On Tue, Apr 17, 2018 at 09:12:45AM -0400, Nayna Jain wrote: > The TPM polling code in tpm_transmit sleeps in each loop iteration for > 5 msecs. However, the TPM might return earlier, and thus waiting for > 5 msecs adds an unnecessary delay. This patch reduces the polling sleep > time in tpm_transmit() from 5 msecs to 1 msecs. I'm not sure what TPM returning earlier has to do with this. TPM probably never returns exactly in the spec defined timeout/duration. I just don't understand reasoning in this paragraph. > Additionally, this patch renames TPM_POLL_SLEEP and moves it to tpm.h as > an enum value. > > After this change, performance on a TPM 1.2 with an 8 byte burstcount > for 1000 extends improved from ~14 sec to ~10.7 sec. You cannot give absolute numbers without a context (platform, software). > Signed-off-by: Nayna Jain <nayna@xxxxxxxxxxxxxxxxxx> /Jarkko
