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c9c2a427dd
The 'perf bench futex' testcase fails on systems with more than 1K CPUs. Testcase: perf bench futex all Failure snippet: <<>>Running futex/hash benchmark... perf: pthread_create: No such file or directory <<>> All the futex benchmarks (ie hash, lock-api, requeue, wake, wake-parallel), pthread_create is invoked in respective bench_futex_* function. Though the logs shows direct failure from pthread_create, strace logs showed that actual failure is from "sched_setaffinity" returning EINVAL (invalid argument). This happens because the default mask size in glibc is 1024. To overcome this 1024 CPUs mask size limitation of cpu_set_t, change the mask size using the CPU_*_S macros. Patch addresses this by fixing all the futex benchmarks to use CPU_ALLOC to allocate cpumask, CPU_ALLOC_SIZE for size, and CPU_SET_S to set the mask. Reported-by: Disha Goel <disgoel@linux.vnet.ibm.com> Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Signed-off-by: Athira Jajeev <atrajeev@linux.vnet.ibm.com> Tested-by: Disha Goel <disgoel@linux.vnet.ibm.com> Acked-by: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nageswara R Sastry <rnsastry@linux.ibm.com> Cc: linuxppc-dev@lists.ozlabs.org Link: https://lore.kernel.org/r/20220406175113.87881-2-atrajeev@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> |
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.. | ||
bench.h | ||
Build | ||
epoll-ctl.c | ||
epoll-wait.c | ||
evlist-open-close.c | ||
find-bit-bench.c | ||
futex-hash.c | ||
futex-lock-pi.c | ||
futex-requeue.c | ||
futex-wake-parallel.c | ||
futex-wake.c | ||
futex.h | ||
inject-buildid.c | ||
kallsyms-parse.c | ||
mem-functions.c | ||
mem-memcpy-arch.h | ||
mem-memcpy-x86-64-asm-def.h | ||
mem-memcpy-x86-64-asm.S | ||
mem-memset-arch.h | ||
mem-memset-x86-64-asm-def.h | ||
mem-memset-x86-64-asm.S | ||
numa.c | ||
sched-messaging.c | ||
sched-pipe.c | ||
synthesize.c | ||
syscall.c |