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author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-17 16:56:17 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-17 16:56:17 -0800 |
commit | fa7f578076a8814caa5371e9f4949e408140766d (patch) | |
tree | 8021be6f956e8a259523c394a01183797ce04422 /tools/testing | |
parent | 2dcd9c71c1ffa9a036e09047f60e08383bb0abb6 (diff) | |
parent | d1b069f5febc850556cf49e9bb9092d3179c5be5 (diff) | |
download | linux-stable-fa7f578076a8814caa5371e9f4949e408140766d.tar.gz linux-stable-fa7f578076a8814caa5371e9f4949e408140766d.tar.bz2 linux-stable-fa7f578076a8814caa5371e9f4949e408140766d.zip |
Merge branch 'akpm' (patches from Andrew)
Merge more updates from Andrew Morton:
- a bit more MM
- procfs updates
- dynamic-debug fixes
- lib/ updates
- checkpatch
- epoll
- nilfs2
- signals
- rapidio
- PID management cleanup and optimization
- kcov updates
- sysvipc updates
- quite a few misc things all over the place
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (94 commits)
EXPERT Kconfig menu: fix broken EXPERT menu
include/asm-generic/topology.h: remove unused parent_node() macro
arch/tile/include/asm/topology.h: remove unused parent_node() macro
arch/sparc/include/asm/topology_64.h: remove unused parent_node() macro
arch/sh/include/asm/topology.h: remove unused parent_node() macro
arch/ia64/include/asm/topology.h: remove unused parent_node() macro
drivers/pcmcia/sa1111_badge4.c: avoid unused function warning
mm: add infrastructure for get_user_pages_fast() benchmarking
sysvipc: make get_maxid O(1) again
sysvipc: properly name ipc_addid() limit parameter
sysvipc: duplicate lock comments wrt ipc_addid()
sysvipc: unteach ids->next_id for !CHECKPOINT_RESTORE
initramfs: use time64_t timestamps
drivers/watchdog: make use of devm_register_reboot_notifier()
kernel/reboot.c: add devm_register_reboot_notifier()
kcov: update documentation
Makefile: support flag -fsanitizer-coverage=trace-cmp
kcov: support comparison operands collection
kcov: remove pointless current != NULL check
kernel/panic.c: add TAINT_AUX
...
Diffstat (limited to 'tools/testing')
-rw-r--r-- | tools/testing/selftests/vm/Makefile | 1 | ||||
-rw-r--r-- | tools/testing/selftests/vm/gup_benchmark.c | 91 |
2 files changed, 92 insertions, 0 deletions
diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile index e49eca1915f8..7f45806bd863 100644 --- a/tools/testing/selftests/vm/Makefile +++ b/tools/testing/selftests/vm/Makefile @@ -18,6 +18,7 @@ TEST_GEN_FILES += transhuge-stress TEST_GEN_FILES += userfaultfd TEST_GEN_FILES += mlock-random-test TEST_GEN_FILES += virtual_address_range +TEST_GEN_FILES += gup_benchmark TEST_PROGS := run_vmtests diff --git a/tools/testing/selftests/vm/gup_benchmark.c b/tools/testing/selftests/vm/gup_benchmark.c new file mode 100644 index 000000000000..36df55132036 --- /dev/null +++ b/tools/testing/selftests/vm/gup_benchmark.c @@ -0,0 +1,91 @@ +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include <sys/ioctl.h> +#include <sys/mman.h> +#include <sys/prctl.h> +#include <sys/stat.h> +#include <sys/types.h> + +#include <linux/types.h> + +#define MB (1UL << 20) +#define PAGE_SIZE sysconf(_SC_PAGESIZE) + +#define GUP_FAST_BENCHMARK _IOWR('g', 1, struct gup_benchmark) + +struct gup_benchmark { + __u64 delta_usec; + __u64 addr; + __u64 size; + __u32 nr_pages_per_call; + __u32 flags; +}; + +int main(int argc, char **argv) +{ + struct gup_benchmark gup; + unsigned long size = 128 * MB; + int i, fd, opt, nr_pages = 1, thp = -1, repeats = 1, write = 0; + char *p; + + while ((opt = getopt(argc, argv, "m:r:n:tT")) != -1) { + switch (opt) { + case 'm': + size = atoi(optarg) * MB; + break; + case 'r': + repeats = atoi(optarg); + break; + case 'n': + nr_pages = atoi(optarg); + break; + case 't': + thp = 1; + break; + case 'T': + thp = 0; + break; + case 'w': + write = 1; + default: + return -1; + } + } + + gup.nr_pages_per_call = nr_pages; + gup.flags = write; + + fd = open("/sys/kernel/debug/gup_benchmark", O_RDWR); + if (fd == -1) + perror("open"), exit(1); + + p = mmap(NULL, size, PROT_READ | PROT_WRITE, + MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); + if (p == MAP_FAILED) + perror("mmap"), exit(1); + gup.addr = (unsigned long)p; + + if (thp == 1) + madvise(p, size, MADV_HUGEPAGE); + else if (thp == 0) + madvise(p, size, MADV_NOHUGEPAGE); + + for (; (unsigned long)p < gup.addr + size; p += PAGE_SIZE) + p[0] = 0; + + for (i = 0; i < repeats; i++) { + gup.size = size; + if (ioctl(fd, GUP_FAST_BENCHMARK, &gup)) + perror("ioctl"), exit(1); + + printf("Time: %lld us", gup.delta_usec); + if (gup.size != size) + printf(", truncated (size: %lld)", gup.size); + printf("\n"); + } + + return 0; +} |