update compat

[lttv.git] / ltt / branches / poly / doc / developer / tsc-smallv2.txt

diff --git a/ltt/branches/poly/doc/developer/tsc-smallv2.txt b/ltt/branches/poly/doc/developer/tsc-smallv2.txt
index e21cb9eee939fa5e4a12f4e0d0bf9f0dff11f8bc..d65cfed3bfd332dfd907acc5b7afb11b991fa897 100644 (file)
--- a/ltt/branches/poly/doc/developer/tsc-smallv2.txt
+++ b/ltt/branches/poly/doc/developer/tsc-smallv2.txt
@@ -122,7 +122,8 @@ Granularity : 800ns (200 cycles@4GHz) : 2^9 = 512 (remove 9 LSB)
 Min wrap : 100HZ system, each 3 timer ticks : 0.03s (32-4 MSB for 4 GHZ : 0.26s)
   (heartbeat each 100HZ, to be safe)
   Number of MSB to skip :
-    32 - find_first_bit(( (expected_longest_interrupt_latency()[ms] + max_timer_interval[ms]) / cpu_khz )) - 1
+    32 - find_first_bit(( (expected_longest_interrupt_latency()[ms] +
+       max_timer_interval[ms]) * cpu_khz[kcycles/s] )) - 1
     (the last -1 is to make sure we remove less or exact amount of bits, round
     near to 0, not round up).