samples/bpf/hbm.h

File Facts

System

Linux kernel

Corpus path

samples/bpf/hbm.h

Extension

.h

Size

1205 bytes

Lines

39

Domain

Support Tooling And Documentation

Bucket

samples

Inferred role

Support Tooling And Documentation: implementation source

Status

source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• No C-style include directives detected by the generator.

Detected Declarations

• struct hbm_vqueue
• struct hbm_queue_stats

Annotated Snippet

struct hbm_vqueue {
	struct bpf_spin_lock lock;
	/* 4 byte hole */
	unsigned long long lasttime;	/* In ns */
	int credit;			/* In bytes */
	unsigned int rate;		/* In bytes per NS << 20 */
};

struct hbm_queue_stats {
	unsigned long rate;		/* in Mbps*/
	unsigned long stats:1,		/* get HBM stats (marked, dropped,..) */
		loopback:1,		/* also limit flows using loopback */
		no_cn:1;		/* do not use cn flags */
	unsigned long long pkts_marked;
	unsigned long long bytes_marked;
	unsigned long long pkts_dropped;
	unsigned long long bytes_dropped;
	unsigned long long pkts_total;
	unsigned long long bytes_total;
	unsigned long long firstPacketTime;
	unsigned long long lastPacketTime;
	unsigned long long pkts_ecn_ce;
	unsigned long long returnValCount[4];
	unsigned long long sum_cwnd;
	unsigned long long sum_rtt;
	unsigned long long sum_cwnd_cnt;
	long long sum_credit;
};

Annotation

• Detected declarations: `struct hbm_vqueue`, `struct hbm_queue_stats`.
• Atlas domain: Support Tooling And Documentation / samples.
• Implementation status: source implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.