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Do not use the TSC where its known to be broken, this will cause the queue

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speeds to perform below the desired bitrate and throughput will be erratic.

This makes queueing work on the Geode SC1100, K5 model 0 and IDT WinChip C6
processors.

MFC after:	3 days
This commit is contained in:
Andrew Thompson 2006-03-02 00:51:39 +00:00
parent db45b073f7
commit 95d4af215e
1 changed files with 2 additions and 1 deletions
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3
sys/contrib/altq/altq/altq_subr.c
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@ -918,7 +918,8 @@ init_machclk(void)
#endif
#ifdef __i386__
/* check if TSC is available */
if (machclk_usepcc == 1 && (cpu_feature & CPUID_TSC) == 0)
if (machclk_usepcc == 1 && ((cpu_feature & CPUID_TSC) == 0 ||
tsc_is_broken))
machclk_usepcc = 0;
#endif