10f2864111
This new setting allows configuration of CFS period on the CPU cgroup, instead of using a hardcoded default of 100ms. Tested: - Legacy cgroup + Unified cgroup - systemctl set-property - systemctl show - Confirmed that the cgroup settings (such as cpu.cfs_period_ns) were set appropriately, including updating the CPU quota (cpu.cfs_quota_ns) when CPUQuotaPeriodSec= is updated. - Checked that clamping works properly when either period or (quota * period) are below the resolution of 1ms, or if period is above the max of 1s.
39 lines
2.4 KiB
C
39 lines
2.4 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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#include "cgroup.h"
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#include "log.h"
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static void test_cgroup_cpu_adjust_period(void) {
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log_info("/* %s */", __func__);
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/* Period 1ms, quota 40% -> Period 2.5ms */
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assert_se(2500 == cgroup_cpu_adjust_period(USEC_PER_MSEC, 400 * USEC_PER_MSEC, USEC_PER_MSEC, USEC_PER_SEC));
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/* Period 10ms, quota 10% -> keep. */
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assert_se(10 * USEC_PER_MSEC == cgroup_cpu_adjust_period(10 * USEC_PER_MSEC, 100 * USEC_PER_MSEC, USEC_PER_MSEC, USEC_PER_SEC));
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/* Period 1ms, quota 1000% -> keep. */
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assert_se(USEC_PER_MSEC == cgroup_cpu_adjust_period(USEC_PER_MSEC, 10000 * USEC_PER_MSEC, USEC_PER_MSEC, USEC_PER_SEC));
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/* Period 100ms, quota 30% -> keep. */
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assert_se(100 * USEC_PER_MSEC == cgroup_cpu_adjust_period(100 * USEC_PER_MSEC, 300 * USEC_PER_MSEC, USEC_PER_MSEC, USEC_PER_SEC));
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/* Period 5s, quota 40% -> adjust to 1s. */
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assert_se(USEC_PER_SEC == cgroup_cpu_adjust_period(5 * USEC_PER_SEC, 400 * USEC_PER_MSEC, USEC_PER_MSEC, USEC_PER_SEC));
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/* Period 2s, quota 250% -> adjust to 1s. */
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assert_se(USEC_PER_SEC == cgroup_cpu_adjust_period(2 * USEC_PER_SEC, 2500 * USEC_PER_MSEC, USEC_PER_MSEC, USEC_PER_SEC));
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/* Period 10us, quota 5,000,000% -> adjust to 1ms. */
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assert_se(USEC_PER_MSEC == cgroup_cpu_adjust_period(10, 50000000 * USEC_PER_MSEC, USEC_PER_MSEC, USEC_PER_SEC));
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/* Period 10ms, quota 50,000% -> keep. */
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assert_se(10 * USEC_PER_MSEC == cgroup_cpu_adjust_period(10 * USEC_PER_MSEC, 500000 * USEC_PER_MSEC, USEC_PER_MSEC, USEC_PER_SEC));
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/* Period 10ms, quota 1% -> adjust to 100ms. */
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assert_se(100 * USEC_PER_MSEC == cgroup_cpu_adjust_period(10 * USEC_PER_MSEC, 10 * USEC_PER_MSEC, USEC_PER_MSEC, USEC_PER_SEC));
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/* Period 10ms, quota .001% -> adjust to 1s. */
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assert_se(1 * USEC_PER_SEC == cgroup_cpu_adjust_period(10 * USEC_PER_MSEC, 10, USEC_PER_MSEC, USEC_PER_SEC));
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/* Period 0ms, quota 200% -> adjust to 1ms. */
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assert_se(1 * USEC_PER_MSEC == cgroup_cpu_adjust_period(0, 2 * USEC_PER_SEC, USEC_PER_MSEC, USEC_PER_SEC));
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/* Period 0ms, quota 40% -> adjust to 2.5ms. */
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assert_se(2500 == cgroup_cpu_adjust_period(0, 400 * USEC_PER_MSEC, USEC_PER_MSEC, USEC_PER_SEC));
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}
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int main(int argc, char *argv[]) {
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test_cgroup_cpu_adjust_period();
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return 0;
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}
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