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https://github.com/jemalloc/jemalloc.git
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fc615739cb
This adds a fast-path for threads freeing a small number of allocations to bins which are not their "home-base" and which encounter lock contention in attempting to do so. In producer-consumer workflows, such small lock hold times can cause lock convoying that greatly increases overall bin mutex contention.
32 lines
614 B
C
32 lines
614 B
C
#ifndef JEMALLOC_TEST_FORK_H
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#define JEMALLOC_TEST_FORK_H
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#ifndef _WIN32
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#include <sys/wait.h>
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static inline void
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fork_wait_for_child_exit(int pid) {
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int status;
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while (true) {
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if (waitpid(pid, &status, 0) == -1) {
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test_fail("Unexpected waitpid() failure.");
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}
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if (WIFSIGNALED(status)) {
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test_fail("Unexpected child termination due to "
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"signal %d", WTERMSIG(status));
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break;
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}
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if (WIFEXITED(status)) {
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if (WEXITSTATUS(status) != 0) {
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test_fail("Unexpected child exit value %d",
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WEXITSTATUS(status));
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}
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break;
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}
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}
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}
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#endif
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#endif /* JEMALLOC_TEST_FORK_H */
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