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Keep things simple by not overconstraining Fmax

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This commit is contained in:
Eddie Hung 2018-07-28 22:57:37 -07:00
parent beabb429b0
commit 52cc146a67
1 changed files with 3 additions and 6 deletions
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9
common/timing.cc
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@ -158,13 +158,10 @@ void assign_budget(Context *ctx, bool quiet)
}
}
// If user has not specified a frequency, adjust the target frequency dynamically
// TODO(eddieh): Tune these factors
// If user has not specified a frequency, dynamically adjust the target
// frequency to be the current maximum
if (!ctx->user_freq) {
if (min_slack < 0)
ctx->target_freq = 1e12 / (default_slack - 0.95 * min_slack);
else
ctx->target_freq = 1e12 / (default_slack - 1.2 * min_slack);
ctx->target_freq = 1e12 / (default_slack - 1.2 * min_slack);
if (ctx->verbose)
log_info("minimum slack for this assign = %d, target Fmax for next update = %.2f MHz\n", min_slack,
ctx->target_freq / 1e6);