From: Stephen Hemminger <stephen@networkplumber.org>
To: Junlong Wang <wang.junlong1@zte.com.cn>
Cc: dev@dpdk.org
Subject: Re: [PATCH v1 1/5] net/zxdh: add support for modifying queue depth
Date: Wed, 31 Dec 2025 11:15:29 -0800 [thread overview]
Message-ID: <20251231111529.790c7d99@phoenix.local> (raw)
In-Reply-To: <20251220061521.289722-2-wang.junlong1@zte.com.cn>
On Sat, 20 Dec 2025 14:15:17 +0800
Junlong Wang <wang.junlong1@zte.com.cn> wrote:
>
> +static unsigned int
> +log2above(unsigned int v)
> +{
> + unsigned int l;
> + unsigned int r;
> +
> + for (l = 0, r = 0; (v >> 1); ++l, v >>= 1)
> + r |= (v & 1);
> + return l + r;
> +}
> +
It is only used during initalization so performance is not a big issue,
but this could could be optimized by using the compiler builtins.
static uint32_t
log2above(uint32_t v)
{
if (v <= 1)
return 0;
return 32 - __rte_clz32(v - 1);
}
Will merge as is.
next prev parent reply other threads:[~2025-12-31 19:15 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-20 6:15 [PATCH v1 0/5] net/zxdh: add support some new features Junlong Wang
2025-12-20 6:15 ` [PATCH v1 1/5] net/zxdh: add support for modifying queue depth Junlong Wang
2025-12-31 19:15 ` Stephen Hemminger [this message]
2025-12-20 6:15 ` [PATCH v1 2/5] net/zxdh: optimize alloc queue resources Junlong Wang
2025-12-20 6:15 ` [PATCH v1 3/5] net/zxdh: add support set link speed get autoneg stats Junlong Wang
2025-12-21 16:57 ` Stephen Hemminger
2025-12-31 19:23 ` Stephen Hemminger
2025-12-31 19:24 ` Stephen Hemminger
2025-12-31 19:27 ` Stephen Hemminger
2025-12-20 6:15 ` [PATCH v1 4/5] net/zxdh: add support primary/secondary process Junlong Wang
2025-12-21 17:00 ` Stephen Hemminger
2025-12-23 10:55 ` Junlong Wang
2025-12-23 17:54 ` Stephen Hemminger
2025-12-20 6:15 ` [PATCH v1 5/5] net/zxdh: add support GENEVE TSO and Rx outer UDP chksum Junlong Wang
2026-01-05 7:16 ` [PATCH v2 0/5] net/zxdh: add support some new features Junlong Wang
2026-01-05 7:16 ` [PATCH v2 1/5] net/zxdh: add support for modifying queue depth Junlong Wang
2026-01-05 7:16 ` [PATCH v2 2/5] net/zxdh: optimize alloc queue resources Junlong Wang
2026-01-05 7:16 ` [PATCH v2 3/5] net/zxdh: add support set link speed get autoneg stats Junlong Wang
2026-01-05 7:16 ` [PATCH v2 4/5] net/zxdh: add support primary/secondary process Junlong Wang
2026-01-05 7:16 ` [PATCH v2 5/5] net/zxdh: add support GENEVE TSO and Rx outer chksum Junlong Wang
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