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Bryan Call edited comment on TS-3016 at 8/19/14 5:24 PM: --------------------------------------------------------- This is how PFS should be implemented and how other servers implement PFS. was (Author: bcall): This is how PFS should be implemented and how other server implement PFS. > High CPU in 5.0 > --------------- > > Key: TS-3016 > URL: https://issues.apache.org/jira/browse/TS-3016 > Project: Traffic Server > Issue Type: Bug > Components: Core > Reporter: Sudheer Vinukonda > Fix For: 5.1.0 > > > After 5.0 roll out, our production systems are noticing much higher cpu > compared to pre-upgrade ats4 cpu usage. > For example, on some of our hosts running 8 hosts, below is the comparison > before and after the upgade: > {code} > cpu %util: 88.7% (version: ats5) > cpu %util: 70% (version: ats4) > {code} > Running perf top on traffic_server shows most CPU spent in SSL api calls, > initially causing us to suspect any SSL related changes. However, after some > analysis, it looks like the issue might be caused by the changes made in > TS-1365. After reverting the changes in TS-1365, the CPU usage comes back to > pre-upgrade levels again. > {code} > ats5: > ------ > Samples: 374K of event 'cycles', Event count (approx.): 29126701697 > 26.44% libcrypto.so.1.0.1e [.] bn_sqr4x_mont > 16.26% libcrypto.so.1.0.1e [.] bn_mul_mont <------ > 6.74% libcrypto.so.1.0.1e [.] bn_mul4x_mont_gather5 > 4.95% libcrypto.so.1.0.1e [.] BN_usub > 1.54% libcrypto.so.1.0.1e [.] sha256_block_data_order > 1.37% libcrypto.so.1.0.1e [.] BN_mod_mul_montgomery > 80.89 libcrypto.so.1.0.1e > 7.09 traffic_server > 5.02 [kernel] > 2.71 libc-2.12.so > 0.59 libpthread-2.12.so > 0.42 libssl.so.1.0.1e > 0.32 libtsutil.so.5 > 0.32 [bnx2] > 0.02 libstdc++.so.6.0.13 > 0.02 libpcre.so.0.0.1 > 0.01 quick_filter.so > 0.01 libtcl8.5.so > 0.01 librt-2.12.so > 0.01 [kernel].vsyscall_fn > 0.01 [kernel].vsyscall_1 > 0 regex_remap.so > 0 libresolv-2.12.so > 0 libgtlocip.so.1.7.4.B86 > 0 header_rewrite.so > 0 conf_remap.so > 0 [sd_mod] > 0 [mpt2sas] > 0 [kernel].vsyscall_0 > 0 [jbd] > 0 [ipv6] > 0 [ext3] > 0 [dm_mod] > ats4: > ----- > Samples: 249K of event 'cycles', Event count (approx.): 18282595621 > 39.34% libcrypto.so.1.0.1e [.] bn_sqr4x_mont > 10.23% libcrypto.so.1.0.1e [.] bn_mul4x_mont_gather5 > 6.25% libcrypto.so.1.0.1e [.] bn_mul_mont <------ > 2.19% libcrypto.so.1.0.1e [.] sha256_block_data_order > 2.03% libcrypto.so.1.0.1e [.] BN_usub > 1.50% [kernel] [k] find_busiest_group > 1.08% libcrypto.so.1.0.1e [.] sha1_block_data_order_ssse3 > 80.93 libcrypto.so.1.0.1e > 6.9 [kernel] > 4.96 traffic_server > 3 libc-2.12.so > 0.84 libpthread-2.12.so > 0.81 libssl.so.1.0.1e > 0.38 [bnx2] > 0.32 libtsutil.so.4 > 0.02 libtcl8.5.so > 0.02 librt-2.12.so > 0.02 libpcre.so.0.0.1 > 0.02 [kernel].vsyscall_fn > 0.01 quick_filter.so > 0.01 [kernel].vsyscall_1 > 0.01 [kernel].vsyscall_0 > 0 regex_remap.so > 0 libstdc++.so.6.0.13 > 0 libresolv-2.12.so > 0 header_rewrite.so > 0 conf_remap.so > 0 [sd_mod] > 0 [mpt2sas] > 0 [jbd] > 0 [ipv6] > 0 [ext3] > 0 [dm_mod] > {code} -- This message was sent by Atlassian JIRA (v6.2#6252)