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Date: Mon, 10 Nov 2014 13:06:41 +0000
From: Bruce Richardson <bruce.richardson@intel.com>
To: Qinglai Xiao <jigsaw@gmail.com>
Message-ID: <20141110130641.GA12532@bricha3-MOBL3>
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Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v2 1/2] Add new union field usr in mbuf->hash.
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On Mon, Nov 10, 2014 at 02:52:46PM +0200, Qinglai Xiao wrote:
> This field is added for librte_distributor. User of librte_distributor
> is advocated to set value of mbuf->hash.usr before calling
> rte_distributor_process. The value of usr is the tag which stands as
> identifier of flow.
>
> Signed-off-by: Qinglai Xiao <jigsaw@gmail.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
> ---
> app/test/test_distributor.c | 18 +++++++++---------
> app/test/test_distributor_perf.c | 4 ++--
> lib/librte_distributor/rte_distributor.c | 2 +-
> lib/librte_mbuf/rte_mbuf.h | 1 +
> 4 files changed, 13 insertions(+), 12 deletions(-)
>
> diff --git a/app/test/test_distributor.c b/app/test/test_distributor.c
> index ce06436..9e8c06d 100644
> --- a/app/test/test_distributor.c
> +++ b/app/test/test_distributor.c
> @@ -120,7 +120,7 @@ sanity_test(struct rte_distributor *d, struct rte_mempool *p)
> /* now set all hash values in all buffers to zero, so all pkts go to the
> * one worker thread */
> for (i = 0; i < BURST; i++)
> - bufs[i]->hash.rss = 0;
> + bufs[i]->hash.usr = 0;
>
> rte_distributor_process(d, bufs, BURST);
> rte_distributor_flush(d);
> @@ -142,7 +142,7 @@ sanity_test(struct rte_distributor *d, struct rte_mempool *p)
> if (rte_lcore_count() >= 3) {
> clear_packet_count();
> for (i = 0; i < BURST; i++)
> - bufs[i]->hash.rss = (i & 1) << 8;
> + bufs[i]->hash.usr = (i & 1) << 8;
>
> rte_distributor_process(d, bufs, BURST);
> rte_distributor_flush(d);
> @@ -167,7 +167,7 @@ sanity_test(struct rte_distributor *d, struct rte_mempool *p)
> * so load gets distributed */
> clear_packet_count();
> for (i = 0; i < BURST; i++)
> - bufs[i]->hash.rss = i;
> + bufs[i]->hash.usr = i;
>
> rte_distributor_process(d, bufs, BURST);
> rte_distributor_flush(d);
> @@ -199,7 +199,7 @@ sanity_test(struct rte_distributor *d, struct rte_mempool *p)
> return -1;
> }
> for (i = 0; i < BIG_BATCH; i++)
> - many_bufs[i]->hash.rss = i << 2;
> + many_bufs[i]->hash.usr = i << 2;
>
> for (i = 0; i < BIG_BATCH/BURST; i++) {
> rte_distributor_process(d, &many_bufs[i*BURST], BURST);
> @@ -280,7 +280,7 @@ sanity_test_with_mbuf_alloc(struct rte_distributor *d, struct rte_mempool *p)
> while (rte_mempool_get_bulk(p, (void *)bufs, BURST) < 0)
> rte_distributor_process(d, NULL, 0);
> for (j = 0; j < BURST; j++) {
> - bufs[j]->hash.rss = (i+j) << 1;
> + bufs[j]->hash.usr = (i+j) << 1;
> rte_mbuf_refcnt_set(bufs[j], 1);
> }
>
> @@ -359,7 +359,7 @@ sanity_test_with_worker_shutdown(struct rte_distributor *d,
> /* now set all hash values in all buffers to zero, so all pkts go to the
> * one worker thread */
> for (i = 0; i < BURST; i++)
> - bufs[i]->hash.rss = 0;
> + bufs[i]->hash.usr = 0;
>
> rte_distributor_process(d, bufs, BURST);
> /* at this point, we will have processed some packets and have a full
> @@ -372,7 +372,7 @@ sanity_test_with_worker_shutdown(struct rte_distributor *d,
> return -1;
> }
> for (i = 0; i < BURST; i++)
> - bufs[i]->hash.rss = 0;
> + bufs[i]->hash.usr = 0;
>
> /* get worker zero to quit */
> zero_quit = 1;
> @@ -416,7 +416,7 @@ test_flush_with_worker_shutdown(struct rte_distributor *d,
> /* now set all hash values in all buffers to zero, so all pkts go to the
> * one worker thread */
> for (i = 0; i < BURST; i++)
> - bufs[i]->hash.rss = 0;
> + bufs[i]->hash.usr = 0;
>
> rte_distributor_process(d, bufs, BURST);
> /* at this point, we will have processed some packets and have a full
> @@ -488,7 +488,7 @@ quit_workers(struct rte_distributor *d, struct rte_mempool *p)
> zero_quit = 0;
> quit = 1;
> for (i = 0; i < num_workers; i++)
> - bufs[i]->hash.rss = i << 1;
> + bufs[i]->hash.usr = i << 1;
> rte_distributor_process(d, bufs, num_workers);
>
> rte_mempool_put_bulk(p, (void *)bufs, num_workers);
> diff --git a/app/test/test_distributor_perf.c b/app/test/test_distributor_perf.c
> index b04864c..48ee344 100644
> --- a/app/test/test_distributor_perf.c
> +++ b/app/test/test_distributor_perf.c
> @@ -159,7 +159,7 @@ perf_test(struct rte_distributor *d, struct rte_mempool *p)
> }
> /* ensure we have different hash value for each pkt */
> for (i = 0; i < BURST; i++)
> - bufs[i]->hash.rss = i;
> + bufs[i]->hash.usr = i;
>
> start = rte_rdtsc();
> for (i = 0; i < (1<<ITER_POWER); i++)
> @@ -198,7 +198,7 @@ quit_workers(struct rte_distributor *d, struct rte_mempool *p)
>
> quit = 1;
> for (i = 0; i < num_workers; i++)
> - bufs[i]->hash.rss = i << 1;
> + bufs[i]->hash.usr = i << 1;
> rte_distributor_process(d, bufs, num_workers);
>
> rte_mempool_put_bulk(p, (void *)bufs, num_workers);
> diff --git a/lib/librte_distributor/rte_distributor.c b/lib/librte_distributor/rte_distributor.c
> index 656ee5c..3dfec4a 100644
> --- a/lib/librte_distributor/rte_distributor.c
> +++ b/lib/librte_distributor/rte_distributor.c
> @@ -289,7 +289,7 @@ rte_distributor_process(struct rte_distributor *d,
> * use the zero-value to indicate that no packet is
> * being processed by a worker.
> */
> - new_tag = (next_mb->hash.rss | 1);
> + new_tag = (next_mb->hash.usr | 1);
>
> uint32_t match = 0;
> unsigned i;
> diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
> index e8f9bfc..f5f8658 100644
> --- a/lib/librte_mbuf/rte_mbuf.h
> +++ b/lib/librte_mbuf/rte_mbuf.h
> @@ -185,6 +185,7 @@ struct rte_mbuf {
> uint16_t id;
> } fdir; /**< Filter identifier if FDIR enabled */
> uint32_t sched; /**< Hierarchical scheduler */
> + uint32_t usr; /**< User defined tags. See @rte_distributor_process */
> } hash; /**< hash information */
>
> /* second cache line - fields only used in slow path or on TX */
> --
> 1.7.1
>