bryancall edited a comment on pull request #7576:
URL: https://github.com/apache/trafficserver/pull/7576#issuecomment-808606616
With this patch LogObject::_checkout_write doesn't use much CPU anymore.
```
**http2load**
finished in 33.10s, 181277.48 req/s, 2.77GB/s
requests: 6000000 total, 6000000 started, 6000000 done, 6000000 succeeded, 0
failed, 0 errored, 0 timeout
status codes: 6000000 2xx, 0 3xx, 0 4xx, 0 5xx
traffic: 91.75GB (98514111221) total, 45.88MB (48105141) headers (space
savings 96.66%), 91.55GB (98304000000) data
min max mean sd +/- sd
time for request: 83us 54.32ms 1.04ms 690us 93.72%
time for connect: 10.70ms 307.99ms 94.83ms 79.36ms 75.00%
time to 1st byte: 40.72ms 310.73ms 114.99ms 71.51ms 76.00%
req/s : 864.28 1073.49 934.15 70.05 70.00%
**dstat**
You did not select any stats, using -cdngy by default.
ESC[7l----total-cpu-usage---- -dsk/total- ---net/lo-- -net/total-
---paging-- ---system--
usr sys idl wai hiq siq| read writ| recv send: recv send| in out | int
csw
1 0 99 0 0 0|2813B 243k| 0 0 : 0 0 | 0 0 |
21k 60k
16 20 62 0 0 1| 296k 18M|2777M 2777M:1542B 817B| 0 0 |
745k 1163k
16 22 61 0 0 1| 410B 48M|2977M 2977M:2846B 1507B| 0 0 |
769k 1162k
15 21 62 0 0 1| 0 63k|2965M 2965M:4500B 12k| 0 0 |
763k 1194k
**perf report**
# Total Lost Samples: 0
#
# Samples: 9M of event 'cycles'
# Event count (approx.): 5588002519667
#
# Overhead Shared Object Symbol
# .......... ....................
..................................................
#
31.33% [kernel.vmlinux] [k] native_queued_spin_lock_slowpath
3.22% [kernel.vmlinux] [k] copy_user_generic_string
2.08% [kernel.vmlinux] [k] acpi_processor_ffh_cstate_enter
1.88% libc-2.17.so [.] __memcpy_ssse3
1.88% libcrypto.so.1.1 [.] _aesni_ctr32_ghash_6x
1.61% libtscore.so.9.0.1 [.] malloc_new
1.12% libtscore.so.9.0.1 [.] malloc_free
0.89% libtscore.so.9.0.1 [.] ink_freelist_new
0.87% libpthread-2.17.so [.] pthread_mutex_lock
0.86% traffic_server [.] LogObject::_checkout_write
0.86% libc-2.17.so [.] _int_malloc
0.72% [kernel.vmlinux] [k] futex_wait_setup
0.70% [kernel.vmlinux] [k] __switch_to
0.66% [kernel.vmlinux] [k] try_to_wake_up
```
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