areusch commented on a change in pull request #7266:
URL: https://github.com/apache/tvm/pull/7266#discussion_r561212157
##########
File path: src/runtime/crt/host/main.cc
##########
@@ -93,6 +94,20 @@ tvm_crt_error_t TVMPlatformTimerStop(double*
elapsed_time_seconds) {
g_utvm_timer_running = 0;
return kTvmErrorNoError;
}
+
+static_assert(RAND_MAX >= (1 << 8), "RAND_MAX is smaller than acceptable");
+unsigned int random_seed = 0;
+tvm_crt_error_t TVMPlatformGenerateRandom(uint8_t* buffer, size_t num_bytes) {
+ if (random_seed == 0) {
+ random_seed = (unsigned int)time(NULL);
+ }
+ for (size_t i = 0; i < num_bytes; ++i) {
+ int random = rand_r(&random_seed);
+ buffer[i] = (uint8_t)random;
Review comment:
well in this case we don't have a tail to worry about because we
generate 32-bit random integers but throw away the upper 24 bits, and write the
lower 8 bits to successive bytes in `buffer`. we are throwing away randomness
but it's pseudorandomness anyhow. I may revisit this if generating random
tensors is slow in the AutoTVM PR.
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