In OFED 1.2 perfquery attempts to check if a port supports extended
counters:
} else {
/* Should ClassPortInfo be implemented in libibmad ? */
pc2 = (uint16_t *)&pc[2]; /* CapabilityMask */
cap_mask = *pc2;
if (!(cap_mask & 0x100)) /* 1.2 errata: bit 9 is extended counter
support */
IBWARN("PerfMgt ClassPortInfo 0x%x extended counters not
indicated\n", cap_mask);
It seems to be what there are at least 2 problems here:
1. bit 9, if we're counting from 0, will have mask of 0x200,
not 0x100. mask of 0x100 will be for counter aggregation according
to IBA 1.2.
2. If capmask is 16 bit big-endian word, then we're looking
at the wrong byte on x86, we must ntohs(*pc2) first.
max
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