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From: Tyler Retzlaff <roretzla@linux.microsoft.com>
To: dev@dpdk.org
Cc: "Bruce Richardson" <bruce.richardson@intel.com>,
	"Stephen Hemminger" <stephen@networkplumber.org>,
	"Thomas Monjalon" <thomas@monjalon.net>,
	"Morten Brørup" <mb@smartsharesystems.com>,
	"Tyler Retzlaff" <roretzla@linux.microsoft.com>
Subject: [PATCH 1/4] latencystats: use alloca instead of vla trivial
Date: Thu,  4 Apr 2024 10:15:10 -0700	[thread overview]
Message-ID: <1712250913-1977-2-git-send-email-roretzla@linux.microsoft.com> (raw)
In-Reply-To: <1712250913-1977-1-git-send-email-roretzla@linux.microsoft.com>

RFC sample illustrating simple conversion of VLA to alloca().

Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
---
 lib/latencystats/rte_latencystats.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/latencystats/rte_latencystats.c b/lib/latencystats/rte_latencystats.c
index 4ea9b0d..f59a9eb 100644
--- a/lib/latencystats/rte_latencystats.c
+++ b/lib/latencystats/rte_latencystats.c
@@ -159,7 +159,7 @@ struct latency_stats_nameoff {
 {
 	unsigned int i, cnt = 0;
 	uint64_t now;
-	float latency[nb_pkts];
+	float *latency = alloca(sizeof(float) * nb_pkts);
 	static float prev_latency;
 	/*
 	 * Alpha represents degree of weighting decrease in EWMA,
-- 
1.8.3.1


  reply	other threads:[~2024-04-04 17:15 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-07 19:32 RFC acceptable handling of VLAs across toolchains Tyler Retzlaff
2023-11-08  2:31 ` Stephen Hemminger
2023-11-08  3:25   ` Tyler Retzlaff
2023-11-08  8:19     ` Morten Brørup
2023-11-08 16:51 ` Stephen Hemminger
2023-11-08 17:48   ` Morten Brørup
2023-11-09 10:25     ` RFC: default burst sizes in rte_config Morten Brørup
2023-11-09 20:26   ` RFC acceptable handling of VLAs across toolchains Tyler Retzlaff
2024-03-21  0:12     ` Tyler Retzlaff
2024-04-04 17:15 ` [PATCH 0/4] RFC samples converting VLA to alloca Tyler Retzlaff
2024-04-04 17:15   ` Tyler Retzlaff [this message]
2024-04-06 15:28     ` [PATCH 1/4] latencystats: use alloca instead of vla trivial Morten Brørup
2024-04-07  9:36       ` Mattias Rönnblom
2024-04-07 17:00         ` Stephen Hemminger
2024-04-04 17:15   ` [PATCH 2/4] hash: " Tyler Retzlaff
2024-04-06 16:01     ` Morten Brørup
2024-04-04 17:15   ` [PATCH 3/4] vhost: use alloca instead of vla sizeof Tyler Retzlaff
2024-04-06 22:30     ` Morten Brørup
2024-04-04 17:15   ` [PATCH 4/4] dispatcher: use alloca instead of vla multi dimensional Tyler Retzlaff
2024-04-06 15:49     ` Morten Brørup
2024-04-07  9:31   ` [PATCH 0/4] RFC samples converting VLA to alloca Mattias Rönnblom
2024-04-07 11:07     ` Morten Brørup
2024-04-07 17:03       ` Stephen Hemminger
2024-04-08 15:27         ` Tyler Retzlaff
2024-04-08 15:53           ` Morten Brørup
2024-04-09  8:28             ` Konstantin Ananyev
2024-04-09 15:08               ` Tyler Retzlaff
2024-04-10  9:58                 ` Konstantin Ananyev
2024-04-10 17:03                   ` Tyler Retzlaff
2024-04-10  7:32             ` Mattias Rönnblom
2024-04-10  7:52               ` Morten Brørup
2024-04-10 17:04               ` Tyler Retzlaff
2024-04-10  7:27           ` Mattias Rönnblom
2024-04-10 17:10             ` Tyler Retzlaff

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