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From: Gagandeep Singh <G.Singh@nxp.com>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: "gakhil@marvell.com" <gakhil@marvell.com>, "dev@dpdk.org" <dev@dpdk.org>
Subject: RE: [PATCH v2 3/7] examples/l2fwd-crypto: add signal handler for exit
Date: Wed, 18 May 2022 04:23:00 +0000
Message-ID: <AS8PR04MB81981E0DA1A12E35FED21FBDE1D19@AS8PR04MB8198.eurprd04.prod.outlook.com> (raw)
In-Reply-To: <20220517093212.71b8019c@hermes.local>

Hi,

> -----Original Message-----
> From: Stephen Hemminger <stephen@networkplumber.org>
> Sent: Tuesday, May 17, 2022 10:02 PM
> To: Gagandeep Singh <G.Singh@nxp.com>
> Cc: gakhil@marvell.com; dev@dpdk.org
> Subject: Re: [PATCH v2 3/7] examples/l2fwd-crypto: add signal handler for exit
> 
> On Tue, 17 May 2022 09:08:54 +0530
> Gagandeep Singh <g.singh@nxp.com> wrote:
> 
> > Handle SIGINT and SIGTERM signals.
> >
> > Signed-off-by: Gagandeep Singh <g.singh@nxp.com>
> > ---
> >  examples/l2fwd-crypto/main.c | 16 ++++++++++++++++
> >  1 file changed, 16 insertions(+)
> >
> > diff --git a/examples/l2fwd-crypto/main.c
> > b/examples/l2fwd-crypto/main.c index b1e2613ccf..0a1fc790fc 100644
> > --- a/examples/l2fwd-crypto/main.c
> > +++ b/examples/l2fwd-crypto/main.c
> > @@ -18,6 +18,7 @@
> >  #include <getopt.h>
> >  #include <fcntl.h>
> >  #include <unistd.h>
> > +#include <signal.h>
> >
> >  #include <rte_string_fns.h>
> >  #include <rte_branch_prediction.h>
> > @@ -256,6 +257,9 @@ struct l2fwd_crypto_statistics
> > crypto_statistics[RTE_CRYPTO_MAX_DEVS];
> >  #define MAX_TIMER_PERIOD 86400UL /* 1 day max */  #define
> > DEFAULT_TIMER_PERIOD 10UL
> >
> > +/* Global signal */
> > +unsigned int signal_received;
> 
> This won't work as expected.
> 
> This kind of flag needs to either be volatile or use explicit atomic builtins
> because the compiler and CPU are free to believe that it never changes.
> 
> Traditional way to address this would be:
> 
> static volatile bool signal_received;
> 
> More advanced way would be to use __atomic_load/store builtin.
> 
> Also printf() is not technically safe to call from a signal handler.

Ok, I will update it to "static volatile bool signal_received;" .

  reply	other threads:[~2022-05-18  4:23 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-25  4:14 [PATCH 1/8] app/test-crypto-perf: improve dequeue logic Gagandeep Singh
2022-04-25  4:14 ` [PATCH 2/8] app/test-crypto-perf: support SDAP for PDCP operations Gagandeep Singh
2022-05-13  9:49   ` [EXT] " Akhil Goyal
2022-04-25  4:14 ` [PATCH 3/8] examples/ipsec-secgw: support XCBC-MAC/DES-CBC Gagandeep Singh
2022-05-13  9:54   ` [EXT] " Akhil Goyal
2022-05-16  9:45     ` Gagandeep Singh
2022-04-25  4:14 ` [PATCH 4/8] examples/l2fwd-crypto: add signal handler for exit Gagandeep Singh
2022-04-25  4:14 ` [PATCH 5/8] test/crypto: fix pmd name for dpaa raw buffer crypto driver Gagandeep Singh
2022-04-25  4:14 ` [PATCH 6/8] test/crypto: support raw buffer APIs for PDCP Gagandeep Singh
2022-04-25  4:14 ` [PATCH 7/8] test/crypto: add external buffer test case Gagandeep Singh
2022-05-13 10:26   ` [EXT] " Akhil Goyal
2022-05-16  7:25     ` Gagandeep Singh
2022-04-25  4:14 ` [PATCH 8/8] test/crypto: add short MAC-I test vector for zuc Gagandeep Singh
2022-05-13 10:46   ` [EXT] " Akhil Goyal
2022-05-16  7:27     ` Gagandeep Singh
2022-05-13  9:46 ` [EXT] [PATCH 1/8] app/test-crypto-perf: improve dequeue logic Akhil Goyal
2022-05-16  7:14   ` Gagandeep Singh
2022-05-16  7:26     ` Anoob Joseph
2022-05-16  7:54       ` Gagandeep Singh
2022-05-17  3:38 ` [PATCH v2 0/7] Crypto related changes in sample/test apps Gagandeep Singh
2022-05-17  3:38   ` [PATCH v2 1/7] app/test-crypto-perf: support SDAP for PDCP operations Gagandeep Singh
2022-05-20  4:20     ` [PATCH v3 0/7] Crypto related changes in sample/test apps Gagandeep Singh
2022-05-20  4:20       ` [PATCH v3 1/7] app/test-crypto-perf: support SDAP for PDCP operations Gagandeep Singh
2022-05-26 13:52         ` [EXT] " Akhil Goyal
2022-05-30  4:31           ` Gagandeep Singh
2022-05-30  6:04             ` Akhil Goyal
2022-05-31 18:14               ` Akhil Goyal
2022-06-06  4:00         ` [PATCH v4] " Gagandeep Singh
2022-06-15 16:06           ` [EXT] " Akhil Goyal
2022-05-20  4:20       ` [PATCH v3 2/7] examples/ipsec-secgw: support XCBC-MAC/DES-CBC Gagandeep Singh
2022-05-26 13:54         ` [EXT] " Akhil Goyal
2022-05-20  4:21       ` [PATCH v3 3/7] examples/l2fwd-crypto: add signal handler for exit Gagandeep Singh
2022-05-26 13:55         ` [EXT] " Akhil Goyal
2022-05-20  4:21       ` [PATCH v3 4/7] test/crypto: fix PMD name for dpaa raw buffer crypto driver Gagandeep Singh
2022-05-26 13:56         ` [EXT] " Akhil Goyal
2022-05-20  4:21       ` [PATCH v3 5/7] test/crypto: support raw buffer APIs for PDCP Gagandeep Singh
2022-05-26 13:58         ` [EXT] " Akhil Goyal
2022-05-20  4:21       ` [PATCH v3 6/7] test/crypto: add short MAC-I test vector for zuc Gagandeep Singh
2022-05-26 13:59         ` [EXT] " Akhil Goyal
2022-05-20  4:21       ` [PATCH v3 7/7] doc: add missing authentication algorithm Gagandeep Singh
2022-05-26 14:00         ` [EXT] " Akhil Goyal
2022-05-17  3:38   ` [PATCH v2 2/7] examples/ipsec-secgw: support XCBC-MAC/DES-CBC Gagandeep Singh
2022-05-17  3:38   ` [PATCH v2 3/7] examples/l2fwd-crypto: add signal handler for exit Gagandeep Singh
2022-05-17 16:32     ` Stephen Hemminger
2022-05-18  4:23       ` Gagandeep Singh [this message]
2022-05-17  3:38   ` [PATCH v2 4/7] test/crypto: fix PMD name for dpaa raw buffer crypto driver Gagandeep Singh
2022-05-17  3:38   ` [PATCH v2 5/7] test/crypto: support raw buffer APIs for PDCP Gagandeep Singh
2022-05-17  3:38   ` [PATCH v2 6/7] test/crypto: add short MAC-I test vector for zuc Gagandeep Singh
2022-05-17  3:38   ` [PATCH v2 7/7] doc: add missing authentication algorithm Gagandeep Singh

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