linux-pg-walsender-patched.txt

# ========
# captured on: Fri May 12 20:07:59 2017
# hostname : ip-10-34-11-79
# os release : 4.4.0-70-generic
# perf version : 4.4.49
# arch : x86_64
# nrcpus online : 1
# nrcpus avail : 1
# cpudesc : Intel(R) Xeon(R) CPU E5-2676 v3 @ 2.40GHz
# cpuid : GenuineIntel,6,63,2
# total memory : 2046568 kB
# cmdline : /usr/lib/linux-tools-4.4.0-70/perf record --pid=29993 -F 99 -g
# event : name = cpu-clock, , type = 1, size = 112, { sample_period, sample_freq } = 99, samp
# HEADER_CPU_TOPOLOGY info available, use -I to display
# HEADER_NUMA_TOPOLOGY info available, use -I to display
# pmu mappings: msr = 6, software = 1, power = 7, tracepoint = 2, breakpoint = 5
# ========
#
#
# Total Lost Samples: 0
#
# Samples: 5K of event 'cpu-clock'
# Event count (approx.): 59585857990
#
# Children      Self  Command   Shared Object      Symbol
# ........  ........  ........  .................  .........................................
#
    66.86%    66.79%  postgres  postgres           [.] hash_seq_search
            |
            ---hash_seq_search
               |
               |--0.05%-- xen_hvm_callback_vector
               |          xen_evtchn_do_upcall
               |          irq_exit
               |          |
               |          |--0.03%-- __do_softirq
               |          |          net_rx_action
               |          |          xennet_poll
               |          |          |
               |          |          |--0.02%-- napi_gro_receive
               |          |          |          netif_receive_skb_internal
               |          |          |          __netif_receive_skb
               |          |          |          __netif_receive_skb_core
               |          |          |          ip_rcv
               |          |          |          ip_rcv_finish
               |          |          |          ip_local_deliver
               |          |          |          ip_local_deliver_finish
               |          |          |          tcp_v4_rcv
               |          |          |          sock_put
               |          |          |          sk_free
               |          |          |          netlink_has_listeners
               |          |          |
               |          |           --0.02%-- xennet_alloc_rx_buffers
               |          |                     __netdev_alloc_skb
               |          |                     __build_skb
               |          |
               |           --0.02%-- rcu_bh_qs
               |
                --0.02%-- retint_user
                          prepare_exit_to_usermode
                          exit_to_usermode_loop

    17.87%     0.00%  postgres  [unknown]          [.] 0x000000000188e218
            |
            ---0x188e218
               |
               |--7.37%-- LocalExecuteInvalidationMessage
               |
               |--2.41%-- CatCacheInvalidate
               |
               |--2.31%-- ReorderBufferCommit
               |          |
               |           --0.02%-- retint_user
               |                     prepare_exit_to_usermode
               |                     exit_to_usermode_loop
               |
               |--2.22%-- hash_search_with_hash_value
               |
               |--1.39%-- InvalidateCatalogSnapshot
               |
               |--1.32%-- SysCacheInvalidate
               |
               |--0.59%-- RelationCacheInvalidateEntry
               |
                --0.25%-- hash_search

     9.27%     9.27%  postgres  postgres           [.] LocalExecuteInvalidationMessage
            |
            |--2.54%-- 0xde3bc7f0a8264c9b
            |          0x188e218
            |          LocalExecuteInvalidationMessage
            |
            |--2.31%-- 0xde3bc7f09919731f
            |          0x188e218
            |          LocalExecuteInvalidationMessage
            |
            |--1.88%-- LocalExecuteInvalidationMessage
            |
            |--1.88%-- 0xde3bc7f0b2c75c49
            |          0x188e218
            |          LocalExecuteInvalidationMessage
            |
            |--0.64%-- 0xde3bc7f05c1cdb8e
            |          0x188e218
            |          LocalExecuteInvalidationMessage
            |
             --0.02%-- 0
                       LocalExecuteInvalidationMessage

     7.56%     7.54%  postgres  postgres           [.] CatCacheInvalidate
            |
            |--3.29%-- 0
            |          CatCacheInvalidate
            |
            |--0.85%-- 0xde3bc7f0a8264c9b
            |          0x188e218
            |          CatCacheInvalidate
            |
            |--0.76%-- 0xde3bc7f0b2c75c49
            |          0x188e218
            |          CatCacheInvalidate
            |
            |--0.73%-- CatCacheInvalidate
            |          |
            |           --0.02%-- xen_hvm_callback_vector
            |                     xen_evtchn_do_upcall
            |                     irq_exit
            |                     __do_softirq
            |                     net_rx_action
            |                     xennet_poll
            |                     napi_gro_receive
            |                     netif_receive_skb_internal
            |                     __netif_receive_skb
            |                     __netif_receive_skb_core
            |                     ip_rcv
            |                     nf_hook_slow
            |                     nf_iterate
            |                     ipv4_conntrack_in
            |                     nf_conntrack_in
            |                     tcp_packet
            |                     __nf_ct_refresh_acct
            |                     mod_timer_pending
            |                     __lock_text_start
            |
            ... snip ...