db5c71f4d5
OBS-URL: https://build.opensuse.org/request/show/476773 OBS-URL: https://build.opensuse.org/package/show/science:HPC/libpsm2?expand=0&rev=3
35 lines
994 B
Diff
35 lines
994 B
Diff
Index: libpsm2-10.3.1/psm_context.c
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===================================================================
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--- libpsm2-10.3.1.orig/psm_context.c
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+++ libpsm2-10.3.1/psm_context.c
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@@ -146,6 +146,19 @@ static int psmi_get_envvar(const char *e
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return 0;
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}
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+static inline
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+uint8_t
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+calc_hash(void *ptr, size_t nbytes)
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+{
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+ uint8_t *ucp = (uint8_t *) ptr;
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+ uint8_t hash = 0;
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+
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+ while (nbytes--)
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+ hash ^= *ucp++;
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+
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+ return hash;
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+}
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+
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static
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psm2_error_t
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psmi_compute_start_and_end_unit(psmi_context_t *context,long unit_param,
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@@ -180,8 +193,7 @@ psmi_compute_start_and_end_unit(psmi_con
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/* else, we are going to being looking at:
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(a hash of the job key plus the local rank id ) mod nunits. */
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- for (i=0;i < sizeof(job_key);i++)
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- hashedjk ^= job_key[i];
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+ hashedjk = calc_hash(job_key, sizeof(psm2_uuid_t));
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*unit_start = (psmi_get_envvar("MPI_LOCALRANKID") + hashedjk) % nunits;
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if (*unit_start > 0)
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*unit_end = *unit_start - 1;
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