mercury

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Something that could be useful in Mercury for upper libraries like Margo is the possibility to inject user-provided file descriptors in the Mercury polling mechanism. Some use-cases would include injecting...

mdorier

NA OFI: hg_test* hangs using verbs;ofi_rxm with concurrent handles

8

Examples include hg_test_rpc, hg_test_rpc_lat, and hg_test_write_bw, all of which work correctly until the phase of the test that uses multiple handles or concurrent RPCs. This is with libfabric 1.6 and...

carns

NA SM: performance lowers when buffer size increases

2

When doing bulk transfers using the shared-memory plugin and process_vm_readv/writev calls, performance diminishes as the size of the data increases.

soumagne

Comment from Jeff: > One thing that occurred to me that may be more efficient is to do an atomic decrement rather than a CAS when releasing the lock. >...

soumagne

NA BMI: cannot transfer data larger than 16 MB

4

When transferring large data with the NA BMI plugin, Tang is reporting the following error: ``` # NA -- Error -- /global/homes/w/wzhang5/software/mercury/src/na/na_bmi.c:1773 [E 15:01:01.028255] src/io/bmi/bmi_tcp/bmi-tcp.c line 1313: Error: BMI message...

soumagne

Cannot HG_Forward to self

1

When SELF_FORWARD is disabled, the address returned by HG_Addr_self cannot be used to forward RPCs. Instead, one has to convert it into a string (HG_Addr_to_string) then do a lookup to...

mdorier

share registered memory across multiple bulk handles?

2

Consider the use-case of creating, and extending, buffer pools of registered memory (ie hg_bulk_t's). Right now, generating `N` bulk handles of size `S` requires `N` calls to HG_Bulk_create, which, depending...

JohnPJenkins

As the title says, would be good to have a way to tell whether an input bulk buffer (with permission HG_READ_ONLY) contains eagerly transmitted data, and further to get a...

JohnPJenkins

hg_proc size pass

1

Was thinking about the proc issues talked about in #79 and had the following idea: - have a new type of proc operation - HG_GET_SIZE, which increments two (new) size...

JohnPJenkins

document which function calls increment / decrement refcounts for handles

2

In an earlier meeting, there was some confusion about handle management. I.e. when must HG_Destroy be called? Clearing up this confusion amounts to improving documentation on when handle refcounts are...

JohnPJenkins