Re: curl-loader https: low performance due to DNS query?
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Re: curl-loader https: low performance due to DNS query?
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From: Robert I. <cor...@gm...> - 2012-03-06 05:28:39
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Several questions:
1. Could you please run top and see if there are other processes burning CPU?
2. What is the number of loading clients that you use?
3. Could you try curl-loader-0.52 if it compiles for you?
If not, please try to place curl-loader-7.19.7.tar.gz and c-ares-16.0.tar.gz,
update their versions in Makefile and rebuild by make cleanall; make
4. Is it correct to say that for HTTP URLs (not HTTPS) you are getting
a good throughput
and CAPS with curl-loader-0.56?
Thanks,
Robert
On Tue, Mar 6, 2012 at 3:52 AM, Fred Huang <di...@gm...> wrote:
> TIMEOUT -1 -> 60 works a little better but no performance improvement on
> CAPS or throughput.
>
> test 5:
> enable c-ares;
> curl_easy_setopt (handle, CURLOPT_DNS_CACHE_TIMEOUT, 60);
>
> dns server: dnsmasq@127.0.0.1, 2,000,000 dns entry cache, resolve *.com to
> one IP address
> number of domain names in URLs: 780,000
> number of client: 1000
> CPU usage: 74%
> cpu% irq% sirq% sys% iowt% mem_used buf&cached
> 74.0 0.0 0.7 4.2 0.0 3530.6Mb 250.8Mb
> SSL TPS: 360
> SSL throughput: 220Mbps
>
> # gprof /usr/bin/curl-loader gmon.out -p | head -50
> Flat profile:
> Each sample counts as 0.01 seconds.
> % cumulative self self total
> time seconds seconds calls s/call s/call name
> 26.63 23.13 23.13 119226 0.00 0.00
> Curl_hash_clean_with_criterium
> 20.34 40.80 17.67 317792146 0.00 0.00
> hostcache_timestamp_remove
> 11.27 50.59 9.79 2579903 0.00 0.00 Curl_hash_pick
> 7.84 57.40 6.81 120606 0.00 0.00 create_conn
> 5.65 62.31 4.91 119117401 0.00 0.00 Curl_str_key_compare
> 4.98 66.64 4.33 329829 0.00 0.00 Curl_hash_add
> 2.80 69.08 2.44 4476606 0.00 0.00 dprintf_formatf
> 2.57 71.31 2.23 124019 0.00 0.00 ConnectionStore
> 1.50 72.61 1.30 740997609 0.00 0.00 ares__is_list_empty
> 1.16 73.61 1.01 locking_function
> 0.76 74.27 0.66 238744 0.00 0.00 ares_cancel
> 0.70 74.88 0.61 457564 0.00 0.00
> curl_multi_socket_action
> 0.67 75.46 0.58 118616 0.00 0.00
> curl_multi_remove_handle
> 0.58 75.97 0.51 8211502 0.00 0.00
> client_tracing_function
> 0.53 76.43 0.46 733561 0.00 0.00 Curl_readwrite
> 0.51 76.87 0.44 2183179 0.00 0.00 multi_runsingle
> 0.51 77.31 0.44 166585567 0.00 0.00 addbyter
> 0.44 77.69 0.38 2175805 0.00 0.00 Curl_raw_equal
> 0.43 78.06 0.38 id_function
> 0.40 78.41 0.35 29789346 0.00 0.00 Curl_socket_check
> 0.40 78.76 0.35 479671 0.00 0.00 ossl_connect_common
> 0.40 79.11 0.35 490639 0.00 0.00 ares__init_list_node
> 0.33 79.40 0.29 94197670 0.00 0.00 Curl_raw_toupper
> 0.33 79.69 0.29 3268031 0.00 0.00 Curl_pgrsUpdate
> 0.28 79.93 0.24 8797 0.00 0.00 curl_multi_perform
> 0.27 80.17 0.24 2233641 0.00 0.00 Curl_infof
> 0.26 80.40 0.23 1839837 0.00 0.00 Curl_splay
> 0.24 80.61 0.21 121713028 0.00 0.00 curl_strequal
> 0.21 80.79 0.18 243333 0.00 0.00 Curl_ssl_getsessionid
> 0.18 80.95 0.16 122180 0.00 0.00 Curl_num_addresses
> 0.17 81.09 0.15 8271666 0.00 0.00 Curl_debug
> 0.16 81.23 0.14 18902452 0.00 0.00 alloc_addbyter
> 0.16 81.37 0.14 8851 0.00 0.00 curl_multi_socket_all
> 0.14 81.50 0.13 2236769 0.00 0.00 Curl_read
> 0.14 81.62 0.12 2271700 0.00 0.00 fd_key_compare
> 0.14 81.74 0.12 323167 0.00 0.00 event_del
> 0.14 81.86 0.12 205436 0.00 0.00 read_udp_packets
> 0.14 81.98 0.12 200979 0.00 0.00 processfds
> 0.13 82.09 0.11 123886 0.00 0.00
> Curl_if_is_interface_name
> 0.13 82.20 0.11 120350 0.00 0.00 Curl_http
> 0.13 82.31 0.11 ssl_tls_trace
> 0.12 82.41 0.10 119229 0.00 0.00 Curl_splayremovebyaddr
> 0.12 82.51 0.10 7798717 0.00 0.00 Curl_raw_nequal
> 0.12 82.61 0.10 784485 0.00 0.00 event_add
> 0.10 82.70 0.09 643482 0.00 0.00 Curl_expire
>
>
>
>
>
> test 6:
> enable c-ares;
> curl_easy_setopt (handle, CURLOPT_DNS_CACHE_TIMEOUT, 60);
> CURL_VER:=7.24.0-20120109 -> CURL_VER:=7.23.0
>
> dns server: dnsmasq@127.0.0.1, 2,000,000 dns entry cache, resolve *.com to
> one IP address
> number of domain names in URLs: 780,000
> number of client: 1000
> CPU usage: 86%
> cpu% irq% sirq% sys% iowt% mem_used buf&cached
> 85.9 0.0 0.2 2.1 0.0 3537.2Mb 261.4Mb
> SSL TPS: 360
> SSL throughput: 200Mbps
>
> # gprof /usr/bin/curl-loader gmon.out -p | head -20
> Flat profile:
> Each sample counts as 0.01 seconds.
> % cumulative self self total
> time seconds seconds calls s/call s/call name
> 27.19 19.96 19.96 103472 0.00 0.00
> Curl_hash_clean_with_criterium
> 21.73 35.91 15.95 274168981 0.00 0.00
> hostcache_timestamp_remove
> 10.33 43.49 7.58 2256441 0.00 0.00 Curl_hash_pick
> 7.21 48.78 5.29 104540 0.00 0.00 create_conn
> 6.20 53.33 4.55 103413405 0.00 0.00 Curl_str_key_compare
> 4.88 56.91 3.58 287109 0.00 0.00 Curl_hash_add
> 3.02 59.13 2.22 3797855 0.00 0.00 dprintf_formatf
> 2.10 60.67 1.54 107711 0.00 0.00 ConnectionStore
> 1.65 61.88 1.21 642725327 0.00 0.00 ares__is_list_empty
> 1.19 62.76 0.88 locking_function
> 0.87 63.40 0.64 207817 0.00 0.00 ares_cancel
> 0.56 63.81 0.41 404108 0.00 0.00
> curl_multi_socket_action
> 0.54 64.21 0.40 425603 0.00 0.00 ares__init_list_node
> 0.53 64.60 0.39 7068112 0.00 0.00
> client_tracing_function
> 0.49 64.96 0.36 1908587 0.00 0.00 multi_runsingle
>
>
>
> test 7:
> enable c-ares;
> curl_easy_setopt (handle, CURLOPT_DNS_CACHE_TIMEOUT, -1);
> CURL_VER:=7.24.0-20120109 -> CURL_VER:=7.23.0
>
> dns server: dnsmasq@127.0.0.1, 2,000,000 dns entry cache, resolve *.com to
> one IP address
> number of domain names in URLs: 780,000
> number of client: 1000
> CPU usage: 86%
> cpu% irq% sirq% sys% iowt% mem_used buf&cached
> 86.6 0.0 0.6 3.3 0.0 3624.8Mb 263.0Mb
> SSL TPS: 300
> SSL throughput: 200Mbps
>
> # gprof /usr/bin/curl-loader gmon.out -p | head -20
> Flat profile:
> Each sample counts as 0.01 seconds.
> % cumulative self self total
> time seconds seconds calls s/call s/call name
> 39.83 369.71 369.71 207173 0.00 0.00
> Curl_hash_clean_with_criterium
> 24.27 594.98 225.27 3198337733 0.00 0.00
> hostcache_timestamp_remove
> 13.75 722.59 127.61 4312864 0.00 0.00 Curl_hash_pick
> 9.19 807.87 85.28 546507 0.00 0.00 Curl_hash_add
> 6.14 864.88 57.01 1022419684 0.00 0.00 Curl_str_key_compare
> 2.06 884.00 19.12 203749 0.00 0.00 create_conn
> 0.54 888.99 4.99 213306 0.00 0.00 ConnectionStore
> 0.49 893.50 4.51 7331251 0.00 0.00 dprintf_formatf
> 0.29 896.16 2.66 1287182329 0.00 0.00 ares__is_list_empty
> 0.23 898.28 2.12 locking_function
> 0.20 900.10 1.82 212210 0.00 0.00 Curl_num_addresses
> 0.17 901.66 1.56 198385 0.00 0.00
> curl_multi_remove_handle
> 0.12 902.81 1.15 411114 0.00 0.00 ares_cancel
> 0.12 903.95 1.14 3683448 0.00 0.00 multi_runsingle
> 0.11 904.97 1.03 13664120 0.00 0.00
> client_tracing_function
>
>
> test 8:
> enable c-ares;
> curl_easy_setopt (handle, CURLOPT_DNS_CACHE_TIMEOUT, 60);
> CURL_VER:=7.24.0-20120109 -> CURL_VER:=7.24.0
>
> dns server: dnsmasq@127.0.0.1, 2,000,000 dns entry cache, resolve *.com to
> one IP address
> number of domain names in URLs: 780,000
> number of client: 1000
> CPU usage: 75%
> cpu% irq% sirq% sys% iowt% mem_used buf&cached
> 75.2 0.0 0.2 2.1 0.0 3537.2Mb 261.4Mb
> SSL TPS: 380
> SSL throughput: 220Mbps
>
> # gprof /usr/bin/curl-loader gmon.out -p | head -20
> Flat profile:
> Each sample counts as 0.01 seconds.
> % cumulative self self total
> time seconds seconds calls s/call s/call name
> 27.58 12.31 12.31 71140 0.00 0.00
> Curl_hash_clean_with_criterium
> 19.09 20.83 8.52 176729692 0.00 0.00
> hostcache_timestamp_remove
> 10.44 25.49 4.66 1589309 0.00 0.00 Curl_hash_pick
> 6.85 28.55 3.06 73204 0.00 0.00 create_conn
> 5.56 31.03 2.48 67620530 0.00 0.00 Curl_str_key_compare
> 4.41 33.00 1.97 200684 0.00 0.00 Curl_hash_add
> 3.56 34.59 1.59 2717956 0.00 0.00 dprintf_formatf
> 1.72 35.36 0.77 75247 0.00 0.00 ConnectionStore
> 1.70 36.12 0.76 444342256 0.00 0.00 ares__is_list_empty
> 1.23 36.67 0.55 locking_function
> 1.16 37.19 0.52 143342 0.00 0.00 ares_cancel
> 0.99 37.63 0.44 72211 0.00 0.00
> curl_multi_remove_handle
> 0.74 37.96 0.33 1333371 0.00 0.00 multi_runsingle
> 0.68 38.27 0.31 101147798 0.00 0.00 addbyter
> 0.58 38.53 0.26 288737 0.00 0.00
> curl_multi_socket_action
>
>
>
> test 9:
> enable c-ares;
> curl_easy_setopt (handle, CURLOPT_DNS_CACHE_TIMEOUT, -1);
> CURL_VER:=7.24.0-20120109 -> CURL_VER:=7.24.0
>
> dns server: dnsmasq@127.0.0.1, 2,000,000 dns entry cache, resolve *.com to
> one IP address
> number of domain names in URLs: 780,000
> number of client: 1000
> CPU usage: 75%
> cpu% irq% sirq% sys% iowt% mem_used buf&cached
> 75.1 0.0 0.6 4.1 0.0 3545.2Mb 260.1Mb
> SSL TPS: 380
> SSL throughput: 200Mbps
>
> # gprof /usr/bin/curl-loader gmon.out -p | head -20
> Flat profile:
> Each sample counts as 0.01 seconds.
> % cumulative self self total
> time seconds seconds calls s/call s/call name
> 34.00 31.13 31.13 72495 0.00 0.00
> Curl_hash_clean_with_criterium
> 23.64 52.78 21.65 386070412 0.00 0.00
> hostcache_timestamp_remove
> 13.28 64.94 12.16 1619440 0.00 0.00 Curl_hash_pick
> 5.92 70.36 5.42 137653129 0.00 0.00 Curl_str_key_compare
> 5.50 75.40 5.04 203018 0.00 0.00 Curl_hash_add
> 4.55 79.57 4.17 74618 0.00 0.00 create_conn
> 1.70 81.13 1.56 2757148 0.00 0.00 dprintf_formatf
> 0.98 82.03 0.90 76945 0.00 0.00 ConnectionStore
> 0.95 82.90 0.87 455775100 0.00 0.00 ares__is_list_empty
> 0.57 83.42 0.53 locking_function
> 0.39 83.78 0.36 146742 0.00 0.00 ares_cancel
> 0.35 84.10 0.32 102968806 0.00 0.00 addbyter
> 0.35 84.42 0.32 456587 0.00 0.00 Curl_readwrite
> 0.35 84.74 0.32 73133 0.00 0.00
> curl_multi_remove_handle
> 0.34 85.05 0.31 1360545 0.00 0.00 multi_runsingle
>
>
> 2012/3/6 Robert Iakobashvili <cor...@gm...>
>>
>> If it will not be helpful this means that recent
>> changes in libcurl library have broken DNS interface.
>>
>> You can try a previos version and the latest libcurl, like:
>>
>> http://curl.haxx.se/download/curl-7.23.0.tar.gz
>> and
>> http://curl.haxx.se/downloadcurl-7.24.0.tar.gz
>>
>> by:
>>
>> 1. downloading a libcurl version and placing it to
>> curl-loader-0.56/packages ;
>> 2. correcting the Makefile in curl-loader-0.56
>> CURL_VER:=7.24.0-20120109 -> CURL_VER:=7.24 or CURL_VER:=7.23
>> 3. make cleanall; make
>>
>> Please, send us your observations.
>> Thanks!
>> Robert
>>
>> On Mon, Mar 5, 2012 at 6:57 PM, Robert Iakobashvili <cor...@gm...>
>> wrote:
>> > If so, please try to change
>> >
>> > loader.c, line 578 which looks like:
>> > curl_easy_setopt (handle, CURLOPT_DNS_CACHE_TIMEOUT, -1);
>> >
>> > 1. instead of -1 try to set some value like 60
>> > 2. make clean; make
>> >
>> > Thanks,
>> > Robert
>> >
>> > On Mon, Mar 5, 2012 at 6:19 PM, Fred Huang <di...@gm...> wrote:
>> >>
>> >> Looks like the bottleneck comes from libcurl other than c-ares...
>> >> test 3 (no ares patch applied):
>> >> dns server: dnsmasq@127.0.0.1, 2,000,000 dns entry cache, resolve *.com
>> >> to one IP address
>> >> number of domain names in URLs: 780,000
>> >> number of client: 1000
>> >> CPU usage: 85%
>> >> cpu% irq% sirq% sys% iowt% mem_used buf&cached
>> >> 85.6 0.0 0.8 5.9 0.0 3334.3Mb 112.0Mb
>> >> SSL TPS: 320
>> >> SSL throughput: 200Mbps
>> >>
>> >> # gprof /usr/bin/curl-loader gmon.out -p | head -50
>> >> Flat profile:
>> >> Each sample counts as 0.01 seconds.
>> >> % cumulative self self total
>> >> time seconds seconds calls s/call s/call name
>> >> 40.80 120.16 120.16 116079 0.00 0.00
>> >> Curl_hash_clean_with_criterium
>> >> 24.46 192.18 72.02 983166323 0.00 0.00
>> >> hostcache_timestamp_remove
>> >> 13.30 231.35 39.17 2059341 0.00 0.00 Curl_hash_pick
>> >> 6.45 250.35 19.00 240087 0.00 0.00 Curl_hash_add
>> >> 4.81 264.51 14.16 334257102 0.00 0.00
>> >> Curl_str_key_compare
>> >> 3.40 274.52 10.01 119514 0.00 0.00 create_conn
>> >> 0.93 277.25 2.73 4478910 0.00 0.00 dprintf_formatf
>> >> 0.90 279.91 2.66 122209 0.00 0.00 ConnectionStore
>> >> 0.40 281.09 1.18 locking_function
>> >> 0.27 281.88 0.79 114759 0.00 0.00
>> >> curl_multi_remove_handle
>> >> 0.21 282.51 0.63 7993664 0.00 0.00
>> >> client_tracing_function
>> >> 0.21 283.12 0.61 122685 0.00 0.00
>> >> Curl_num_addresses
>> >> 0.19 283.68 0.56 397028 0.00 0.00
>> >> curl_multi_socket_action
>> >> 0.19 284.23 0.55 2036116 0.00 0.00 multi_runsingle
>> >> 0.17 284.72 0.49 703687 0.00 0.00 Curl_readwrite
>> >> 0.16 285.19 0.47 id_function
>> >> 0.15 285.62 0.43 29692029 0.00 0.00 Curl_socket_check
>> >> 0.14 286.02 0.40 91973856 0.00 0.00 Curl_raw_toupper
>> >> 0.13 286.40 0.38 164664144 0.00 0.00 addbyter
>> >> 0.13 286.77 0.37 2180797 0.00 0.00 Curl_infof
>> >> 0.11 287.10 0.33 122675 0.00 0.00
>> >> Curl_if_is_interface_name
>> >> 0.10 287.39 0.29 471318 0.00 0.00
>> >> ossl_connect_common
>> >> 0.10 287.67 0.28 2113528 0.00 0.00 Curl_raw_equal
>> >> 0.09 287.93 0.26 8676 0.00 0.02
>> >> curl_multi_socket_all
>> >> 0.08 288.17 0.24 1663262 0.00 0.00 Curl_splay
>> >> 0.08 288.41 0.24 8505 0.00 0.01
>> >> curl_multi_perform
>> >> 0.07 288.63 0.22 3114576 0.00 0.00 Curl_pgrsUpdate
>> >> 0.06 288.80 0.17 119637 0.00 0.00 singleipconnect
>> >> 0.06 288.97 0.17 7994818 0.00 0.00 Curl_debug
>> >> 0.05 289.13 0.16 235820 0.00 0.00 event_del
>> >> 0.05 289.29 0.16 119393071 0.00 0.00 curl_strequal
>> >> 0.05 289.45 0.16 18535473 0.00 0.00 alloc_addbyter
>> >> 0.05 289.61 0.16 356074 0.00 0.00 Curl_hash_str
>> >> 0.05 289.76 0.15 1797233 0.00 0.00 fd_key_compare
>> >> 0.05 289.91 0.15 234966 0.00 0.00
>> >> Curl_ssl_getsessionid
>> >> 0.04 290.04 0.13 585853 0.00 0.00
>> >> Curl_llist_destroy
>> >> 0.04 290.16 0.12 240826 0.00 0.00 Curl_resolv
>> >> 0.03 290.26 0.10 7514328 0.00 0.00 Curl_raw_nequal
>> >> 0.03 290.36 0.10 2214436 0.00 0.00 Curl_read
>> >> 0.03 290.46 0.10 116872 0.00 0.00
>> >> Curl_http_readwrite_headers
>> >> 0.03 290.56 0.10 ssl_tls_trace
>> >> 0.03 290.66 0.10 8013097 0.00 0.00 scan_response
>> >> 0.03 290.75 0.09 29488555 0.00 0.00 curlx_tvdiff
>> >> 0.03 290.84 0.09 2142468 0.00 0.00 Curl_setopt
>> >> 0.03 290.93 0.09 476299 0.00 0.00 Curl_expire
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> 2012/3/5 Robert Iakobashvili <cor...@gm...>
>> >>>
>> >>> Dear Fred Huang,
>> >>>
>> >>> Thanks for your posting.
>> >>>
>> >>> Could you please check if this is due to some badness at cares?
>> >>> Thanks.
>> >>>
>> >>> Let's exclude usage of cares based DNS resolving by applying the patch
>> >>> attached
>> >>> and use instead global DNS cache.
>> >>>
>> >>> cd ./curl-loader-0.56
>> >>> patch -p1 < path-to/disable-cares-use-global-dns.patch
>> >>> make cleanall; make
>> >>>
>> >>> See if it helps.
>> >>>
>> >>> Global cache, unfortunately, is not thread safe.
>> >>>
>> >>> If it helps, we'll try to restore the previous version of cares.
>> >>>
>> >>> Thanks,
>> >>> Robert
>> >>>
>> >>> On Mon, Mar 5, 2012 at 4:28 PM, Fred Huang <di...@gm...> wrote:
>> >>>>
>> >>>> test 1:
>> >>>>
>> >>>> dns server: dnsmasq@127.0.0.1, 2,000,000 dns entry cache, resolve
>> >>>> *.com to one IP address
>> >>>> number of domain names in all https URLs: 780,000
>> >>>> number of client: 1000
>> >>>> CPU usage: 78%
>> >>>> cpu% irq% sirq% sys% iowt% mem_used buf&cached
>> >>>> 78.8 0.0 0.6 3.8 0.0 3640.9Mb 282.1Mb
>> >>>> SSL TPS: 300
>> >>>> SSL throughput: 200Mbps
>> >>>>
>> >>>> # gprof /usr/bin/curl-loader gmon.out -p | head -50
>> >>>> Flat profile:
>> >>>> Each sample counts as 0.01 seconds.
>> >>>> % cumulative self self total
>> >>>> time seconds seconds calls s/call s/call name
>> >>>> 38.55 127.10 127.10 130975 0.00 0.00
>> >>>> Curl_hash_clean_with_criterium
>> >>>> 24.63 208.32 81.22 1247528407 0.00 0.00
>> >>>> hostcache_timestamp_remove
>> >>>> 13.08 251.44 43.12 2791988 0.00 0.00 Curl_hash_pick
>> >>>> 7.30 275.51 24.07 352490 0.00 0.00 Curl_hash_add
>> >>>> 6.01 295.31 19.80 410760770 0.00 0.00
>> >>>> Curl_str_key_compare
>> >>>> 2.95 305.04 9.73 131015 0.00 0.00 create_conn
>> >>>> 0.88 307.94 2.90 4841390 0.00 0.00 dprintf_formatf
>> >>>> 0.74 310.38 2.44 136036 0.00 0.00 ConnectionStore
>> >>>> 0.48 311.96 1.58 814604911 0.00 0.00
>> >>>> ares__is_list_empty
>> >>>> 0.36 313.16 1.20
>> >>>> locking_function
>> >>>> 0.27 314.06 0.90 261608 0.00 0.00 ares_cancel
>> >>>> 0.22 314.79 0.73 127417 0.00 0.00
>> >>>> curl_multi_remove_handle
>> >>>> 0.19 315.40 0.62 8906301 0.00 0.00
>> >>>> client_tracing_function
>> >>>> 0.17 315.97 0.57 135305 0.00 0.00
>> >>>> Curl_num_addresses
>> >>>> 0.17 316.54 0.57 181937907 0.00 0.00 addbyter
>> >>>> 0.17 317.09 0.55 2374363 0.00 0.00 multi_runsingle
>> >>>> 0.16 317.62 0.53 541954 0.00 0.00
>> >>>> ares__init_list_node
>> >>>> 0.16 318.14 0.52 494412 0.00 0.00
>> >>>> curl_multi_socket_action
>> >>>> 0.14 318.60 0.46 33578897 0.00 0.00
>> >>>> Curl_socket_check
>> >>>> 0.13 319.04 0.44 102951052 0.00 0.00
>> >>>> Curl_raw_toupper
>> >>>> 0.13 319.48 0.44 787558 0.00 0.00 Curl_readwrite
>> >>>> 0.13 319.91 0.44 id_function
>> >>>> 0.12 320.29 0.38 391390 0.00 0.00 Curl_hash_str
>> >>>> 0.09 320.58 0.29 9216 0.00 0.00
>> >>>> curl_multi_perform
>> >>>> 0.08 320.86 0.28 2350908 0.00 0.00 Curl_raw_equal
>> >>>> 0.08 321.14 0.28 2019415 0.00 0.00 Curl_splay
>> >>>> 0.08 321.40 0.26 520625 0.00 0.00
>> >>>> ossl_connect_common
>> >>>> 0.08 321.65 0.25 3532992 0.00 0.00 Curl_pgrsUpdate
>> >>>> 0.07 321.87 0.22 131778537 0.00 0.00 curl_strequal
>> >>>> 0.05 322.05 0.18 8954118 0.00 0.00 scan_response
>> >>>> 0.05 322.23 0.18 533644 0.00 0.00
>> >>>> ares_expand_name
>> >>>> 0.05 322.40 0.17 2477345 0.00 0.00 fd_key_compare
>> >>>> 0.05 322.57 0.17 2429135 0.00 0.00 Curl_infof
>> >>>> 0.05 322.74 0.17 130966 0.00 0.00 singleipconnect
>> >>>> 0.05 322.90 0.16 9292 0.00 0.00
>> >>>> curl_multi_socket_all
>> >>>> 0.05 323.06 0.16 270137 0.00 0.00
>> >>>> ares__get_hostent
>> >>>> 0.05 323.21 0.15 8943657 0.00 0.00 Curl_debug
>> >>>> 0.04 323.35 0.14 262493 0.00 0.00
>> >>>> Curl_ssl_getsessionid
>> >>>> 0.04 323.48 0.13 566006 0.00 0.00 socket_callback
>> >>>> 0.04 323.61 0.13 33983864 0.00 0.00 curlx_tvdiff
>> >>>> 0.04 323.74 0.13 132853 0.00 0.00
>> >>>> Curl_http_readwrite_headers
>> >>>> 0.04 323.86 0.12 344032 0.00 0.00 epoll_del
>> >>>> 0.04 323.98 0.12 223477 0.00 0.00 Curl_poll
>> >>>> 0.04 324.10 0.12 8526280 0.00 0.00 Curl_raw_nequal
>> >>>> 0.03 324.21 0.11 348839 0.00 0.00 event_del
>> >>>>
>> >>>>
>> >>>>
>> >>>>
>> >>>> test 2:
>> >>>>
>> >>>> dns server: dnsmasq@127.0.0.1, 2,000,000 dns entry cache, resolve
>> >>>> *.com to one IP address
>> >>>> number of domain names in all https URLs: 1
>> >>>> number of client: 1000
>> >>>> CPU usage: 75%
>> >>>> SSL TPS: 1300
>> >>>> SSL throughput: 700Mbps
>> >>>>
>> >>>> # gprof /usr/bin/curl-loader gmon.out -p | head -50
>> >>>> Flat profile:
>> >>>> Each sample counts as 0.01 seconds.
>> >>>> % cumulative self self total
>> >>>> time seconds seconds calls s/call s/call name
>> >>>> 8.98 2.45 2.45 5127312 0.00 0.00 dprintf_formatf
>> >>>> 8.90 4.88 2.43 1292796503 0.00 0.00
>> >>>> ares__is_list_empty
>> >>>> 6.12 6.55 1.67 322461 0.00 0.00 create_conn
>> >>>> 4.58 7.80 1.25 419872 0.00 0.00 ares_cancel
>> >>>> 4.10 8.92 1.12 2100162 0.00 0.00 Curl_readwrite
>> >>>> 3.92 9.99 1.07 4527388 0.00 0.00 Curl_hash_pick
>> >>>> 3.43 10.93 0.94
>> >>>> locking_function
>> >>>> 3.04 11.76 0.83 909759 0.00 0.00
>> >>>> curl_multi_socket_action
>> >>>> 3.00 12.58 0.82 97252 0.00 0.00
>> >>>> Curl_hash_clean_with_criterium
>> >>>> 2.71 13.32 0.74 179704016 0.00 0.00
>> >>>> Curl_raw_toupper
>> >>>> 2.68 14.05 0.73 4646524 0.00 0.00 multi_runsingle
>> >>>> 2.44 14.71 0.67 13862992 0.00 0.00
>> >>>> client_tracing_function
>> >>>> 2.42 15.37 0.66 319735 0.00 0.00
>> >>>> curl_multi_remove_handle
>> >>>> 2.42 16.03 0.66 22 0.03 0.03
>> >>>> ares__init_list_node
>> >>>> 1.94 16.56 0.53 9930244 0.00 0.00
>> >>>> hostcache_timestamp_remove
>> >>>> 1.94 17.09 0.53 169320088 0.00 0.00 addbyter
>> >>>> 1.80 17.58 0.49 id_function
>> >>>> 1.36 17.95 0.37 7057146 0.00 0.00 Curl_pgrsUpdate
>> >>>> 1.36 18.32 0.37 16835 0.00 0.00
>> >>>> curl_multi_socket_all
>> >>>> 1.25 18.66 0.34 16719 0.00 0.00
>> >>>> curl_multi_perform
>> >>>> 1.21 18.99 0.33 329403 0.00 0.00
>> >>>> Curl_http_readwrite_headers
>> >>>> 1.17 19.31 0.32 4036624 0.00 0.00 Curl_splay
>> >>>> 1.14 19.62 0.31 20838902 0.00 0.00 Curl_raw_nequal
>> >>>> 0.82 19.85 0.23 2764123 0.00 0.00 Curl_infof
>> >>>> 0.81 20.07 0.22 5933857 0.00 0.00 ossl_recv
>> >>>> 0.77 20.28 0.21 323112 0.00 0.00
>> >>>> Curl_splayremovebyaddr
>> >>>> 0.75 20.48 0.21 5943991 0.00 0.00 Curl_read
>> >>>> 0.70 20.67 0.19 425174 0.00 0.00 event_del
>> >>>> 0.70 20.86 0.19 98652 0.00 0.00
>> >>>> Curl_if_is_interface_name
>> >>>> 0.70 21.05 0.19 8677733 0.00 0.00
>> >>>> Curl_socket_check
>> >>>> 0.59 21.21 0.16 4129554 0.00 0.00 fd_key_compare
>> >>>> 0.57 21.37 0.16 14017019 0.00 0.00 Curl_debug
>> >>>> 0.55 21.52 0.15 9376861 0.00 0.00
>> >>>> stat_data_in_add
>> >>>> 0.55 21.67 0.15 6840468 0.00 0.00 Curl_timeleft
>> >>>> 0.55 21.82 0.15 2054602 0.00 0.00 Curl_raw_equal
>> >>>> 0.55 21.97 0.15 1291611 0.00 0.00 Curl_expire
>> >>>> 0.51 22.11 0.14 16570063 0.00 0.00 curlx_tvnow
>> >>>> 0.51 22.25 0.14 13863284 0.00 0.00 scan_response
>> >>>> 0.51 22.39 0.14 5498864 0.00 0.00 Curl_setopt
>> >>>> 0.48 22.52 0.13 97490291 0.00 0.00 curl_strequal
>> >>>> 0.44 22.64 0.12 324253 0.00 0.00 Curl_http
>> >>>> 0.44 22.76 0.12 394386 0.00 0.00
>> >>>> ossl_connect_common
>> >>>> 0.40 22.87 0.11 3581335 0.00 0.00 Curl_getinfo
>> >>>> 0.38 22.97 0.11 26983092 0.00 0.00 alloc_addbyter
>> >>>> 0.37 23.07 0.10 8729044 0.00 0.00
>> >>>> Curl_client_write
>> >>>>
>> >>>>
>> >>>>
>> >>>> ------------------------------------------------------------------------------
>> >>>> Try before you buy = See our experts in action!
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>> >>>>
>> >>>
>> >>>
>> >>>
>> >>> --
>> >>> Regards,
>> >>> Robert Iakobashvili, Ph.D.
>> >>>
>> >>> Home: http://www.ghotit.com
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>> >>> Twitter: http://twitter.com/ghotit
>> >>> Facebook: http://facebook.com/ghotit
>> >>> ......................................................................
>> >>> Ghotit Dyslexia
>> >>> Assistive technology that understands you
>> >>> ......................................................................
>> >>>
>> >>>
>> >>>
>> >>> ------------------------------------------------------------------------------
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>> >>> The most comprehensive online learning library for Microsoft
>> >>> developers
>> >>> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3,
>> >>> MVC3,
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>> >>>
>> >>
>> >>
>> >>
>> >> ------------------------------------------------------------------------------
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>> >
>> >
>> >
>> > --
>> > Regards,
>> > Robert Iakobashvili, Ph.D.
>> >
>> > Home: http://www.ghotit.com
>> > Blog: http://www.ghotit.com/category/ghotit-blogs/
>> > Twitter: http://twitter.com/ghotit
>> > Facebook: http://facebook.com/ghotit
>> > ......................................................................
>> > Ghotit Dyslexia
>> > Assistive technology that understands you
>> > ......................................................................
>>
>>
>>
>> --
>> Regards,
>> Robert Iakobashvili, Ph.D.
>>
>> Home: http://www.ghotit.com
>> Blog: http://www.ghotit.com/category/ghotit-blogs/
>> Twitter: http://twitter.com/ghotit
>> Facebook: http://facebook.com/ghotit
>> ......................................................................
>> Ghotit Dyslexia
>> Assistive technology that understands you
>> ......................................................................
>>
>>
>> ------------------------------------------------------------------------------
>> Try before you buy = See our experts in action!
>> The most comprehensive online learning library for Microsoft developers
>> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
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>> _______________________________________________
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>> https://lists.sourceforge.net/lists/listinfo/curl-loader-devel
>
>
>
> ------------------------------------------------------------------------------
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--
Regards,
Robert Iakobashvili, Ph.D.
Home: http://www.ghotit.com
Blog: http://www.ghotit.com/category/ghotit-blogs/
Twitter: http://twitter.com/ghotit
Facebook: http://facebook.com/ghotit
......................................................................
Ghotit Dyslexia
Assistive technology that understands you
......................................................................
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