TLS does not invoke hardware acceleration except on Intel/AMD platform

Mark Hack markhack at
Wed Sep 25 14:26:05 UTC 2019

ssl_algs.c is missing the required call to OPENSSL_cpuid_setup() which
means that all the platforms which rely on the CPU ID to be set
(everything except Intel/AMD) never use any of the EVP calls and do not
hardware accelerate TLS. Yes, the performance tests work but these do
not use libssl.

Patching ssl_algs.c corrects this and the performance improvement is
immediatly noticable. This is the patch applied and tested on PPC.

int SSL_library_init(void)
	OPENSSL_cpuid_init_setup();	/* Identify the HW platform */



Mark Hack

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