PATCH] mempool: add cache guard to per-lcore debug statistics Morten Brørup
@ 2023-09-29 18:32 ` Morten Brørup
2023-09-30 6:24 ` Andrew Rybchenko
1 sibling, 0 replies; 4+ messages in thread
From: Morten Brørup @ 2023-09-29 18:32 UTC (permalink / raw)
To: Olivier Matz, Andrew Rybchenko
Cc: honnappa.nagarahalli, konstantin.v.ananyev, dev, thomas,
david.marchand, bruce.richardson, mattias.ronnblom
PING for review.
> From: Morten Brørup [mailto:mb@smartsharesystems.com]
> Sent: Monday, 4 September 2023 11.10
>
> The per-lcore debug statistics, if enabled, are frequently written by
> their individual lcores, so add a cache guard to prevent CPU cache
> thrashing.
>
> Depends-on: series-29415 ("clarify purpose of empty cache lines")
>
> Signed-off-by: Morten Brørup <mb@smartsharesystems.com>
> ---
> lib/mempool/rte_mempool.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/lib/mempool/rte_mempool.h b/lib/mempool/rte_mempool.h
> index a05b25d5b9..f70bf36080 100644
> --- a/lib/mempool/rte_mempool.h
> +++ b/lib/mempool/rte_mempool.h
> @@ -78,6 +78,7 @@ struct rte_mempool_debug_stats {
> uint64_t get_fail_objs; /**< Objects that failed to be
> allocated. */
> uint64_t get_success_blks; /**< Successful allocation number
> of contiguous blocks. */
> uint64_t get_fail_blks; /**< Failed allocation number of
> contiguous blocks. */
> + RTE_CACHE_GUARD;
> } __rte_cache_aligned;
> #endif
>
> --
> 2.17.1
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] mempool: add cache guard to per-lcore debug statistics
2023-09-04 9:10 [PATCH] mempool: add cache guard to per-lcore debug statistics Morten Brørup
2023-09-29 18:32 ` Morten Brørup
@ 2023-09-30 6:24 ` Andrew Rybchenko
2023-10-11 21:28 ` Thomas Monjalon
1 sibling, 1 reply; 4+ messages in thread
From: Andrew Rybchenko @ 2023-09-30 6:24 UTC (permalink / raw)
To: Morten Brørup, thomas, david.marchand, olivier.matz,
bruce.richardson, mattias.ronnblom
Cc: honnappa.nagarahalli, konstantin.v.ananyev, dev
On 9/4/23 12:10, Morten Brørup wrote:
> The per-lcore debug statistics, if enabled, are frequently written by
> their individual lcores, so add a cache guard to prevent CPU cache
> thrashing.
>
> Depends-on: series-29415 ("clarify purpose of empty cache lines")
>
> Signed-off-by: Morten Brørup <mb@smartsharesystems.com>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] mempool: add cache guard to per-lcore debug statistics
2023-09-30 6:24 ` Andrew Rybchenko
@ 2023-10-11 21:28 ` Thomas Monjalon
0 siblings, 0 replies; 4+ messages in thread
From: Thomas Monjalon @ 2023-10-11 21:28 UTC (permalink / raw)
To: Morten Brørup
Cc: david.marchand, olivier.matz, bruce.richardson, mattias.ronnblom,
dev, honnappa.nagarahalli, konstantin.v.ananyev, dev,
Andrew Rybchenko
30/09/2023 08:24, Andrew Rybchenko:
> On 9/4/23 12:10, Morten Brørup wrote:
> > The per-lcore debug statistics, if enabled, are frequently written by
> > their individual lcores, so add a cache guard to prevent CPU cache
> > thrashing.
> >
> > Depends-on: series-29415 ("clarify purpose of empty cache lines")
> >
> > Signed-off-by: Morten Brørup <mb@smartsharesystems.com>
>
> Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Applied, thanks.
^ permalink raw reply [flat|nested] 4+ messages in thread
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2023-09-04 9:10 [PATCH] mempool: add cache guard to per-lcore debug statistics Morten Brørup
2023-09-29 18:32 ` Morten Brørup
2023-09-30 6:24 ` Andrew Rybchenko
2023-10-11 21:28 ` Thomas Monjalon
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