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: Fred H. <di...@gm...> - 2012-03-06 16:17:26
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1. the major CPU consumer is curl-loader. here is the top:
top - 07:36:36 up 23:31, 5 users, load average: 4.32, 2.26, 0.91
Tasks: 237 total, 2 running, 235 sleeping, 0 stopped, 0 zombie
Cpu0 : 76.6%us, 3.6%sy, 0.0%ni, 19.4%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%
Cpu1 : 72.4%us, 4.0%sy, 0.0%ni, 22.9%id, 0.0%wa, 0.0%hi, 0.7%si, 0.0%
Cpu2 : 65.8%us, 3.3%sy, 0.0%ni, 30.6%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%
Cpu3 : 75.2%us, 4.3%sy, 0.0%ni, 19.5%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%
Cpu4 : 79.1%us, 4.0%sy, 0.0%ni, 16.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%
Cpu5 : 75.8%us, 4.3%sy, 0.0%ni, 19.2%id, 0.0%wa, 0.0%hi, 0.7%si, 0.0%
Cpu6 : 74.1%us, 5.0%sy, 0.0%ni, 20.3%id, 0.0%wa, 0.0%hi, 0.7%si, 0.0%
Cpu7 : 78.7%us, 4.0%sy, 0.0%ni, 16.6%id, 0.0%wa, 0.0%hi, 0.7%si, 0.0%
Mem: 16209932k total, 3829500k used, 12380432k free, 99112k buffers
Swap: 18448376k total, 0k used, 18448376k free, 320284k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
30795 root 20 0 3200m 2.8g 2296 S *79.2* 18.4 21:26.84 curl-loader
1832 nobody 20 0 13944 1736 580 S 0.1 0.0 0:32.65 dnsmasq
9 root 20 0 0 0 0 S 0.0 0.0 0:00.53 ksoftirqd/1
30825 root 20 0 15220 1360 960 R 0.0 0.0 0:00.42 top
1 root 20 0 19400 1568 1256 S 0.0 0.0 0:00.75 init
2 root 20 0 0 0 0 S 0.0 0.0 0:00.00 kthreadd
3 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
4 root 20 0 0 0 0 S 0.0 0.0 0:00.06 ksoftirqd/0
5 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
2. 1000 loading clients
3. yes, tried 0.52 but no lucky -- CAPS 380, throughput 200Mbps, CPU 90%
top - 08:17:10 up 1 day, 12 min, 8 users, load average: 4.66, 3.39, 1.88
Tasks: 245 total, 2 running, 243 sleeping, 0 stopped, 0 zombie
Cpu0 : 82.2%us, 4.0%sy, 0.0%ni, 13.9%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%
Cpu1 : 86.1%us, 4.3%sy, 0.0%ni, 7.9%id, 0.0%wa, 0.0%hi, 1.7%si, 0.0%
Cpu2 : 85.3%us, 4.0%sy, 0.0%ni, 10.0%id, 0.0%wa, 0.0%hi, 0.7%si, 0.0%
Cpu3 : 81.8%us, 3.0%sy, 0.0%ni, 14.2%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%
Cpu4 : 83.7%us, 4.0%sy, 0.0%ni, 12.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%
Cpu5 : 92.7%us, 3.3%sy, 0.0%ni, 3.3%id, 0.0%wa, 0.0%hi, 0.7%si, 0.0%
Cpu6 : 89.7%us, 2.0%sy, 0.0%ni, 8.0%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%
Cpu7 : 88.1%us, 3.6%sy, 0.0%ni, 6.6%id, 0.0%wa, 0.0%hi, 1.7%si, 0.0%
Mem: 16209932k total, 1795748k used, 14414184k free, 102824k buffers
Swap: 18448376k total, 0k used, 18448376k free, 382988k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
12236 root 20 0 1150m 894m 2572 S 90.7 5.7 51:11.91 curl-loader
1832 nobody 20 0 13944 1736 580 S 0.1 0.0 0:47.04 dnsmasq
]# 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
43.92 151.95 151.95 157295 0.00 0.00
Curl_hash_clean_with_criterium
22.90 231.17 79.22 1712190971 0.00 0.00
hostcache_timestamp_remove
13.15 276.68 45.51 3260321 0.00 0.00 Curl_hash_pick
7.51 302.65 25.97 394171 0.00 0.00 Curl_hash_add
5.98 323.34 20.68 567437518 0.00 0.00 Curl_str_key_compare
1.00 326.80 3.46 5380220 0.00 0.00 dprintf_formatf
0.41 328.21 1.41 locking_function
0.32 329.32 1.11 469222138 0.00 0.00 ares__is_list_empty
0.31 330.40 1.08 3284508 0.00 0.00 multi_runsingle
0.28 331.38 0.98 10006806 0.00 0.00
client_tracing_function
0.24 332.21 0.83 151951 0.00 0.00 Curl_num_addresses
0.22 332.97 0.77 188075672 0.00 0.00 addbyter
0.19 333.64 0.67 841840 0.00 0.00 Curl_readwrite
0.19 334.29 0.65 id_function
0.18 334.90 0.61 39843 0.00 0.01 curl_multi_socket_all
4. yes, it is correct for 0.56. If use same URL list by replacing https to
http, I can get CAPS 1500 and throughput 870Mbps with CPU% < 60%
2012/3/6 Robert Iakobashvili <cor...@gm...>
> 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!
> >> >>>> The most comprehensive online learning library for Microsoft
> >> >>>> developers
> >> >>>> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3,
> >> >>>> MVC3,
> >> >>>> Metro Style Apps, more. Free future releases when you subscribe
> now!
> >> >>>> http://p.sf.net/sfu/learndevnow-dev2
> >> >>>> _______________________________________________
> >> >>>> curl-loader-devel mailing list
> >> >>>> cur...@li...
> >> >>>> https://lists.sourceforge.net/lists/listinfo/curl-loader-devel
> >> >>>>
> >> >>>
> >> >>>
> >> >>>
> >> >>> --
> >> >>> 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,
> >> >>> Metro Style Apps, more. Free future releases when you subscribe now!
> >> >>> http://p.sf.net/sfu/learndevnow-dev2
> >> >>> _______________________________________________
> >> >>> curl-loader-devel mailing list
> >> >>> cur...@li...
> >> >>> https://lists.sourceforge.net/lists/listinfo/curl-loader-devel
> >> >>>
> >> >>
> >> >>
> >> >>
> >> >>
> ------------------------------------------------------------------------------
> >> >> 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,
> >> >> Metro Style Apps, more. Free future releases when you subscribe now!
> >> >> http://p.sf.net/sfu/learndevnow-dev2
> >> >> _______________________________________________
> >> >> curl-loader-devel mailing list
> >> >> cur...@li...
> >> >> https://lists.sourceforge.net/lists/listinfo/curl-loader-devel
> >> >>
> >> >
> >> >
> >> >
> >> > --
> >> > 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,
> >> Metro Style Apps, more. Free future releases when you subscribe now!
> >> http://p.sf.net/sfu/learndevnow-dev2
> >> _______________________________________________
> >> curl-loader-devel mailing list
> >> cur...@li...
> >> https://lists.sourceforge.net/lists/listinfo/curl-loader-devel
> >
> >
> >
> >
> ------------------------------------------------------------------------------
> > Keep Your Developer Skills Current with LearnDevNow!
> > 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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> > _______________________________________________
> > curl-loader-devel mailing list
> > cur...@li...
> > https://lists.sourceforge.net/lists/listinfo/curl-loader-devel
> >
>
>
>
> --
> 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
> ......................................................................
>
>
> ------------------------------------------------------------------------------
> Keep Your Developer Skills Current with LearnDevNow!
> The most comprehensive online learning library for Microsoft developers
> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
> Metro Style Apps, more. Free future releases when you subscribe now!
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