Lines Matching +full:skew +full:- +full:delay

1 // SPDX-License-Identifier: GPL-2.0+
18 #include <linux/delay.h>
22 #include "tick-internal.h"
41 	.name			= "wdtest-jiffies",
62 		udelay(cs->uncertainty_margin / 250);  in wdtest_ktime_read()
63 		WRITE_ONCE(wdtest_ktime_read_ndelays, wkrn - 1);  in wdtest_ktime_read()
67 		sign = -sign;  in wdtest_ktime_read()
75 	pr_info("--- Marking %s unstable due to clocksource watchdog.\n", cs->name);  in wdtest_ktime_cs_mark_unstable()
84 	.name			= "wdtest-ktime",
114 	 * Verify that jiffies-like clocksources get the manually  in wdtest_func()
117 	pr_info("--- Verify jiffies-like uncertainty margin.\n");  in wdtest_func()
129 	 * Verify that tsc-like clocksources are assigned a reasonable  in wdtest_func()
132 	pr_info("--- Verify tsc-like uncertainty margin.\n");  in wdtest_func()
139 	pr_info("--- tsc-like times: %lu - %lu = %lu.\n", j2, j1, j2 - j1);  in wdtest_func()
141 		  "Expected at least 1000ns, got %lu.\n", j2 - j1);  in wdtest_func()
143 	/* Verify tsc-like stability with various numbers of errors injected. */  in wdtest_func()
151 			s = ", expect clock skew";  in wdtest_func()
152 		pr_info("--- Watchdog with %dx error injection, %d retries%s.\n", i, max_retries, s);  in wdtest_func()
161 	/* Verify tsc-like stability with clock-value-fuzz error injection. */  in wdtest_func()
162 …pr_info("--- Watchdog clock-value-fuzz error injection, expect clock skew and per-CPU mismatches.\…  in wdtest_func()
171 	pr_info("--- Done with test.\n");  in wdtest_func()
177 	pr_alert("--- holdoff=%d\n", holdoff);  in wdtest_print_module_parms()
191 	/* Create watchdog-test task. */  in clocksource_wdtest_init()