From: Suanming Mou Date: Wed, 15 May 2019 05:10:39 +0000 (+0000) Subject: app/pdump: exit with primary process X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=a99a311ba101ea7ebde256732bf65f512882d2b6;p=dpdk.git app/pdump: exit with primary process The pdump tool works as the secondary process. When the primary process exits and the residual secondary process keeps running, it will make the primary process can't start up again. Since the ex-fbarry files are still attached by the secondary process pdump, the 'new' primary process can't get these files locked. The patch is to set up an alarm which runs every 0.5s periodically to monitor the primary process in the pdump. Once the primary exits, so will the pdump. Signed-off-by: Suanming Mou Reviewed-by: Anatoly Burakov Acked-by: Reshma Pattan --- diff --git a/app/pdump/main.c b/app/pdump/main.c index cd0986aee8..c1b901279f 100644 --- a/app/pdump/main.c +++ b/app/pdump/main.c @@ -13,6 +13,7 @@ #include #include +#include #include #include #include @@ -65,6 +66,8 @@ #define SIZE 256 #define BURST_SIZE 32 #define NUM_VDEVS 2 +/* Maximum delay for exiting after primary process. */ +#define MONITOR_INTERVAL (500 * 1000) /* true if x is a power of 2 */ #define POWEROF2(x) ((((x)-1) & (x)) == 0) @@ -412,6 +415,21 @@ launch_args_parse(int argc, char **argv, char *prgname) return 0; } +static void +monitor_primary(void *arg __rte_unused) +{ + if (quit_signal) + return; + + if (rte_eal_primary_proc_alive(NULL)) { + rte_eal_alarm_set(MONITOR_INTERVAL, monitor_primary, NULL); + return; + } + + printf("Primary process is no longer active, exiting...\n"); + quit_signal = 1; +} + static void print_pdump_stats(void) { @@ -536,6 +554,21 @@ cleanup_pdump_resources(void) cleanup_rings(); } +static void +disable_primary_monitor(void) +{ + int ret; + + /* + * Cancel monitoring of primary process. + * There will be no error if no alarm is set + * (in case primary process kill was detected earlier). + */ + ret = rte_eal_alarm_cancel(monitor_primary, NULL); + if (ret < 0) + printf("Fail to disable monitor:%d\n", ret); +} + static void signal_handler(int sig_num) { @@ -910,6 +943,17 @@ dump_packets(void) ; } +static void +enable_primary_monitor(void) +{ + int ret; + + /* Once primary exits, so will pdump. */ + ret = rte_eal_alarm_set(MONITOR_INTERVAL, monitor_primary, NULL); + if (ret < 0) + printf("Fail to enable monitor:%d\n", ret); +} + int main(int argc, char **argv) { @@ -953,8 +997,10 @@ main(int argc, char **argv) /* create mempool, ring and vdevs info */ create_mp_ring_vdev(); enable_pdump(); + enable_primary_monitor(); dump_packets(); + disable_primary_monitor(); cleanup_pdump_resources(); /* dump debug stats */ print_pdump_stats(); diff --git a/doc/guides/rel_notes/release_19_08.rst b/doc/guides/rel_notes/release_19_08.rst index ac496b37a1..4a1fd8dd8a 100644 --- a/doc/guides/rel_notes/release_19_08.rst +++ b/doc/guides/rel_notes/release_19_08.rst @@ -204,6 +204,10 @@ New Features Added telemetry mode to l3fwd-power application to report application level busyness, empty and full polls of rte_eth_rx_burst(). +* **Updated the pdump application.** + + Add support for pdump to exit with primary process. + Removed Items ------------- diff --git a/doc/guides/tools/pdump.rst b/doc/guides/tools/pdump.rst index 53cd2b464c..8a499c6c5b 100644 --- a/doc/guides/tools/pdump.rst +++ b/doc/guides/tools/pdump.rst @@ -26,6 +26,9 @@ a DPDK secondary process and is capable of enabling packet capture on dpdk ports Once the libpcap development files are installed, the libpcap based PMD can be enabled by setting CONFIG_RTE_LIBRTE_PMD_PCAP=y and recompiling the DPDK. + * The ``dpdk-pdump`` tool runs as a DPDK secondary process. It exits when + the primary application exits. + Running the Application -----------------------