Disable folly memcpy as default memcpy

[solotzg]

What problem does this PR solve?

Issue Number: close #5949

Problem Summary:

since #5834

MemUtils benchmark show that __folly_memcpy is not friendly
When memory size > 32K(L1 cache size) and both address are aligned to 32, __folly_memcpy will use non-temporal way(mark data unlikely to be used again soon) to minimize caching. It causes big performance regression.

tiflash/libs/libmemcpy/folly/memcpy.S

Lines 329 to 353 in bd16255

	.L_NON_TEMPORAL_LOOP:
	testb $31, %sil
	jne .L_ALIGNED_DST_LOOP
	// This is prefetching the source data unlike ALIGNED_DST_LOOP which
	// prefetches the destination data. This choice is again informed by
	// benchmarks. With a non-temporal store the entirety of the cache line
	// is being written so the previous data can be discarded without being
	// fetched.
	prefetchnta 128(%rsi)
	prefetchnta 196(%rsi)
	vmovntdqa (%rsi), %ymm0
	vmovntdqa 32(%rsi), %ymm1
	vmovntdqa 64(%rsi), %ymm2
	vmovntdqa 96(%rsi), %ymm3
	add $128, %rsi
	vmovntdq %ymm0, (%rdi)
	vmovntdq %ymm1, 32(%rdi)
	vmovntdq %ymm2, 64(%rdi)
	vmovntdq %ymm3, 96(%rdi)
	add $128, %rdi
	cmp %r8, %rsi
	jb .L_NON_TEMPORAL_LOOP

What is changed and how it works?

For b232bcd, the result is

20220922,constant,incremental,0.49,200478,1747997

---

Before this PR

+ ./tiflash dtworkload --write_key_distribution=incremental --verify_round=20
20220922,constant,incremental,0.53,188916,1720491

After this PR

+ ./tiflash dtworkload --write_key_distribution=incremental --verify_round=20
20220922,constant,incremental,0.44,207025,1685328

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code

Side effects

• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Breaking backward compatibility

Documentation

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Changes MySQL compatibility

Release note

None

[ti-chi-bot]

[REVIEW NOTIFICATION]

This pull request has been approved by:

• JinheLin
• zanmato1984

To complete the pull request process, please ask the reviewers in the list to review by filling /cc @reviewer in the comment.
After your PR has acquired the required number of LGTMs, you can assign this pull request to the committer in the list by filling /assign @committer in the comment to help you merge this pull request.

The full list of commands accepted by this bot can be found here.

Reviewer can indicate their review by submitting an approval review.
Reviewer can cancel approval by submitting a request changes review.

[JinheLin]

LGTM

[zanmato1984]

LGTM

[JinheLin]

/merge

[ti-chi-bot]

@JinheLin: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

You only need to trigger /merge once, and if the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

If you have any questions about the PR merge process, please refer to pr process.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[ti-chi-bot]

This pull request has been accepted and is ready to merge.

Commit hash: 4dccd63

[solotzg]

/hold

[solotzg]

/merge

[ti-chi-bot]

@solotzg: It seems you want to merge this PR, I will help you trigger all the tests:

/run-all-tests

You only need to trigger /merge once, and if the CI test fails, you just re-trigger the test that failed and the bot will merge the PR for you after the CI passes.

If you have any questions about the PR merge process, please refer to pr process.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the ti-community-infra/tichi repository.

[solotzg]

/unhold

[sre-bot]

Coverage for changed files

no c/c++ source change detected

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
18710      7920             57.67%    218347  81796        62.54%

full coverage report (for internal network access only)

[ti-chi-bot]

In response to a cherrypick label: new pull request created: #6001.

[sre-bot]

Coverage for changed files

no c/c++ source change detected

Coverage summary

Functions  MissedFunctions  Executed  Lines   MissedLines  Cover
18850      8116             56.94%    218924  83416        61.90%

full coverage report (for internal network access only)