test__perf_time_to_tsc(9)

✨ test__perf_time_to_tsc(9) ✨

okay bestie, welcome to the Kernel API Manual 💖 this one's a little tiny baby page from test__perf_time_to_tsc(9) and honestly it's giving "short but crucial" energy. let's get into it 🫶

---

💅 NAME 💅

test__perf_time_to_tsc — literally just a test for converting perf time to TSC 🌸

---

🦋 SYNOPSIS 🦋

int test__perf_time_to_tsc (struct test_suite *test , int subtest );

like, that's the whole signature, copy it exactly please, no cap 🔥

---

🎀 ARGUMENTS 🎀

• test — undescribed 🙈 the manpage literally says -- undescribed --, so we're not gonna invent lore, okay?
• subtest — undescribed 😭 same situation, iconically undescribed, we respect it

ngl bestie, both of these are marked -- undescribed -- in the source page and we are NOT gonna make stuff up 💀

---

👑 DESCRIPTION 👑

so this function 👏 implements 👏 a 👏 test 👏 — and what it checks is that the conversion of perf time to and from TSC stays consistent with the order of events ⭐ like, the timeline has to actually make sense, that's the vibe check.

• if the test passes, 0 is returned ✨
• otherwise, -1 is returned 💀

and here's the lil plot twist 🍓: if TSC conversion is not supported, the test still passes, but the string " (not supported)" gets printed. so like, it's fine, but it's telling on itself fr fr 🙈

---

🌈 SEE ALSO 🌈

• Kernel file ./tools/perf/tests/perf-time-to-tsc.c 🦋 — go read the source, iykyk 💜

---

aaaaand that's the whole page bestie, short and sweet, main character energy only 💅✨ sources say this one lives under ./tools/perf/tests and it's dated October 2026 — so yeah, that's the version tea, mwah 🎀💖🫶