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bh=BvjuRtWo050xPXsgTFFwYa3Pxgz0X14YXS2BCPIBTTw=; b=Jm+mmif1QHz9p1V9PEZ1jxGrK4 BsOKUFbl+GDj7qihxO8w+rf7OMEODZK2USA+UtM12dOCjpENqBaJMxFf+7BGsi7Ev094AUYcxmq0C BX1pKj6MPKCIWsCZaJ3PckCIRxS6h547/ZfO5bEFsaGlMDz/VnARYS+JWc0WtL8Hz2jIhpX9m0D9W plBaUUGKDEiaOKfamtYinCJIB4jLUijkuTtrHp08Eb1f5NQ8I7+TuBiRGDEPpS/2FvEck7ZteBSAz /sX8ftF70dbiX+d7WpeSQdo7fruRrIcjDxRU/bQDDgZcm7Jgx11EoPtcJyDUANIXD1WezAPSUYB8z oLms/DIA==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1qjnEs-00GXzA-2q; Fri, 22 Sep 2023 20:59:05 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 0) id E76B630058C; Fri, 22 Sep 2023 22:59:03 +0200 (CEST) Message-Id: <20230922205449.808782861@infradead.org> User-Agent: quilt/0.65 Date: Fri, 22 Sep 2023 22:01:21 +0200 From: Peter Zijlstra To: tglx@linutronix.de, axboe@kernel.dk Cc: linux-kernel@vger.kernel.org, peterz@infradead.org, mingo@redhat.com, dvhart@infradead.org, dave@stgolabs.net, andrealmeid@igalia.com, Andrew Morton , urezki@gmail.com, hch@infradead.org, lstoakes@gmail.com, Arnd Bergmann , linux-api@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, malteskarupke@web.de, steve.shaw@intel.com, marko.makela@mariadb.com, andrei.artemev@intel.com Subject: [PATCH 15/15] futex,selftests: Extend the futex selftests References: <20230921104505.717750284@noisy.programming.kicks-ass.net> <20230921104505.717750284@noisy.programming.kicks-ass.net> <20230922200120.011184118@infradead.org> MIME-Version: 1.0 X-Rspam-User: X-Rspamd-Server: rspam06 X-Rspamd-Queue-Id: A1A79A002F X-Stat-Signature: yw7zo34ppy6uej6zje1t15o81efa4z7a X-HE-Tag: 1695416363-977893 X-HE-Meta: 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 wultlT34 4qO8LGPRz6Zeyygy3cPt8c4zNylcwzL077i2YeYPGVaOQZg5FsV4XtJCkIaFUMFLljQLY5O2GW7HNfFVoMpiKrQCRh5kLtgAOjiozc/F4gb/NVzcWRKyVRHY5cwSI/YsIp9gQMptW/+7Cfhi5ojn1BniB7ISYdaQ11H+ZBH3oIHAOFUOAj6p88kmnii8AzUnnBs3Jt+Jpo39nfXhbegrC6J6O6wWEPbSBY0zJUfBRaaKiAoY= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Extend the wait/requeue selftests to also cover the futex2 syscalls. Signed-off-by: Peter Zijlstra (Intel) --- tools/testing/selftests/futex/functional/futex_requeue.c | 100 +++++++++- tools/testing/selftests/futex/functional/futex_wait.c | 56 ++++- tools/testing/selftests/futex/functional/futex_wait_timeout.c | 16 + tools/testing/selftests/futex/functional/futex_wait_wouldblock.c | 28 ++ tools/testing/selftests/futex/functional/futex_waitv.c | 15 - tools/testing/selftests/futex/functional/run.sh | 6 tools/testing/selftests/futex/include/futex2test.h | 52 +++++ 7 files changed, 243 insertions(+), 30 deletions(-) --- a/tools/testing/selftests/futex/functional/futex_requeue.c +++ b/tools/testing/selftests/futex/functional/futex_requeue.c @@ -7,8 +7,10 @@ #include #include +#include #include "logging.h" #include "futextest.h" +#include "futex2test.h" #define TEST_NAME "futex-requeue" #define timeout_ns 30000000 @@ -16,24 +18,58 @@ volatile futex_t *f1; +bool futex2 = 0; +bool mixed = 0; + void usage(char *prog) { printf("Usage: %s\n", prog); printf(" -c Use color\n"); + printf(" -n Use futex2 interface\n"); + printf(" -x Use mixed size futex\n"); printf(" -h Display this help message\n"); printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n", VQUIET, VCRITICAL, VINFO); } -void *waiterfn(void *arg) +static void *waiterfn(void *arg) { + unsigned int flags = 0; struct timespec to; - to.tv_sec = 0; - to.tv_nsec = timeout_ns; + if (futex2) { + unsigned long mask; + + if (clock_gettime(CLOCK_MONOTONIC, &to)) { + printf("clock_gettime() failed errno %d", errno); + return NULL; + } + + to.tv_nsec += timeout_ns; + if (to.tv_nsec >= 1000000000) { + to.tv_sec++; + to.tv_nsec -= 1000000000; + } + + if (mixed) { + flags |= FUTEX2_SIZE_U16; + mask = (unsigned short)(~0U); + } else { + flags |= FUTEX2_SIZE_U32; + mask = (unsigned int)(~0U); + } + + if (futex2_wait(f1, *f1, mask, flags, + &to, CLOCK_MONOTONIC)) + printf("waiter failed errno %d\n", errno); + } else { + + to.tv_sec = 0; + to.tv_nsec = timeout_ns; - if (futex_wait(f1, *f1, &to, 0)) - printf("waiter failed errno %d\n", errno); + if (futex_wait(f1, *f1, &to, flags)) + printf("waiter failed errno %d\n", errno); + } return NULL; } @@ -48,7 +84,7 @@ int main(int argc, char *argv[]) f1 = &_f1; - while ((c = getopt(argc, argv, "cht:v:")) != -1) { + while ((c = getopt(argc, argv, "xncht:v:")) != -1) { switch (c) { case 'c': log_color(1); @@ -59,6 +95,12 @@ int main(int argc, char *argv[]) case 'v': log_verbosity(atoi(optarg)); break; + case 'x': + mixed=1; + /* fallthrough */ + case 'n': + futex2=1; + break; default: usage(basename(argv[0])); exit(1); @@ -79,7 +121,22 @@ int main(int argc, char *argv[]) usleep(WAKE_WAIT_US); info("Requeuing 1 futex from f1 to f2\n"); - res = futex_cmp_requeue(f1, 0, &f2, 0, 1, 0); + if (futex2) { + struct futex_waitv futexes[2] = { + { + .val = 0, + .uaddr = (unsigned long)f1, + .flags = mixed ? FUTEX2_SIZE_U16 : FUTEX2_SIZE_U32, + }, + { + .uaddr = (unsigned long)&f2, + .flags = FUTEX2_SIZE_U32, + }, + }; + res = futex2_requeue(futexes, 0, 0, 1); + } else { + res = futex_cmp_requeue(f1, 0, &f2, 0, 1, 0); + } if (res != 1) { ksft_test_result_fail("futex_requeue simple returned: %d %s\n", res ? errno : res, @@ -89,7 +146,11 @@ int main(int argc, char *argv[]) info("Waking 1 futex at f2\n"); - res = futex_wake(&f2, 1, 0); + if (futex2) { + res = futex2_wake(&f2, ~0U, 1, FUTEX2_SIZE_U32); + } else { + res = futex_wake(&f2, 1, 0); + } if (res != 1) { ksft_test_result_fail("futex_requeue simple returned: %d %s\n", res ? errno : res, @@ -112,7 +173,22 @@ int main(int argc, char *argv[]) usleep(WAKE_WAIT_US); info("Waking 3 futexes at f1 and requeuing 7 futexes from f1 to f2\n"); - res = futex_cmp_requeue(f1, 0, &f2, 3, 7, 0); + if (futex2) { + struct futex_waitv futexes[2] = { + { + .val = 0, + .uaddr = (unsigned long)f1, + .flags = mixed ? FUTEX2_SIZE_U16 : FUTEX2_SIZE_U32, + }, + { + .uaddr = (unsigned long)&f2, + .flags = FUTEX2_SIZE_U32, + }, + }; + res = futex2_requeue(futexes, 0, 3, 7); + } else { + res = futex_cmp_requeue(f1, 0, &f2, 3, 7, 0); + } if (res != 10) { ksft_test_result_fail("futex_requeue many returned: %d %s\n", res ? errno : res, @@ -121,7 +197,11 @@ int main(int argc, char *argv[]) } info("Waking INT_MAX futexes at f2\n"); - res = futex_wake(&f2, INT_MAX, 0); + if (futex2) { + res = futex2_wake(&f2, ~0U, INT_MAX, FUTEX2_SIZE_U32); + } else { + res = futex_wake(&f2, INT_MAX, 0); + } if (res != 7) { ksft_test_result_fail("futex_requeue many returned: %d %s\n", res ? errno : res, --- a/tools/testing/selftests/futex/functional/futex_wait.c +++ b/tools/testing/selftests/futex/functional/futex_wait.c @@ -9,8 +9,10 @@ #include #include #include +#include #include "logging.h" #include "futextest.h" +#include "futex2test.h" #define TEST_NAME "futex-wait" #define timeout_ns 30000000 @@ -19,10 +21,13 @@ void *futex; +bool futex2 = 0; + void usage(char *prog) { printf("Usage: %s\n", prog); printf(" -c Use color\n"); + printf(" -n Use futex2 interface\n"); printf(" -h Display this help message\n"); printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n", VQUIET, VCRITICAL, VINFO); @@ -30,17 +35,35 @@ void usage(char *prog) static void *waiterfn(void *arg) { - struct timespec to; unsigned int flags = 0; + struct timespec to; if (arg) flags = *((unsigned int *) arg); - to.tv_sec = 0; - to.tv_nsec = timeout_ns; + if (futex2) { + if (clock_gettime(CLOCK_MONOTONIC, &to)) { + printf("clock_gettime() failed errno %d", errno); + return NULL; + } - if (futex_wait(futex, 0, &to, flags)) - printf("waiter failed errno %d\n", errno); + to.tv_nsec += timeout_ns; + if (to.tv_nsec >= 1000000000) { + to.tv_sec++; + to.tv_nsec -= 1000000000; + } + + if (futex2_wait(futex, 0, ~0U, flags | FUTEX2_SIZE_U32, + &to, CLOCK_MONOTONIC)) + printf("waiter failed errno %d\n", errno); + } else { + + to.tv_sec = 0; + to.tv_nsec = timeout_ns; + + if (futex_wait(futex, 0, &to, flags)) + printf("waiter failed errno %d\n", errno); + } return NULL; } @@ -55,7 +78,7 @@ int main(int argc, char *argv[]) futex = &f_private; - while ((c = getopt(argc, argv, "cht:v:")) != -1) { + while ((c = getopt(argc, argv, "ncht:v:")) != -1) { switch (c) { case 'c': log_color(1); @@ -66,6 +89,9 @@ int main(int argc, char *argv[]) case 'v': log_verbosity(atoi(optarg)); break; + case 'n': + futex2=1; + break; default: usage(basename(argv[0])); exit(1); @@ -84,7 +110,11 @@ int main(int argc, char *argv[]) usleep(WAKE_WAIT_US); info("Calling private futex_wake on futex: %p\n", futex); - res = futex_wake(futex, 1, FUTEX_PRIVATE_FLAG); + if (futex2) { + res = futex2_wake(futex, ~0U, 1, FUTEX2_SIZE_U32 | FUTEX2_PRIVATE); + } else { + res = futex_wake(futex, 1, FUTEX_PRIVATE_FLAG); + } if (res != 1) { ksft_test_result_fail("futex_wake private returned: %d %s\n", errno, strerror(errno)); @@ -112,7 +142,11 @@ int main(int argc, char *argv[]) usleep(WAKE_WAIT_US); info("Calling shared (page anon) futex_wake on futex: %p\n", futex); - res = futex_wake(futex, 1, 0); + if (futex2) { + res = futex2_wake(futex, ~0U, 1, FUTEX2_SIZE_U32); + } else { + res = futex_wake(futex, 1, 0); + } if (res != 1) { ksft_test_result_fail("futex_wake shared (page anon) returned: %d %s\n", errno, strerror(errno)); @@ -151,7 +185,11 @@ int main(int argc, char *argv[]) usleep(WAKE_WAIT_US); info("Calling shared (file backed) futex_wake on futex: %p\n", futex); - res = futex_wake(shm, 1, 0); + if (futex2) { + res = futex2_wake(shm, ~0U, 1, FUTEX2_SIZE_U32); + } else { + res = futex_wake(shm, 1, 0); + } if (res != 1) { ksft_test_result_fail("futex_wake shared (file backed) returned: %d %s\n", errno, strerror(errno)); --- a/tools/testing/selftests/futex/functional/futex_wait_timeout.c +++ b/tools/testing/selftests/futex/functional/futex_wait_timeout.c @@ -103,7 +103,7 @@ int main(int argc, char *argv[]) struct futex_waitv waitv = { .uaddr = (uintptr_t)&f1, .val = f1, - .flags = FUTEX_32, + .flags = FUTEX2_SIZE_U32, .__reserved = 0 }; @@ -128,7 +128,7 @@ int main(int argc, char *argv[]) } ksft_print_header(); - ksft_set_plan(9); + ksft_set_plan(11); ksft_print_msg("%s: Block on a futex and wait for timeout\n", basename(argv[0])); ksft_print_msg("\tArguments: timeout=%ldns\n", timeout_ns); @@ -201,6 +201,18 @@ int main(int argc, char *argv[]) res = futex_waitv(&waitv, 1, 0, &to, CLOCK_REALTIME); test_timeout(res, &ret, "futex_waitv realtime", ETIMEDOUT); + /* futex2_wait with CLOCK_MONOTONIC */ + if (futex_get_abs_timeout(CLOCK_MONOTONIC, &to, timeout_ns)) + return RET_FAIL; + res = futex2_wait(&f1, f1, 1, FUTEX2_SIZE_U32, &to, CLOCK_MONOTONIC); + test_timeout(res, &ret, "futex2_wait monotonic", ETIMEDOUT); + + /* futex2_wait with CLOCK_REALTIME */ + if (futex_get_abs_timeout(CLOCK_REALTIME, &to, timeout_ns)) + return RET_FAIL; + res = futex2_wait(&f1, f1, 1, FUTEX2_SIZE_U32, &to, CLOCK_REALTIME); + test_timeout(res, &ret, "futex2_wait realtime", ETIMEDOUT); + ksft_print_cnts(); return ret; } --- a/tools/testing/selftests/futex/functional/futex_wait_wouldblock.c +++ b/tools/testing/selftests/futex/functional/futex_wait_wouldblock.c @@ -46,7 +46,7 @@ int main(int argc, char *argv[]) struct futex_waitv waitv = { .uaddr = (uintptr_t)&f1, .val = f1+1, - .flags = FUTEX_32, + .flags = FUTEX2_SIZE_U32 | FUTEX2_PRIVATE, .__reserved = 0 }; @@ -68,7 +68,7 @@ int main(int argc, char *argv[]) } ksft_print_header(); - ksft_set_plan(2); + ksft_set_plan(3); ksft_print_msg("%s: Test the unexpected futex value in FUTEX_WAIT\n", basename(argv[0])); @@ -106,6 +106,30 @@ int main(int argc, char *argv[]) ksft_test_result_pass("futex_waitv\n"); } + if (clock_gettime(CLOCK_MONOTONIC, &to)) { + error("clock_gettime failed\n", errno); + return errno; + } + + to.tv_nsec += timeout_ns; + + if (to.tv_nsec >= 1000000000) { + to.tv_sec++; + to.tv_nsec -= 1000000000; + } + + info("Calling futex2_wait on f1: %u @ %p with val=%u\n", f1, &f1, f1+1); + res = futex2_wait(&f1, f1+1, ~0U, FUTEX2_SIZE_U32 | FUTEX2_PRIVATE, + &to, CLOCK_MONOTONIC); + if (!res || errno != EWOULDBLOCK) { + ksft_test_result_pass("futex2_wait returned: %d %s\n", + res ? errno : res, + res ? strerror(errno) : ""); + ret = RET_FAIL; + } else { + ksft_test_result_pass("futex2_wait\n"); + } + ksft_print_cnts(); return ret; } --- a/tools/testing/selftests/futex/functional/futex_waitv.c +++ b/tools/testing/selftests/futex/functional/futex_waitv.c @@ -88,7 +88,7 @@ int main(int argc, char *argv[]) for (i = 0; i < NR_FUTEXES; i++) { waitv[i].uaddr = (uintptr_t)&futexes[i]; - waitv[i].flags = FUTEX_32 | FUTEX_PRIVATE_FLAG; + waitv[i].flags = FUTEX2_SIZE_U32 | FUTEX2_PRIVATE; waitv[i].val = 0; waitv[i].__reserved = 0; } @@ -99,7 +99,8 @@ int main(int argc, char *argv[]) usleep(WAKE_WAIT_US); - res = futex_wake(u64_to_ptr(waitv[NR_FUTEXES - 1].uaddr), 1, FUTEX_PRIVATE_FLAG); + res = futex2_wake(u64_to_ptr(waitv[NR_FUTEXES - 1].uaddr), ~0U, 1, + FUTEX2_PRIVATE | FUTEX2_SIZE_U32); if (res != 1) { ksft_test_result_fail("futex_wake private returned: %d %s\n", res ? errno : res, @@ -122,7 +123,7 @@ int main(int argc, char *argv[]) *shared_data = 0; waitv[i].uaddr = (uintptr_t)shared_data; - waitv[i].flags = FUTEX_32; + waitv[i].flags = FUTEX2_SIZE_U32; waitv[i].val = 0; waitv[i].__reserved = 0; } @@ -145,8 +146,8 @@ int main(int argc, char *argv[]) for (i = 0; i < NR_FUTEXES; i++) shmdt(u64_to_ptr(waitv[i].uaddr)); - /* Testing a waiter without FUTEX_32 flag */ - waitv[0].flags = FUTEX_PRIVATE_FLAG; + /* Testing a waiter without FUTEX2_SIZE_U32 flag */ + waitv[0].flags = FUTEX2_PRIVATE; if (clock_gettime(CLOCK_MONOTONIC, &to)) error("gettime64 failed\n", errno); @@ -160,11 +161,11 @@ int main(int argc, char *argv[]) res ? strerror(errno) : ""); ret = RET_FAIL; } else { - ksft_test_result_pass("futex_waitv without FUTEX_32\n"); + ksft_test_result_pass("futex_waitv without FUTEX2_SIZE_U32\n"); } /* Testing a waiter with an unaligned address */ - waitv[0].flags = FUTEX_PRIVATE_FLAG | FUTEX_32; + waitv[0].flags = FUTEX2_PRIVATE | FUTEX2_SIZE_U32; waitv[0].uaddr = 1; if (clock_gettime(CLOCK_MONOTONIC, &to)) --- a/tools/testing/selftests/futex/functional/run.sh +++ b/tools/testing/selftests/futex/functional/run.sh @@ -76,9 +76,15 @@ echo echo ./futex_wait $COLOR +echo +./futex_wait -n $COLOR echo ./futex_requeue $COLOR +echo +./futex_requeue -n $COLOR +echo +./futex_requeue -x $COLOR echo ./futex_waitv $COLOR --- a/tools/testing/selftests/futex/include/futex2test.h +++ b/tools/testing/selftests/futex/include/futex2test.h @@ -8,6 +8,41 @@ #define u64_to_ptr(x) ((void *)(uintptr_t)(x)) +#ifndef __NR_futex_waitv +#define __NR_futex_waitv 449 + +struct futex_waitv { + __u64 val; + __u64 uaddr; + __u32 flags; + __u32 __reserved; +}; +#endif + +#ifndef __NR_futex_wake +#define __NR_futex_wake 454 +#define __NR_futex_wait 455 +#define __NR_futex_requeue 456 +#endif + +#ifndef FUTEX2_SIZE_U8 +/* + * Flags for futex2 syscalls. + */ +#define FUTEX2_SIZE_U8 0x00 +#define FUTEX2_SIZE_U16 0x01 +#define FUTEX2_SIZE_U32 0x02 +#define FUTEX2_SIZE_U64 0x03 +#define FUTEX2_NUMA 0x04 + /* 0x08 */ + /* 0x10 */ + /* 0x20 */ + /* 0x40 */ +#define FUTEX2_PRIVATE FUTEX_PRIVATE_FLAG +#endif + +#define FUTEX_NO_NODE (-1) + /** * futex_waitv - Wait at multiple futexes, wake on any * @waiters: Array of waiters @@ -20,3 +55,20 @@ static inline int futex_waitv(volatile s { return syscall(__NR_futex_waitv, waiters, nr_waiters, flags, timo, clockid); } + +static inline int futex2_wake(volatile void *uaddr, unsigned long mask, int nr, unsigned int flags) +{ + return syscall(__NR_futex_wake, uaddr, mask, nr, flags); +} + +static inline int futex2_wait(volatile void *uaddr, unsigned long val, unsigned long mask, + unsigned int flags, struct timespec *timo, clockid_t clockid) +{ + return syscall(__NR_futex_wait, uaddr, val, mask, flags, timo, clockid); +} + +static inline int futex2_requeue(struct futex_waitv *futexes, unsigned int flags, + int nr_wake, int nr_requeue) +{ + return syscall(__NR_futex_requeue, futexes, flags, nr_wake, nr_requeue); +}