On Tue, Dec 16, 2014 at 09:26:48AM +0000, Chi, Xiaobo (NSN - CN/Hangzhou) wrote: > Hi, Bruce, > How about this patch, can it be merged to master branch? Thanks. > > Brgs, > Chi Xiaobo >
At this point, I think we are well past code-freeze for new features for 1.8, but this looks a good candidate for 2.0 once the merge window for that opens. /Bruce > > -----Original Message----- > From: Chi, Xiaobo (NSN - CN/Hangzhou) > Sent: Monday, December 15, 2014 5:58 PM > To: 'ext Hiroshi Shimamoto'; dev at dpdk.org > Subject: RE: [dpdk-dev] [PATCH v2] add one option memory-only for secondary > processes > > Hi, Hiroshi, > Yes, the should be performance degradation, not only due to the mempool > cache, but also due to process scheduling overhead (lead by no CPU pin.) > I have not done the performance testing. In my project scenarios, those > SECONDARY processes only send/receive messages to/from the PRIMARY process > via mempool/ring, the throughput is not so high, so the performance > degradation is not critical to us. but there are dozens of SECONDARY > processes in our system, it will be hard to manually properly pin them to > different CPU cores, what we want is to apply linux standard scheduling > mechanism to do load balance between CPU cores. > > Brgs, > Chi Xiaobo > > > -----Original Message----- > From: ext Hiroshi Shimamoto [mailto:h-shimamoto at ct.jp.nec.com] > Sent: Thursday, December 11, 2014 11:03 AM > To: Chi, Xiaobo (NSN - CN/Hangzhou); dev at dpdk.org > Subject: RE: [dpdk-dev] [PATCH v2] add one option memory-only for secondary > processes > > Hi, > > sorry for the delay. > > > Subject: RE: [dpdk-dev] [PATCH v2] add one option memory-only for secondary > > processes > > > > Hi, Hiroshi, > > Yes, you are right, in order to avoid such problem, while create the > > mempool, which shall be shared between the primary > > process and those secondary Processes, we need to assign the cache_size > > param value to be zero. And in order to make the > > system more stable, it's better to define the RTE_MEMPOOL_CACHE_MAX_SIZE to > > be 0 in rte_config.h. > > Yes, it prevents the data corruption, but it also hurts the performance. > I think, if we use the mbuf w/o cache for PMD, we will see the performance > degradation. > > Don't you have any number? > > thanks, > Hiroshi > > > > > /* create the mempool */ > > struct rte_mempool * > > rte_mempool_create(const char *name, unsigned n, unsigned elt_size, > > unsigned cache_size, unsigned private_data_size, > > rte_mempool_ctor_t *mp_init, void *mp_init_arg, > > rte_mempool_obj_ctor_t *obj_init, void *obj_init_arg, > > int socket_id, unsigned flags); > > > > > > Brgs, > > Chi xiaobo > > > > > > -----Original Message----- > > From: ext Hiroshi Shimamoto [mailto:h-shimamoto at ct.jp.nec.com] > > Sent: Wednesday, December 03, 2014 6:54 PM > > To: Chi, Xiaobo (NSN - CN/Hangzhou); dev at dpdk.org > > Subject: RE: [dpdk-dev] [PATCH v2] add one option memory-only for secondary > > processes > > > > Hi, > > > > > Subject: [dpdk-dev] [PATCH v2] add one option memory-only for secondary > > > processes > > > > > > From: Chi Xiaobo <xiaobo.chi at nsn.com> > > > > > > Problem: There is one normal DPDK processes deployment scenarios: one > > > primary process and several (even hundreds) secondary > > > processes; all outside packets/messages are sent/received by primary > > > process and then distribute them to those secondary > > > processes by DPDK's ring/sharedmemory mechanism. In such scenarios, those > > > SECONDARY processes need only hugepage based > > > sharememory mechanism and it???s upper libs (such as ring, mempool, > > > etc.), they need not cpu core pinning, iopl privilege > > > changing , pci device, timer, alarm, interrupt, shared_driver_list, > > > core_info, threads for each core, etc. Then, for > > > such kind of SECONDARY processes, the current rte_eal_init() is too heavy. > > > > > > Solution:One new EAL initializing argument, --memory-only, is added. It > > > is only for those SECONDARY processes which > > only > > > want to share memory with other processes. if this argument is defined, > > > users need not define those mandatory arguments, > > > such as -c and -n, due to we don't want to pin such kind of processes to > > > any CPUs. > > > > however, we need the lcore_id per thread to use mempool. > > If the lcore_id is not initialized, it must be 0, and multiple threads will > > break > > mempool caches per thread, because of race condition. > > We have to assign lcore_id per thread, these ids must not be overlapped, or > > disable > > mempool handling in SECONDARY process. > > > > thanks, > > Hiroshi > > > > > Signed-off-by: Chi Xiaobo <xiaobo.chi at nsn.com> > > > --- > > > lib/librte_eal/common/eal_common_options.c | 17 ++++++++++++--- > > > lib/librte_eal/common/eal_internal_cfg.h | 1 + > > > lib/librte_eal/common/eal_options.h | 2 ++ > > > lib/librte_eal/linuxapp/eal/eal.c | 34 > > > +++++++++++++++++------------- > > > 4 files changed, 36 insertions(+), 18 deletions(-) > > > > > > diff --git a/lib/librte_eal/common/eal_common_options.c > > > b/lib/librte_eal/common/eal_common_options.c > > > index e2810ab..7b18498 100644 > > > --- a/lib/librte_eal/common/eal_common_options.c > > > +++ b/lib/librte_eal/common/eal_common_options.c > > > @@ -85,6 +85,7 @@ eal_long_options[] = { > > > {OPT_XEN_DOM0, 0, 0, OPT_XEN_DOM0_NUM}, > > > {OPT_CREATE_UIO_DEV, 1, NULL, OPT_CREATE_UIO_DEV_NUM}, > > > {OPT_VFIO_INTR, 1, NULL, OPT_VFIO_INTR_NUM}, > > > + {OPT_MEMORY_ONLY, 0, NULL, OPT_MEMORY_ONLY_NUM}, > > > {0, 0, 0, 0} > > > }; > > > > > > @@ -126,6 +127,7 @@ eal_reset_internal_config(struct internal_config > > > *internal_cfg) > > > internal_cfg->no_hpet = 1; > > > #endif > > > internal_cfg->vmware_tsc_map = 0; > > > + internal_cfg->memory_only= 0; > > > } > > > > > > /* > > > @@ -454,6 +456,10 @@ eal_parse_common_option(int opt, const char *optarg, > > > conf->process_type = eal_parse_proc_type(optarg); > > > break; > > > > > > + case OPT_MEMORY_ONLY_NUM: > > > + conf->memory_only= 1; > > > + break; > > > + > > > case OPT_MASTER_LCORE_NUM: > > > if (eal_parse_master_lcore(optarg) < 0) { > > > RTE_LOG(ERR, EAL, "invalid parameter for --" > > > @@ -525,9 +531,9 @@ eal_check_common_options(struct internal_config > > > *internal_cfg) > > > { > > > struct rte_config *cfg = rte_eal_get_configuration(); > > > > > > - if (!lcores_parsed) { > > > - RTE_LOG(ERR, EAL, "CPU cores must be enabled with options " > > > - "-c or -l\n"); > > > + if (!lcores_parsed && !(internal_cfg->process_type == > > > RTE_PROC_SECONDARY&& internal_cfg->memory_only) ) { > > > + RTE_LOG(ERR, EAL, "For those processes without memory-only > > > option, CPU cores " > > > + "must be enabled with > > > options -c or -l\n"); > > > return -1; > > > } > > > if (cfg->lcore_role[cfg->master_lcore] != ROLE_RTE) { > > > @@ -545,6 +551,10 @@ eal_check_common_options(struct internal_config > > > *internal_cfg) > > > "specified\n"); > > > return -1; > > > } > > > + if ( internal_cfg->process_type != RTE_PROC_SECONDARY && > > > internal_cfg->memory_only ) { > > > + RTE_LOG(ERR, EAL, "only secondary processes can specify > > > memory-only option.\n"); > > > + return -1; > > > + } > > > if (index(internal_cfg->hugefile_prefix, '%') != NULL) { > > > RTE_LOG(ERR, EAL, "Invalid char, '%%', in --"OPT_FILE_PREFIX" " > > > "option\n"); > > > @@ -590,6 +600,7 @@ eal_common_usage(void) > > > " --"OPT_SYSLOG" : set syslog facility\n" > > > " --"OPT_LOG_LEVEL" : set default log level\n" > > > " --"OPT_PROC_TYPE" : type of this process\n" > > > + " --"OPT_MEMORY_ONLY": only use shared memory, valid only for > > > secondary process.\n" > > > " --"OPT_PCI_BLACKLIST", -b: add a PCI device in black list.\n" > > > " Prevent EAL from using this PCI device. The > > > argument\n" > > > " format is <domain:bus:devid.func>.\n" > > > diff --git a/lib/librte_eal/common/eal_internal_cfg.h > > > b/lib/librte_eal/common/eal_internal_cfg.h > > > index aac6abf..f51f0a2 100644 > > > --- a/lib/librte_eal/common/eal_internal_cfg.h > > > +++ b/lib/librte_eal/common/eal_internal_cfg.h > > > @@ -85,6 +85,7 @@ struct internal_config { > > > > > > unsigned num_hugepage_sizes; /**< how many sizes on this system */ > > > struct hugepage_info hugepage_info[MAX_HUGEPAGE_SIZES]; > > > + volatile unsigned memory_only; /**<wheter the seconday process only > > > need shared momory only or not */ > > > }; > > > extern struct internal_config internal_config; /**< Global EAL > > > configuration. */ > > > > > > diff --git a/lib/librte_eal/common/eal_options.h > > > b/lib/librte_eal/common/eal_options.h > > > index e476f8d..87cc5db 100644 > > > --- a/lib/librte_eal/common/eal_options.h > > > +++ b/lib/librte_eal/common/eal_options.h > > > @@ -77,6 +77,8 @@ enum { > > > OPT_CREATE_UIO_DEV_NUM, > > > #define OPT_VFIO_INTR "vfio-intr" > > > OPT_VFIO_INTR_NUM, > > > +#define OPT_MEMORY_ONLY "memory-only" > > > + OPT_MEMORY_ONLY_NUM, > > > OPT_LONG_MAX_NUM > > > }; > > > > > > diff --git a/lib/librte_eal/linuxapp/eal/eal.c > > > b/lib/librte_eal/linuxapp/eal/eal.c > > > index 89f3b5e..c160771 100644 > > > --- a/lib/librte_eal/linuxapp/eal/eal.c > > > +++ b/lib/librte_eal/linuxapp/eal/eal.c > > > @@ -752,14 +752,6 @@ rte_eal_init(int argc, char **argv) > > > > > > rte_config_init(); > > > > > > - if (rte_eal_pci_init() < 0) > > > - rte_panic("Cannot init PCI\n"); > > > - > > > -#ifdef RTE_LIBRTE_IVSHMEM > > > - if (rte_eal_ivshmem_init() < 0) > > > - rte_panic("Cannot init IVSHMEM\n"); > > > -#endif > > > - > > > if (rte_eal_memory_init() < 0) > > > rte_panic("Cannot init memory\n"); > > > > > > @@ -772,14 +764,30 @@ rte_eal_init(int argc, char **argv) > > > if (rte_eal_tailqs_init() < 0) > > > rte_panic("Cannot init tail queues for objects\n"); > > > > > > + if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0) > > > + rte_panic("Cannot init logs\n"); > > > + > > > + eal_check_mem_on_local_socket(); > > > + > > > + rte_eal_mcfg_complete(); > > > + > > > + /*with memory-only option, we need not cpu affinity, pci device, > > > alarm, external devices, interrupt, etc. */ > > > + if( internal_config.memory_only ){ > > > + RTE_LOG (DEBUG, EAL, "memory-only defined, so only memory being > > > initialized.\n"); > > > + return 0; > > > + } > > > + > > > + if (rte_eal_pci_init() < 0) > > > + rte_panic("Cannot init PCI\n"); > > > + > > > #ifdef RTE_LIBRTE_IVSHMEM > > > + if (rte_eal_ivshmem_init() < 0) > > > + rte_panic("Cannot init IVSHMEM\n"); > > > + > > > if (rte_eal_ivshmem_obj_init() < 0) > > > rte_panic("Cannot init IVSHMEM objects\n"); > > > #endif > > > > > > - if (rte_eal_log_init(logid, internal_config.syslog_facility) < 0) > > > - rte_panic("Cannot init logs\n"); > > > - > > > if (rte_eal_alarm_init() < 0) > > > rte_panic("Cannot init interrupt-handling thread\n"); > > > > > > @@ -789,10 +797,6 @@ rte_eal_init(int argc, char **argv) > > > if (rte_eal_timer_init() < 0) > > > rte_panic("Cannot init HPET or TSC timers\n"); > > > > > > - eal_check_mem_on_local_socket(); > > > - > > > - rte_eal_mcfg_complete(); > > > - > > > TAILQ_FOREACH(solib, &solib_list, next) { > > > RTE_LOG(INFO, EAL, "open shared lib %s\n", solib->name); > > > solib->lib_handle = dlopen(solib->name, RTLD_NOW); > > > -- > > > 1.9.4.msysgit.2 >
