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Re: [tor-bugs] #4626 [Tor Directory Authority]: Very high cpu usage for gabelmoo running master
#4626: Very high cpu usage for gabelmoo running master
-------------------------------------+--------------------------------------
Reporter: Sebastian | Owner:
Type: defect | Status: needs_review
Priority: major | Milestone: Tor: 0.2.3.x-final
Component: Tor Directory Authority | Version:
Keywords: | Parent:
Points: | Actualpoints:
-------------------------------------+--------------------------------------
Comment(by Sebastian):
So, unfortunately the patch doesn't seem to work for me, not even when I
applied it directly on top of the (suspected) faulty commit and ran that.
But here's something very interesting: this is a profile of the commit
directly before 44619d5e4, where the cpu usage stays below 10% typically
{{{
288491 51.1032 tor tor
bn_mul_mont
31541 5.5872 tor tor
_x86_64_AES_encrypt_compact
30061 5.3250 libz.so.1.2.5 tor
deflate_slow
18985 3.3630 libz.so.1.2.5 tor
build_tree
14140 2.5048 tor tor
sha1_block_data_order
13043 2.3104 libc-2.11.2.so tor
_int_malloc
9262 1.6407 tor tor
_x86_64_AES_decrypt_compact
8564 1.5170 tor tor
tor_memeq
7717 1.3670 tor tor
BN_mod_exp_mont_consttime
6585 1.1665 tor tor
connection_bucket_refill
5682 1.0065 libc-2.11.2.so tor
strcasecmp
3646 0.6459 libz.so.1.2.5 tor
fill_window
3573 0.6329 libc-2.11.2.so tor memcpy
3544 0.6278 libz.so.1.2.5 tor
compress_block
3124 0.5534 libc-2.11.2.so tor memmem
3007 0.5327 tor tor
digestmap_get
2703 0.4788 tor tor
BN_mod_mul_montgomery
2394 0.4241 libz.so.1.2.5 tor
send_tree
2268 0.4018 libz.so.1.2.5 tor
_tr_flush_block
2106 0.3731 libc-2.11.2.so tor
_int_free
2090 0.3702 tor tor
digestmap_iter_get
1935 0.3428 libc-2.11.2.so tor memset
1902 0.3369 tor tor
bn_mul_add_words
1870 0.3313 tor tor
MOD_EXP_CTIME_COPY_TO_PREBUF
1727 0.3059 tor tor
aes_crypt_inplace
1588 0.2813 tor tor
md5_block_asm_data_order
1522 0.2696 tor tor
dirserv_orconn_tls_done
1488 0.2636 tor tor
buf_datalen
1469 0.2602 libc-2.11.2.so tor
malloc_consolidate
1348 0.2388 tor tor
ssl_cipher_apply_rule
1251 0.2216 libc-2.11.2.so tor free
1122 0.1988 tor tor
connection_or_set_bad_connections
1089 0.1929 libc-2.11.2.so tor
vfprintf
1077 0.1908 libc-2.11.2.so tor malloc
1063 0.1883 libz.so.1.2.5 tor
adler32
1062 0.1881 libevent-2.1.so.1.0.0 tor
event_base_loop
930 0.1647 tor tor BN_div
893 0.1582 tor tor
ap_stream_wants_exit_attention
886 0.1569 tor tor
AES_cbc_encrypt
882 0.1562 tor tor
EVP_MD_CTX_cleanup
}}}
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4626#comment:12>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
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